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

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.

Medium frequency induction heating equipment gold quality leading industry

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.

The structure of the vacuum induction furnace

 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.

The working principle of vacuum induction melting furnace

The working principle of vacuum induction melting furnace

It is well known that vacuum induction melting furnace process, the metal melting, refining and the whole process of alloying was conducted under the vacuum state, thus avoiding the same gas phase interactions and pollution. Second, under the condition of vacuum, carbon has a strong deoxidization ability, the deoxidizing products CO is pumped to the system, overcome the pollution problem of using metal deoxidizer DNA. Vacuum induction melting furnace process can be precise control of chemical composition of alloy, the activity of containing oxygen, nitrogen and strong affinity of element Al, Ti, B, Zr, etc., can be controlled in the range of a few. Of low melting point metals volatile impurities, such as Pb, Bi, Sn, Sb can evaporate, which play an important part to improve the material performance. Strong induction mixing effect, can accelerate the reaction speed, for the uniform temperature of the molten pool, have the effect very much uniform chemical composition, etc.
Vacuum induction melting process has made rapid development is required for the aerospace industry and there is a close relationship between high temperature alloy material, such as aerospace, missile, rocket and atomic energy equipment needed for high temperature alloy. In not by adopting the method of vacuum smelting production of high temperature alloy, the highest working temperature is usually only 750-810 ℃; And by adopting the method of vacuum smelting production of high temperature alloy, the highest working temperature can reach 980-1090 ℃. This is mainly due to the adoption of vacuum induction melting furnace smelting nickel base and iron base, cobalt-based superalloy, O2, N2 and H2, reduces the gap elements can thoroughly remove non-metallic inclusion, as well as the removal of low melting point metal harmful impurities, such as Pb, Bi, Sb, Cu, Sn, Te, etc.

The application of vacuum induction furnace in the mold industry

The application of vacuum induction furnace in the mold industry

Vacuum heat treatment technology in the early stage of development in China in the 70 s, people mainly study the basic properties of vacuum heat treatment, the heating characteristics of metal evaporation problems and the basic rule of metal heating process under vacuum and deformation problem, at the same time to carry out the research of the typical heat treatment process, the vacuum oil quenching and vacuum gas quenching process, is used to study corresponding to laid the foundation for the further research and application of vacuum heat treatment technology.
Since the 80 s, vacuum heat treatment technologies are rapidly developing in our country, the introduction of advanced equipment, vacuum heat treatment (pit type furnace heat treatment of workpiece hardness testing method) technology application is becoming more and more widely.
High pressure gas quenching process, vacuum carburizing technology, vacuum sintering, vacuum brazing, vacuum ion carburizing (n, metal) technology research and application of started, vacuum heat treatment technology start from studies and a small amount of production to industrial production field.
With the progress of technology, entering the 90 s, vacuum heat treatment technology appeared a lot of new technology and new characteristics of high pressure gas quenching and application of high pressure gas quenching vacuum heating and rapid cooling technology, hot air circulation tempering vacuum cleaning technology, vacuum heat treatment equipment and process of intelligent control system, the vacuum nitriding technology, vacuum ion carburizing technology to flourish, such as in the United States, Germany, France, Japan, Britain and other countries is becoming a hot spot of new technology development. Tracking the international advanced technology in this field in our country, combined with national conditions, and actively research and development of our country's new technology wood equipment of vacuum heat treatment, such as high pressure gas quenching process, vacuum tempering hot air circulation fast cooling technology, continuous vacuum heat treatment process and vacuum carburizing, vacuum nitriding process, etc. In vacuum cleaning technology, vacuum heat treatment process and high temperature heat treatment fields such as intelligent control system is to research the exploration and development of industrial application test, the development of the vacuum heat treatment process at the end of the hing, bright prospects.

The degassing principle of vacuum induction furnace

  The degassing principle of vacuum induction furnace

  Degassing is material of slow evaporation in vacuum phenomenon, is the main problem on the vacuum performance. Any of the surface of the solid material is likely to be attached to gas and liquid accumulation form molecular layer. As a result of the pressure will gradually reduce the molecular layer gradually evaporate, because the surface energy is smaller than the vacuum energy.
  Nitrogen, and volatile solvent degassing speed faster, with an inert gas and oil and water vapor will continue to adhere to the surface, after a few hours will evaporate. Porous materials, dust particles can increase the surface area and other natural substances, so may cause more degassing. Radiation and temperature will provide enough energy to absorb molecules from the surface. Vacuum induction furnace temperature can release after low temperature when attached on the surface molecules. So, with the increase of furnace temperature, degassing phenomenon will gradually increase.

The operation principle of intermediate frequency induction furnace

The operation principle of intermediate frequency induction furnace

In molybdenum powder before choose coal furnace and electric resistance furnace drying more boring, with the skills and the advance of science and technology, foreign molybdenum powder choose sense of intermediate frequency furnace more boring.

The operation principle of medium frequency induction furnace is boring. Application by medium frequency induction furnace boring first is Faraday electromagnetic induction principle representation, namely alternating current will attack induced current in the conductor, and then the conductor between the appearance of the onset of fever, induction heating is a good form of electric heating, one of the electrical energy into heat energy, the three-phase power supply by medium frequency induction power supply into intermediate frequency alternating current, when the alternating current turned round induction coil, it will attack alternating magnetic field sensor, that is to say, will attack range and direction are alternating magnetic flux Φ changes over time.

When the conductive metal tube is placed within the induction coil, according to Faraday's law of electromagnetic induction, metal tube inside will attack the corresponding е induction electromotive force, because the metal is a conductor, intermediate frequency furnace would be due to the existence of the induced electromotive force induced current I2, the induced current I2 is called eddy current, and on the basis of joule - lenz's law, the eddy current in metal pipe with resistance must be internal flow at will attack will surely heat Q, and then make the metal is heated.