Vacuum melting furnace: small crucible furnace

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2017年1月16日星期一

The vacuum melting furnace

Equipment USES the product is mainly used for universities and colleges, scientific research institutions and production enterprises under the condition of vacuum or protective atmosphere of metal materials (such as stainless steel, nickel base alloy, copper, alloy steel, nickel and cobalt alloys, rare earth neodymium iron 錋) melting processing, can also be used for alloy steel vacuum refining processing and precision casting.
This product by the furnace cover, furnace body structure, furnace bottom, slewing mechanism of crucible, vacuum system and intermediate frequency power supply control system, etc.
Furnace cover, furnace, furnace bottom adopts double water cooling structure, keep the temperature of the bof shell is not more than 60 ℃. Furnace cover opened the way for manual and the furnace cover with observation holes and damper, to facilitate adding alloying elements to the process of melting, furnace cover on AD hoc alloy feeder. Furnace is an induction coil, by manual rotation handle outside the furnace can be easily within the crucible melting liquid poured into the mold, mold can be designed to be cooled. Upper crucible is equipped with a temperature measuring device.
By secondary pump, vacuum system, K - 300 oil diffusion pump and 2 x - 70 mechanical pump, mechanical pump is equipped with electromagnetic relief valve on the return oil after avoid blackouts. With bleed valve and charging valve on the vacuum unit.

2017年1月9日星期一

Correct single crystal furnace is safe and efficient operation

Single crystal furnace operation is also a science, before the formal operation, we need to check whether the temperature inside the furnace is suitable feed, does not allow loading in high temperature, check on the single crystal furnace control device to run, all the equipment should be under normal circumstances can be switched on.
Before loading operation, check the need to install the material, not into large pieces of material, removed first, back to the same melting also want to take it out, after crushing smaller material can be normal use, to ensure the normal operation of the incoming request is higher in a certain degree of the crucible, does not allow low, quartz crucible wall should pay attention to cleanliness, can't touch or other contact. Select the crucible can't rotate.
Operating equipment should pay attention to not be sharp Angle of the cut, at the time of loading to should take put down gently, not careless rude, the operator should pass professional guidance, bring clean gloves can't again after contact in addition to material things, to ensure that the material is clean, serious and responsible operation, smooth material had better be to realize a successful placement. Chunks of material not only after crushing, but should be placed close to the wall, adding suitable amount of dopant rear can continue to put small pieces of material.

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7月19日星期二

Vacuum melting furnace structure characteristics

Vacuum furnace is an induction coil, by manual rotation handle outside the furnace can be easily within the crucible melting liquid poured into the mold, mold can be designed to be cooled. Upper crucible is equipped with a temperature measuring device. By secondary pump, vacuum system, K - 300 oil diffusion pump and 2 x - 70 mechanical pump, mechanical pump is equipped with electromagnetic relief valve on the return oil after avoid blackouts. With bleed valve and charging valve on the vacuum unit.
This product by the furnace cover vacuum melting furnace structure, furnace, furnace bottom, crucible, vacuum system of slewing mechanism and intermediate frequency power supply control system, etc.
Furnace cover, furnace, furnace bottom adopts double water cooling structure, keep the temperature of the bof shell is not more than 60 ℃. Furnace cover opened the way for manual and the furnace cover with observation holes and damper, to facilitate adding alloying elements to the process of melting, furnace cover on AD hoc alloy feeder. Furnace is an induction coil, by manual rotation handle outside the furnace can be easily within the crucible melting liquid poured into the mold, mold can be designed to be cooled. Upper crucible is equipped with a temperature measuring device.
By secondary pump, vacuum system, K - 300 oil diffusion pump and 2 x - 70 mechanical pump, mechanical pump is equipped with electromagnetic relief valve on the return oil after avoid blackouts. With bleed valve and charging valve on the vacuum unit.
Medium frequency power supply can choose KGPS SCR or IGBT integration power supply, digital circuit, such as electrical system with over-current, over-voltage feedback and protection circuit.

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