Vacuum melting furnace: 2016

2016年12月30日星期五

Medium frequency induction furnace

Vacuum brazing furnace, medium frequency induction furnace medium frequency induction furnace used for power supply in 150 - a - 10000 hz frequency range of induction furnace as medium frequency induction furnace, the main in 150 - a - 2500 hz frequency range. Domestic small frequency power frequency induction furnace for 150, 1000 and 2500 Hertz.
Medium frequency induction furnace is a kind of applicable to the smelting of high quality steel and alloy smelting equipment, and work well in induction furnace has the following advantages:
1) the melting speed, high production efficiency. Medium frequency induction furnace power density is big, the power of each tonne of steel liquid configuration than about 20 a 30% larger power frequency induction furnace. Therefore, in the same conditions of medium frequency induction furnace melting speed, high production efficiency.
2) strong adaptability, flexible use. Each in medium frequency induction furnace molten steel can all net, replace the steel grade is convenient; Per furnace and power frequency induction furnace molten steel does not allow the net, you must retain part of the liquid steel for the start of furnace, thus replacing steel grade is not convenient, only applies to single varieties of steel smelting.
3) electromagnetic stirring effect is better. As a result of the liquid steel under electromagnetic force is with power frequency is inversely proportional to the square root, so stirring force of intermediate frequency power supply is smaller than power frequency power supply. For removing impurities in steel and homogeneous chemical composition, uniform temperature, stirring effect of intermediate frequency power supply is better. Power frequency power supply big stir force make molten steel on the lining of scouring force increases, not only reduce the refining effect and can dramatically reduce the useful service life of crucible.
4) starting operation is convenient. Due to the skin effect of medium frequency current greater than the power frequency current, so the intermediate frequency induction furnace at the start, no special requirements to burden, after loading can rapid heating temperature; While power frequency induction furnace for specialized production of furnace charge block (and the approximate size of crucible, about in the cast steel or cast iron piece of crucible half height) to start the heating, and heating up slowly. Read this, under the condition of cycle operation mostly use medium frequency induction furnace. Start convenient bring another advantage is that can save electricity when cycle operation.

2016年12月28日星期三

The preparation and production of induction melting furnace before use operation procedures

Preparation of the induction melting furnace before use
1. Check each distributor is normal.
2. Check the water, water pressure and flow rate is in line with the requirements.
3. Check the vacuum pump and vacuum system is normal.
4. Check the control cabinet and temperature measuring meter and the indicator light is normal.
5. The processed workpiece cleaned thoroughly with alcohol or gasoline
6. Artifacts in furnace, tooling, material basket, etc shall be clean and dry.
7. Vacuum cleaning furnace scale and sundry.
8. Use silk or wool fabric dipped in alcohol or gasoline wipe the oven door and furnace cover seal.
9. The workpiece is put should smooth and may not be in the running and scattered and crooked blowing process.
Induction melting furnace production operation procedures
1. The starting power supply, set the switch control cabinet in automatic control location.
2. Input the parameters of the process planning into the computer.
3. The workpiece with charging car smoothly away in furnace.
4. Close the oven door and lock (cover), to ensure the seal.
5. According to the technological requirements to choose good cooling medium and cooling method and pressure.
6. Press the cycle start button, equipment execution procedures: vacuum heating _ _ cooling automatically.
7. Check the equipment each system operation is normal, if there is any abnormal timely report the captain.
8. Before, we should restore the normal pressure in the furnace, the light is normal after open the oven door (cover).
9. When discharging, carefully operation, workpiece and tooling shall glory hole collision.

2016年12月23日星期五

Intermediate frequency electric furnace casting low-temperature wax

Intermediate frequency electric furnace casting low-temperature wax mould dewaxing easy preparation, high recovery and reuse pattern material. Faults caused by the low softening temperature strength is low, can not meet the higher requirements for quality castings, low temperature wax stearic acid in the process of using easy saponification deterioration of the casting surface quality, based on the above shortcomings have popped up in the production of medium temperature wax instead of low temperature wax and now the stearic acid price is more expensive, according to the manufacturer with their own way to choose a color.

2016年12月19日星期一

Induction melting furnace in iron industry "charm"

In the iron industry, the two most commonly used to induction melting furnace were power frequency induction furnace and intermediate frequency induction melting furnace.
First for medium frequency induction melting furnace, its strong adaptability, the variety of burden or piece of degree is not very strict, so widely used in melting cast iron, its melting alloy cast iron, nodular cast iron and so on need induction smelting products are widely used in manufacturing.
Power frequency induction furnace melting slag is relatively slow, some are not suitable for slagging, production lack of flexibility, cold start need to start, but at the same time it makes heating and metal melting, uniform heating temperature, burning loss is small, can facilitate the regulation of iron liquid ingredients, small relatively dirty. So usually suitable for metals and alloys remelting and heating up.

2016年12月15日星期四

Induction melting operation steps and common fault analysis

Induction smelting step useful check single crystal furnace, try single crystal furnace before formal jobs, single crystal furnace, melting product sampling inspection, adjustment test, the use of single crystal furnace power security, after the completion of these steps can be omitted.
Should be reviewed by induction melting equipment, see if there are any obvious damaged parts, and then according to the requirements of specification to the trial operation, if after trial work is normal, you can begin to formal production, but also constantly in the process of production of check products, to see if some of the products, product quality is qualified, if the index is not up to standard, will adjust the machine quality is unqualified, until melting product quality up to par.
Common single crystal furnace fault are crystal rods, single crystal furnace crystal rod shaking machine can still functioning, but the production efficiency is low, induction smelting products quality is poor so in order to improve the efficiency of the induction melting and quality, not blind smelting, must inspect the single crystal furnace. Crystal rods should inspect lift shaking head, cooling system and vacuum system. If it is lift head appear problem, is under maintenance, changed institutions or rotating mechanism. If it is cooling system and vacuum system appear problem, need to adjust the silicon material and structure of a heavy hammer. There is no problem if you examine these places, see if the inert gas such as argon flow inside the furnace, argon gas flow in the furnace, requires a modified single crystal furnace, the evenness of single crystal furnace thermal field distribution.

2016年12月12日星期一

Technical characteristics of medium frequency melting furnace

Medium frequency melting furnace for melting equipment in cast iron smelting and duplex melting has decades of history, China's manufacturing and labor frequency furnace and medium frequency furnace has a wealth of experience, in the power structure, frequency conversion technology, integrated control, circulating cooling technology and so on many aspects have made remarkable progress. Using medium frequency furnace melting and heat preservation of more and more manufacturers.
Medium frequency melting furnace features:
1) used for smelting medium frequency melting furnace, at present can be made in a single capacity also can achieve nearly tons, can meet the needs of the mass production. But many enterprises power capacity expansion is often difficult to overcome obstacles. Therefore, medium frequency melting furnace is more suitable for small and medium scale production.
2) commonly used medium frequency melting furnace to melt the various grades of steel and non-ferrous metals. Just for iron casting production, the adaptability of medium frequency melting furnace to product better than the cupola, medium frequency melting furnace can be a variety of high alloy cast iron smelting, such as high chromium cast iron.
3) medium frequency melting furnace are discontinuous melting, interval for a period of time to provide equal to furnace capacity of iron liquid, mode of production for stage duty, medium frequency melting furnace are more appropriate.

2016年12月8日星期四

Several advantages of medium frequency furnace

Medium frequency furnace has the following advantages:
1 simple, intermediate frequency furnace equipment. Compared with electric arc furnace, intermediate frequency furnace itself does not need large furnace equipment, don't need a large furnace equipment (such as hydraulic pressure, rotating mechanism, etc.), also don't require a lot of water cooling system, so its monomer equipment investment is relatively low, the equipment is simple and easy to master.
2, only has the function of the steel because of intermediate frequency furnace, no oxygen blowing in steelmaking process, so don't oxygen generator and other large equipment, it can also save money.
3, due to the small size, medium frequency furnace height is low, so the factory also was much lower than other steelmaking workshop, therefore, its cost in the factory building construction is also less than other types of steelmaking plant.
4, small and intermediate frequency furnace capacity, production arrangement is more flexible, especially suitable for small single piece casting production.
5, in addition, power frequency furnace and its related technology level is low, short-term easy to grasp.
6, the most low-end products in the market demand is not high, intermediate frequency furnace comprehensive cost is lower than other steelmaking process.

2016年12月4日星期日

The application of medium frequency induction heating technology

Induction heating technology in our country the earliest application military-industrial complex, automobiles, machinery and other industries, then gradually expand to the metallurgical industry, in the early 1980 s shougang special steel company in the domestic first began using the intermediate frequency heating technology, with 45 momnb, 35 crmo, 40 cr, 40 mn2mo and 45 # steel quenched and tempered treatment; For GCr15 steel tube cold working in the middle of the softening heat treatment; On 5 cr21mn9ni4n steel pipe solution heat treatment; For T10A, mn2 20, 20 # steel bar annealing heat treatment, has achieved good effect.
Using electromagnetic induction heating principle of intermediate frequency electric current for oil well tube of quenching, tempering and normalizing, in the United States and other developed countries have already belongs to a kind of mature technology, and in the field of oil special pipe manufacture to a wide range of applications. LONGSTAR company, unlimited companies in the United States, Russia, Japan JFE company tower dry rogge metallurgy factory, the volga steel pipe enterprise has its own medium frequency induction heat treatment production line.
Induction heating by electricity as an energy source, is completely different from using natural gas, gas, such as gas or liquefied petroleum gas in the heating process of steel tube produces soot, form of air pollution. Because power belongs to the green energy, will not cause damage to the environment, accord with the requirement of human society for environmental protection, so the government encourages the development of environmental protection technology development at home and abroad. At the same time, the use of induction heating technology to quenching, tempering and normalizing of steel tube, fast heating, high efficiency and convenient production organization

2016年12月1日星期四

What is the intermediate frequency furnace?

Intermediate frequency furnace using 200-2500 hz frequency induction heating power supply, heat insulation, it is mainly used for smelting carbon steel, alloy steel, special steel, also can be used for copper, aluminum and other non-ferrous metal smelting and the temperature. Equipment is small in size, light weight, high efficiency, less consumption, melting heat up quickly, easy to control furnace temperature, high production efficiency.
Medium frequency induction furnace hot water works
Using medium frequency furnace power supply mode is different from the power frequency electric boiler, is a 380 v power frequency ac power input of intermediate frequency power supply cabinet (intermediate frequency power supply is contained in the over-voltage protection, over-current protection, such as over voltage, over current phenomenon will automatically stop alarm), in the medium frequency power supply will be contained in the power frequency ac power rectifier for single phase dc, again through the inverter single-phase ac frequency voltage, electric current (single-phase ac frequency voltage and current are safe), the single-phase ac frequency voltage and current input induction heater produced for induction heating of the water in the boiler. This boiler heating process cwe separation, safe and reliable.

2016年11月28日星期一

Intermediate frequency electric furnace development in modern casting production

Modern medium frequency electric furnace machinery manufacturing technology and the rapid development of metallurgical technology on casting quality, elaboration, and energy saving requirements, such as high performance of ductile iron castings, vermicular graphite cast iron and the application of aluminum alloy castings, high quality castings, makes the induction furnace is increasingly important in the position in modern casting production. All made and new foundry casting workshop, the fuss made or acquire induction furnace is usually in the first place. As a result, "" in the selection of induction furnace is a subject worth attention.
Efficient, reliable and flexible operation of the intermediate frequency induction furnace of the development of manufacturing technology in vigilance and establishing the important position of induction furnace in foundry production process has played a role cannot be underestimated. From the bottom and has nearly a century of compared to traditional power frequency induction furnace, whether from the technical performance and job performance or from the aspects of investment, medium frequency induction furnace is the undisputed dominance. That makes it rapidly changing since the late 80 s of last century is widely applied in developed countries such as Europe, America, basically replaced the traditional power frequency induction furnace in our country has gradually disappeared from the market, the existing power frequency induction furnace in foundry are gradually replaced by medium frequency induction furnace in this technical improvement.

2016年11月24日星期四

Excellent performance of vacuum furnace

The pressure inside the chamber of a stove or furnace smoke into industrial furnace is lower than the atmospheric pressure. Vacuum furnace heating power, the heated surface oxidation, no decarburization, small deformation, the mechanical performance is good. Use the vacuum furnace smelting metal to remove impurities, less finished pinhole, segregation of small, good quality. Vacuum furnace is suitable for the high quality, high purity, refractory metal melting and heating, such as tungsten, molybdenum, tantalum, niobium, titanium, heat-resistant alloy steel smelting and magnetic materials, electrical materials of high strength steel, stainless steel, tool steel and die steel, heat treatment.
Before and after vacuum furnace appeared in the 1930 s. In 1927 the United States made electrical material vacuum annealing furnace. Vacuum since 1953 arc furnace power consumption in industry have been used for melting titanium sponge. Before and after the '50 s vacuum induction furnace is widely applied in industry. In 1960 the United States developed oil quenching vacuum furnace.

2016年11月21日星期一

Introduction of refractories in different position of induction melting furnace

The lining of introduction melting furnace is divided into four parts: furnace lid, furnace hearth, throat and and sensor. Especially throat,the most critical position’s refractory material directly affects the life and operating costs of the furnace.
1.Refractory material used in lid
The main effect of furnace lid is to reduce the heat loss of furnace, preventing the metal liquid splash, which requires the lid to be light weight, good insulation effect and anti-corrosion. At present, CCEWOOL ceramic fiber is light weight and low thermal conductivity, thus it is the most ideal refractory lining material. Due to the working temperature of furnace is below 800C, using steel nail or steel mesh to fix the blanket on lid
2.Refractory material used in hearth
The refractory material of hearth should use low porosity and high density CCEWOOL high alumina bricks.
3.Refractory material used in throat and sensor
The structure of throat and sensor is complicated, thus it mostly adopts unshaped refractory material. Castable uses high alumina refractory material, like corundum, mullite.

2016年11月18日星期五

The difference between vacuum brazing furnace and vacuum induction furnace

Vacuum brazing furnace is in a vacuum environment to be heated objects in protective sintering furnace, its heating mode is more, such as resistance heating, induction heating, microwave heating, etc.
Vacuum induction furnace is heated objects to make use of induction heating protective sintering furnace, can be divided into the power frequency, medium frequency, high-frequency, such as type, can be ascribed to a subclass of vacuum brazing furnace.

2016年11月16日星期三

Vacuum induction furnace processing technology

Vacuum furnace according to the structure can be divided into vertical and horizontal two series, the series is divided into vertical bell lift and lift the bottom tray. Horizontal series of single structure and front and rear double open the door to open the door again two kinds of structure. Furnace adopt water-cooled wall structures.
Heating equipment to protect the greenhouse adopts full metal type and compound two to choose from, all metal type of heat-resisting stainless steel and molybdenum screen; Compound of heat-resisting stainless steel, molybdenum screen and carbon felt, mullite fiber or silicate fiber composition. The specific choice depends on the user's process conditions and the requirement of process environment.
Heater is nichrome wire (belt), molybdenum wire (belt, bar), several types such as graphite, specific choice depends on the user's maximum temperature. Heater distribution have heating type and all-round heating two all around, to ensure that the user requirements for uniform temperature in the vacuum furnace type.
Cooling system has roots blower external loop structure, centrifugal fan centrifugal fan outside loop structure, cold wall circulate in several types such as the structure, meet the requirements of different cooling speed.
Vacuum system with pump + + mechanical pump, turbomolecular pump, turbomolecular pump, mechanical pump, diffusion pump, roots pump and mechanical pump, roots pump + mechanical pump, low temperature condensate pump + several types such as mechanical pump, according to the ultimate vacuum index selection.
Imported intelligent temperature controller, temperature control can realize the automatic control of heating, constant temperature, cooling function; With process curve storage function, can store several different process curve; Have litre cooling speed is adjustable and accurate clock function, can also according to the actual temperature and set temperature and other parameters; A vacuum furnace operation and power-fail protection function. Has a perfect alarm and protection.

2016年11月13日星期日

Discharge phenomenon in vacuum induction melting furnace

So shall we talk about, it measures have? Decline in the power supply voltage, increasing turn distance; Choose reasonable furnace coil connection methods are can be reached by effect of electric field strength. However, because of the limitation of by the coil structure, often cannot increase turns distance. Therefore, combined method of coil to become crucial in the planning of induction furnace.
(1) small vacuum furnace induction melting furnace usually choose single induction coil, (can supply voltage) between two terminal voltage of the biggest, interturn voltage is very low. And essential way to prevent this kind of induction furnace discharge is a decline in the power supply voltage, with increased according to the specific conditions of turns distance from (usually turn distance in 5 ~ 10 mm, not too much or it will cause a decrease in the electrical power). In the process of planning practice, most small vacuum induction furnace power use 250 v voltage, will not cause in the process of producing discharge of [3].
(2) large and medium-sized vacuum induction melting furnace sometimes needs to choose the method to connect two or more coils - series (figure 2) (a) or parallel (as shown in figure 2 (b)). Two conditions interturn electric field intensity can present different situation, analysis is as follows.
(a) for the two induction coil in series, in a flash the polarity as shown. Two coil into the electrical terminals (A +), the electrical terminals (B -) adjacent, assume that the supply voltage RMS V. According to the principle of electrotechnics, the two adjacent terminals (A +, B -) between the voltage amplitude was flat, in the opposite direction. For a maximum of 2 V. Maximum instantaneous field strength for/air gap.
(b) for the two induction coil in parallel, in a flash the polarity as shown. Two coil into the electrical terminals (A +), (B +) adjacent, assume that the supply voltage RMS V. According to the principle of electrotechnics, the two adjacent terminals (A + B +) between the voltage amplitude was flat, direction. For a maximum of 0. The maximum instantaneous field intensity is zero. The above analysis of vacuum induction melting furnace discharge phenomenon.

2016年11月10日星期四

Intermediate frequency electric furnace safety operation procedures

1, check things out before blowing in electrical equipment, water cooling system, sensor brass etc are in good condition, otherwise prohibited furnace.
2, furnace melting in excess of the prescribed shall promptly repair. It is strictly prohibited in melting too deep inside the crucible for melting.
3, sending and furnace should have someone who's in charge, after sending it is forbidden to contact sensors and cables. On duty shall not leave post, pay attention to the sensor and external circumstance of crucible.
4, loading, should check harmful items such as burden in presence of flammable and explosive mixed with, if you have to remove timely, it is forbidden to cold and wet material directly add to the liquid steel, melted liquid filled with first division after it is forbidden to chunk is expected to join in case cover.
5, and tamped crucible, scrap iron, iron oxide are forbidden to mix, rammed crucible must be compact.
6, pouring fields and official pit furnace should have no obstacle, no water, in case the steel landing explode.
7, molten steel are not allowed to dress too full, hand carry bags when pouring, two of them should be conformed to walk should be smooth, not allowed to walk fast abrupt stop, after pouring yu gang in a designated place, it is forbidden to dump.
8, intermediate frequency generator room should be kept clean, it is strictly prohibited flammable and explosive goods and other debris into indoor, indoor smoking ban.

2016年11月9日星期三

Principle of intermediate frequency furnace by what job

How medium frequency melting furnace works, what is the principle of intermediate frequency furnace? , for example, put a metal cylinder has alternating medium frequency current in induction coil, metal cylinder has no direct contact with induction coil, electric coil temperature is very low, but the surfaces are heated to redness, and even melt, and the redness and melting speed as long as adjust the size and the strength of the current frequency can be achieved. If the cylinder on the coil center, surrounding the cylinder temperature is the same, the cylinder heating and melting did not produce harmful gases, light environmental pollution.
Here is to introduce: medium frequency melting furnace is a kind of will power frequency 50 HZ alternating current into intermediate frequency (above 300 HZ and 20 k HZ) power supply device, the three-phase alternating current (ac) power frequency, after rectification into direct current, then laid adjustable intermediate frequency electric current, direct current supply by capacitance and induction coil in through the intermediate frequency alternating current, generate high density magnetic field lines in the induction coil, induction coil, and cutting in cheng fang of metal materials, produce a lot of eddy current in the metal materials. The vortex also has some properties of intermediate frequency electric current, i.e., the metal itself free electrons in the resistance of the metal body flow to generate heat.

2016年11月3日星期四

Medium frequency melting furnace main characteristics

Medium frequency melting furnace medium frequency power supply adopts solid-state IGBT inverter and power regulation, is the assurance of high reliability;
Medium frequency melting furnace equipment in the design the all-round protection function like over current protection, owe water protection, overheating protection, over-voltage protection, short circuit protection, open phase protection, etc., more than increase equipment reliability and convenient equipment maintenance work;
Medium frequency melting furnace equipment has a variety of display functions such as frequency display, voltage, current, power, according to make the equipment working condition direct, to design and capacitance induction coil regulation more guidance;
Medium frequency melting furnace super small volume, light weight, portable, covers an area of less than 1 square meters;
Medium frequency melting furnace 24 hours uninterrupted smelting capacity;
Intermediate frequency furnace energy saving energy saving, capable, electromagnetic stirring of molten material more uniform;
Medium frequency melting furnace convenient change different weight, different materials, different ways of the furnace body, to adapt to the requirements of various kinds of melting.

2016年10月31日星期一

Environmental characteristics of medium frequency heating equipment

Medium frequency heating furnace is a kind of will power frequency 50 hz alternating current into intermediate frequency power supply device, the three-phase alternating current (ac) power frequency, after rectification into direct current, then laid adjustable intermediate frequency electric current, direct current supply by the capacitor and inductor in the flow of intermediate frequency alternating current, generate high density magnetic field lines in the induction coil, induction coil, and cutting in cheng fang of metal materials, produce a lot of eddy current in the metal materials.
Professional build medium frequency heating furnace/frequency diathermy equipment series of characteristics of heating furnace, heating speed, high production efficiency, less oxidation decarburization, save material and cost, extend the life of the mold.
Due to the principle of electromagnetic induction medium frequency induction heating, the heat inside the workpiece itself, ordinary workers with intermediate frequency electric furnace to work after ten minutes for the task of forging work continuously, without burning furnace professional workers for burning furnace and furnace work ahead of time. Due to the heating mode heat up fast, so few oxidation, medium frequency heating forging of oxidation burning loss is only 0.5%, gas stove heating oxidation burning loss of 2%, coal-fired furnace reached 3%, intermediate frequency heating process saving material, every tons of forgings and burn coal stove compared to save steel raw materials for at least 20 to 50 kilos. The material utilization rate can reach 95%. Table due to the heating way heating uniformity, core temperature difference, so in terms of forging also greatly increase the service life of forging die, forging surface roughness is less than 50 um technology of energy saving, energy-saving 31.5% ~ 54.3%, the proportion of medium frequency heating oil heating than gas heating energy saving 5% ~ 40%. Heating quality is good, can reduce the rejection rate of 1.5%, increasing production rate of 10% ~ 10%, 10% ~ 15% extend the die life.

2016年10月26日星期三

Medium frequency induction furnace work on what principle

How intermediate frequency induction furnace works, what is the principle of intermediate frequency induction furnace, the following is to introduce: medium frequency induction furnace is a kind of will power frequency 50 HZ alternating current into intermediate frequency (above 300 HZ and 20 k HZ) power supply device, the three-phase alternating current (ac) power frequency, after rectification into direct current, then laid adjustable intermediate frequency electric current, direct current supply by capacitance and induction coil in through the intermediate frequency alternating current, generate high density magnetic field lines in the induction coil, induction coil, and cutting in cheng fang of metal materials, produce a lot of eddy current in the metal materials.
The vortex also has some properties of intermediate frequency electric current, i.e., the metal itself free electrons in the resistance of the metal body flow to generate heat. , for example, put a metal cylinder has alternating medium frequency current in induction coil, metal cylinder has no direct contact with induction coil, electric coil temperature is very low, but the surfaces are heated to redness, and even melt, and the redness and melting speed as long as adjust the size and the strength of the current frequency can be achieved. If the cylinder on the coil center, surrounding the cylinder temperature is the same, the cylinder heating and melting did not produce harmful gases, light environmental pollution.

2016年10月23日星期日

Several advantages of medium frequency induction furnace

1 simple, intermediate frequency induction furnace equipment. Compared with electric arc furnace, medium frequency induction furnace itself does not need large furnace equipment, don't need a large furnace equipment (such as hydraulic pressure, rotating mechanism, etc.), also don't require a lot of water cooling system, so its monomer equipment investment is relatively low, the equipment is simple and easy to master.
2, only has the function of the steel because of intermediate frequency furnace, no oxygen blowing in steelmaking process, so don't oxygen generator and other large equipment, it can also save money.
3, due to the small size medium frequency induction furnace, high low, so the factory also was much lower than other steelmaking workshop, therefore, its cost in the factory building construction is also less than other types of steelmaking plant.
4, small and intermediate frequency induction furnace capacity, production arrangement is more flexible, especially suitable for small single piece casting production.
5, in addition, power frequency furnace and its related technology level is low, short-term easy to grasp.
6, the most low-end products in the market demand is not high, the comprehensive cost of the intermediate frequency induction furnace is lower than other steelmaking process.

2016年10月19日星期三

Induction heating furnace of market strategy

Induction heating technology in metallurgical industry heat treatment is a new energy-saving technology. In heat treatment industry, the induction heating furnace because of its fast heating, high energy utilization and energy conservation and environmental protection advantages is widely attention and application of heat treatment industry is a revolutionary technological progress. And iron and steel production, for example in metallurgical industry, iron and steel production points, long, short process, short process of smelting process is based on electric furnace smelting equipment, renewable scrap steel as the main raw material, the production process is beneficial to environmental protection, along with the advance of the electric furnace smelting technology, short process of smelting technology has more and more strong vitality and competitiveness.
There are two kinds of iron and steel production process, short process and long process. Long process consists of the blast furnace, converter, continuous casting and rolling process consisting of; Short process is made up of electric furnace, refining outside the furnace, continuous casting and rolling process. Long process of smelting process for iron ore, coke, coal, limestone and so on scarce resources dependence is extremely strong, is not conducive to environmental protection. At the same time, the discharge of waste gas, waste residue, waste water in the process of production is bigger, dealing with three wastes costs is higher, make long process technology is facing challenges. Short process of smelting process in electric furnace for smelting equipment, renewable scrap steel as the main raw material, is beneficial to environmental protection, in terms of short process of smelting equipment, electric furnace, divided into two kinds of electric arc furnace and induction furnace. Although the traditional electric arc furnace in metallurgical industry occupies a dominant position. But the induction furnace smelting principle makes it have the advantage of innate difference in electric arc furnace.

2016年10月17日星期一

Medium frequency melting furnace cast iron is the development direction

Compared with cupola, using medium frequency furnace iron liquid, can reduce pollution of the environment, is advantageous to the liquid iron quality control, investment is less, and can be easily for nodular cast iron, vermicular cast iron and grey cast iron and other cast iron grade of production, mode of production is very flexible. Compared with using mainly iron ingredients melting scrap steel carburization process smelting iron liquid, can reduce the cost of iron liquid, 1000 yuan.
Medium frequency furnace melting iron liquid, after crushing, processing clean blasting foundry return, can significantly improve the quality of molten iron, reduce energy consumption of molten iron. Our foundry in 10 t worked as a production test on the intermediate frequency furnace, using clean furnace charge back, in the production of high-power diesel engine cylinder head, casting blowhole rejection rate was 6% lower, liquid iron smelting consumption reduce 90 kw · h/t; At the same time can effectively reduce the labor intensity of workers, grilled slag, improving casting smelting operation environment, reduce the slagging phenomenon of power frequency furnace throat opening, solve the problem of difficult after the oven slagging, prolonging the service life of power frequency furnace lining 20%, improve the efficiency of smelting production. Therefore, using medium frequency furnace melting iron liquid, to attach great importance to purification of furnace charge, especially back to the burden of crushing, blasting purification treatment, which is play the efficiency of the intermediate frequency furnace smelting iron a very important link.

2016年10月13日星期四

Vacuum furnace smelting non-ferrous metal alloy

Non-ferrous metal alloy vacuum furnace smelting in below atmospheric pressure until the high vacuum (from 100 kpa to 1.3 x 10-10 pa) under the condition of non-ferrous metal smelting and casting process. The production of refractory, rare and active metal material, is also a material with high purity and high quality metal important modern smelting technology. Vacuum smelting in 1917 began to transition from laboratory scale to the factory, at that time, only a small amount of smelting nickel base alloy, thermocouple material and heat resistance. With the development of vacuum technology and military industry and modern science and technology, the need for high performance new metal materials, vacuum melting has been developing rapidly. Titanium in the 1950 s began to mass production. In the 70 s have dozens of tons to hundreds of tons of capacity of vacuum smelting equipment, now has developed into a important production department is equipped with modern technology and equipment of special material. Vacuum melting because the purification effect of strong, volatile impurities, gas effect is good, strong deoxidization ability, nitride and hydride can pyrolysis, some cannot be under atmospheric chemical reactions can also, especially the reaction with gaseous product formation, so to get high purity, uniform texture, low air content, less impurity, less defect and good performance of metal material processing. Atomic energy industry with high purity barium, hafnium and vanadium and thorium, high temperature alloy, thermoelectric, active metal titanium and zirconium alloys and magnetic materials, refractory metal, tungsten, molybdenum, tantalum, niobium and electric vacuum with copper, nickel alloys were produced by vacuum remelting process. Main vacuum smelting equipment and method of vacuum induction melting furnace, electric arc furnace smelting (see non-ferrous metal alloy vacuum arc furnace smelting) and electron beam furnace smelting 3 kinds.
Vacuum induction furnace smelting, is to put the sensor and the crucible into a vacuum, in 2 ~ 1.3 x 1.3 x 10-10-3 pa vacuum melting, used in the production of high temperature alloy and precision. Electron beam furnace smelting is under high vacuum (1.3 x 1.3 x 10-1 ~ 10-5 pa) with one or several, electron beam emitted from the electron gun bombardment was melted objects to melt drip into the condensed ingot water-cooled copper mold. Electron beam furnace smelting Yu Chaochun metal and refractory metal smelting.

2016年10月11日星期二

Good vacuum induction furnace protection maintenance methods

Good vacuum induction furnace protection maintenance methods:

1) the pump protection maintenance, please see the detail its use manual;
2) vacuum induction furnace, when not in use for a long time, it is necessary to properly keep system with cooling water should be put on net. Especially in the winter should adhere to the indoor temperature above 10 ℃, smooth with antifreeze bad equipment and adhere to the outstanding conditions;
3) work to introduce choose 46 anti-wear hydraulic oil, oil using oil temperature within 15 ℃, 60 ℃;
4) the oil should be consented to enter the tank after strict filtering;
5) oil each replaced once a year, for the first time in the replace time shall not exceed three months;
6) check check once every six months pressure gauge,
7) the machine is stopped for a long time, the processing appearance should be wiped clean and coated with anti-rust oil.
8) don't know the structure of the machine function or procedure should not private line to start the machine;
9) machine in the process of operation, should not be for maintenance and adjustment mould;
10) when machine found serious leak or other abnormal (such as the action is not reliable, large noise, vibration, etc.) should be parking analysis reason, try to wipe out, not being put into production.
11) shall not be overloaded or beyond the maximum offset distance use;
12) long-term need not when vacuum induction furnace, vacuum box should be insured deposit under the vacuum condition, all equipment cooling water should be put on net. Especially in the winter should adhere to the indoor temperature above 10 ℃, smooth with antifreeze bad equipment and adhere to the outstanding conditions;
13) before beginning each technical process, should be measured a heater resistance and insulation resistance to ground, ensure no short circuit, open circuit representation;
14) regularly check system all wiring is loose or break line, such as found that should tighten loose place, will break from cohesion;
15) heating chamber, such as attack damage need to replace, otherwise the heat preservation effect;
16) to check the electric control cabinet back each relay is instrumentation, such as loose surface are detected, should be timely put tight;
17) time to arrange, electric control cabinet to remove adherent dust, crushed, metal scraps, etc., don't make it work for a long time in high temperature, moisture, dust pollution environment;
18) claims that did not work, please send electric control cabinet back all the status of the circuit breaker from ON to OFF, or directly closed the total power, avoid shock disturbance;
19) using the touch screen, pay attention to the operation process, avoid the wrong operation; Touch screen together to gently, avoiding the damage to the screen.

2016年10月8日星期六

Vacuum induction brazing furnace process method

Vacuum induction brazing furnace process methods is more, mainly is divided according to the use of equipment and working principle. According to the heat source such as have infrared, electron beam, laser, plasma, glow discharge brazing, etc.; According to the working process of the points have contact reaction brazing and diffusion brazing, etc. Contact reaction brazing is the use of filler metals andparent metal reaction liquid filling joint gap. Diffusion brazing is to increase the thermal diffusion time, make the weld and parent metal full homogenization, to get the same as the parent metal properties of joints. Vacuum induction brazing furnace process method
Soldering iron soldering for small soft soldering of simple or very thin parts.
Wave soldering is used for large quantities of printed circuit boards and electronic components assembly welding. Welds, around 250 ℃ in the molten solder under the pressure of pump through the narrow seam formation wave, workpiece after wave for welding. This method is of high productivity, can realize automatic production on line.
Flame brazing with combustible gases mixed with oxygen or air combustion flame as a heat source in welding. Flame brazing equipment is simple, easy to operate, according to workpiece shape available flame heating welding at the same time. This method is suitable for the bicycle frame, aluminum water spout and other medium and small welding.
Dip soldering part or the whole workpiece in covering flux of solder bath or only the molten salt salt bath heat welding. This method is heated evenly and quickly, more accurate temperature control, suitable for mass production and welding of large components. Salt bath salt in more composed of soldering flux. After welding workpieces are often left plenty of soldering flux, cleaning work.
Induction brazing with high frequency, intermediate frequency or power frequency inductive current welding method as a heat source. High-frequency heating is suitable for welding thin wall pipe fittings. Coaxial cable and jewels can be away from the power of the induction coil, the field brazing, especially suitable for some large components, such as the rockets need to remove the pipe joint welded on.
Furnace brazing will be assembled in solder artifacts in heating furnace of welding, often need to add solder, also can use a reducing gas or inert gas protection, heat evenly. Mass production can be adopted when the continuous furnace.
Vacuum induction brazing furnace workpiece heating in vacuum chamber, is mainly used to request the product with high quality and ease of oxidation material welding.

2016年9月29日星期四

Medium frequency induction furnace production flexibility

Induction quenching furnace in steel industry's role is irreplaceable, medium frequency induction furnace has greater flexibility in produce decorate on, melting operation has greater sensitivity. About power frequency induction furnace for discontinuously task, due to the continuous will add cold start cold start not only add the melting time and power cost, and each one must still use the boot block. And intermediate frequency furnace in for a short time, in the application is not using the boot block with a cold start, intermediate frequency furnace change is very convenient, in the charge of iron liquid and can be completely empty, the material of intermediate frequency furnace can finish within short time change, intermediate frequency furnace to produce organization arrangement. The premise for single small batch produces favor.
Intermediate frequency furnace, for example, in the iron and steel metallurgy enterprises industry repair workshop, the first bear the required spare parts, spare parts and large iron and steel enterprise cost a yield, and is more sheet small batch production, sort is more, the material requirements often change. The fruit of the intermediate frequency induction furnace in this respect has sensitivity, compensated the power frequency induction furnace and the other the lack of smelting furnace.

2016年9月26日星期一

The advantages of medium frequency melting furnace gathers numerous

Medium frequency melting furnace is a new type of heating equipment, made a huge contribution to iron ore industry, it is a lot of advantages in one of the product, so it was very popular. It is in use process plays a what advantage?
First, installation and operation is very convenient, which is quick to learn;
Second, intermediate frequency magnetic field of molten metal magnetic stirring effect, are beneficial to homogeneous and scum
Third, 24 hour uninterrupted smelting capacity;
Fourth, convenient change different weight, different materials, different ways of the furnace body, to adapt to all kinds of melting requirements; Vertical furnace, manual melting furnace, electric furnace, and the school laboratory furnace, portable high frequency melting furnace.
Fifth, save electricity saving energy; Power using IGBT power components, imports more integrated miniaturization, effective power output reached more than 90%.
Sixth, adopt the subminiature medium frequency induction heating power supply, 60% energy saving than the traditional SCR intermediate frequency!
Seventh, good diathermancy, heating temperature uniformity
Eighth, super small volume, light weight, portable, covers an area of less than 1 square meters
Ninth, according to the recommended equipment and maximum amount of smelting, each furnace smelting time for 20 to 30 minutes
Our company specializing in the production of intermediate frequency furnace and medium frequency furnace and other heating equipment, can provide customers with the best quality products, to meet the different needs of customers. We do professional, advanced and reliable. The rationality of the design of precise calculation, let each components can reasonable use, reduce loss, save electricity.

2016年9月21日星期三

Prospects of the development of vacuum induction furnace

Vacuum induction furnace oxidation, decarbonization, surface brightness, small deformation, no pollution, energy saving, high degree of automation, as well as the advantages of wide scope of application, in recent years is one of the faster growing new technology of heat treatment, especially in the case of aviation materials surface modification gain great progress. Many of the new development of advanced heat treatment technology, such as vacuum high-pressure gas quenching, vacuum chemical heat treatment, etc., also need to implement at the bottom of the vacuum. The vacuum heat treatment technology can make the structure material, working mould quality and greatly improve the service life, especially suitable for some precision parts heat treatment.
With the development of the vacuum heat treatment technology, vacuum heat treatment equipment such as vacuum tempering furnace, vacuum heat treatment furnace, vacuum annealing furnace, vacuum carburizing furnace, vacuum sintering furnace, vacuum brazing furnace was successfully developed at home, such as vacuum furnace in industrial manufacturing technology and equipment level enhances unceasingly, vacuum degree has reached the international level, but in automation control and device on the precision processing of, there is still a gap with foreign, especially in ultrahigh vacuum furnace on the stability of performance remains to be the improvement of precision devices. In addition test technology and the development of measuring instruments also has a great influence of vacuum equipment, especially the automatic test and control technology. Limiting vacuum of vacuum equipment, vacuum degree of work, empty furnace fit time, pressure rise rate, furnace temperature uniformity and empty furnace heating time parameters such as accurate measurement, and performance is the main embodiment of vacuum furnace performance.
In the industrial developed countries, the proportion of the vacuum heat treatment furnace has reached about 20%, and about 1200 sets of vacuum heat treatment furnace in our country at present, about 1% of the total number of heat treatment furnace, and a big gap in foreign countries, is expected in the future, as the heat treatment industry technology progress and requirement for the quality of heat treatment of workpiece is higher and higher, the development of the vacuum heat treatment will be larger.

2016年9月19日星期一

Vacuum furnace maintenance technology

Because the types and forms of vacuum heat treatment to protect a lot, so the maintenance and overhaul project each are not identical. Maintenance check content should be based on the stove technology file and can be divided into every furnace according to the actual needs, daily, monthly, every half a year and every year for the project. The following eight o 'clock every furnace are summarized, the daily repair and maintenance projects.
1. To have spirit town function of the air pump, should be in the daily check and according to the need to be open before blowing in 30 min, to eliminate the moisture in oil pump.
2. Regularly check the cooling water, compressed air, hydraulic system pressure and the flow of cooling water.
3. The oven door rubber seals and flange surface should be checked before care door, can't have sand and sundry, with thousands of net stretched cloth to wipe the rubber sealing ring and the flange surface, then evenly coated with vacuum grease rear can close the oven door.
4. The workpiece must be cleaned before charging. After oil quenching treatment should be soaked in oil of oil in the material box, carrying parts all clean.
5. The air-filled motor is generally used in vacuum can not start must be inflated to start and electric interlock protection device to protect.
6. Roots pump should be in above of 133 pa vacuum can start, also should have electric interlock protection device to protect.
7. To have compressed air piping, open the drain valve should be released water every day.
8. Often pay attention to the cooling water in and out of the water temperature indicator is normal, check the touch electrode joint, oven door, whether there are local in areas such as the transformer cooling water pipe temperature anomalies.

2016年9月15日星期四

The development of the multi-purpose high temperature vacuum induction furnace

According to thermal ion fuel element manufacturing process and equipment requirements, combined with high temperature and vacuum brazing furnace and vacuum annealing furnace structure, developed by the multi-purpose tantalum high-temperature vacuum furnace, it can be used to vacuum annealing, high temperature degassing, high temperature vacuum brazing process for many purposes, etc. Main technical parameters of no.1 is: the limit temperature of 2000 ℃; Ultimate vacuum 7 x 10-5 pa; Vacuum hot work about 10-4 pa; Effective heating zones Ч sizes ф 80 mm 80 mm; Mean temperature zone temperature deviation plus or minus 5.6 ℃ or less and more than 1600 ℃ measurement; Manual and automatic temperature control temperature control mode, can free conversion; Automatic temperature control error of 0.3% or less; The vacuum system for oil free vacuum system; Take time to time to 7 x 10-4 pa, 20 min or less; 20 kw power rating. Has a high working temperature and vacuum degree, time quick, no oil vapor pollution, thermal inertia small, uniform temperature, temperature control accurate, convenient operation, safe and reliable characteristics. This furnace is designed for single room, vertical, loading, internal heating, resistance heating, vacuum furnace, tantalum heating element, metal screen heat insulation structure. This type of vacuum furnace thermal inertia small, high working temperature, but more complex structure and control, manufacturing installation accuracy requirement is high, difficult to debug. The whole equipment mainly includes vacuum furnace shell, heating element and the metal heat shield, vacuum system and electric control system and so on several parts.

2016年9月12日星期一

Medium frequency induction heating equipment gold quality leading industry

At present, the market has a variety of medium frequency induction heating equipment, each manufacturer's model is multifarious, but regardless of the type variable, although these equipment from different manufacturers shape difference is not big, but performance is differ in thousands ways, such as market commonly used medium frequency induction heating equipment.
Customer demand determines the market trend, the heat treatment of the basic requirements of the customer quality and practicability of the forging heat treatment equipment to ascend, and forging heat treatment equipment for precision machinery, determines the quality of the fundamental originated in advanced manufacturing technology and high quality high-end processing equipment. Therefore, only a real strength as relying on forging heat treatment equipment manufacturers, to produce in accordance with customers to use forging heat treatment equipment.
Medium frequency induction heating equipment manufacturers as the first brand of medium frequency induction heating equipment, professional from intermediate forging heat treatment equipment, intermediate frequency induction furnace, induction furnace, high frequency of forging heat treatment equipment research and development, production, marketing and after-sales service in one of the high-tech enterprise.

2016年9月9日星期五

The structure of the vacuum induction furnace

Induction vacuum furnace in the furnace chamber within a particular space using a vacuum system (by the vacuum pump, vacuum measuring equipment, vacuum valves and other components is assembled by meticulously) will be some material discharge furnace chamber, the furnace chamber pressure is less than a standard atmospheric pressure, and complete vacuum furnace cavity space, which is a vacuum furnace.
Vacuum induction furnace usually by host, furnace, electric equipment, sealing furnace shell, vacuum system, power supply system, temperature control system and truck outside the furnace, etc. Sealing furnace shell made of carbon steel or stainless steel welding is removable parts of joint face seal with vacuum sealing material. To avoid heated furnace shell deformation and metamorphism sealing material is heated, usually with water-cooled or air-cooled cooling furnace shell. Chamber of a stove or furnace located sealing furnace shell. According to use the stove, inside the furnace is equipped with different types of heating elements, such as resistor, inductor, electrode and electron gun. Metal smelting in a crucible furnace, vacuum furnace of some manipulator with active casting equipment and loading. Vacuum system is mainly composed of vacuum pump, vacuum valves and vacuum gauge, etc.

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