Induction melting operation steps and common fault analysis

 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.

Technical characteristics of medium frequency melting furnace

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.

Several advantages of medium frequency furnace

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.

The application of medium frequency induction heating technology

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

What is the intermediate frequency furnace?

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.

Intermediate frequency electric furnace development in modern casting production

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.

Excellent performance of vacuum furnace

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.