Vacuum Induction Melting Furnace
Vacuum induction melting furnace is one of the most widely equipment used in the field of vacuum metallurgy .The alloy and special steel needed for aerospace, missile, rocket, atomic energy equipment and electronics industry, a considerable proportion of the products are produced by vacuum induction melting furnace
For example, the hot workability and mechanical properties of nickel base, cobalt based and iron based superalloys are improved by vacuum induction melting furnace.
Such as stainless steel, heat-resistant steel, ultra high strength steel, tool steel, bearing steel, and magnetic material, elastic alloy, expansion alloy and so on, almost all are melted by vacuum induction melting furnace to ensure the material performance and quality.
With the development of the second remelting process, the other purpose of vacuum induction melting furnace is to provide high quality consumable electrode for vacuum consumable arc furnace or electroslag remelting furnace, and to produce master alloy for precision casting.
As is known to all, the whole process of melting, refining and alloying of metals in vacuum induction melting furnace is carried out in vacuum, thus avoiding the pollution of the same gas phase interaction,
Secondly, under the vacuum condition, carbon has strong deoxidization ability, and its deoxidation product CO is pumped out of the system continuously, overcoming the pollution problem of deoxidation with metal deoxidizer.
The chemical composition of the alloy can be controlled accurately by the vacuum induction melting furnace. The active elements such as Al, Ti, B and Zr, which have strong affinity with oxygen and nitrogen, can be controlled in a very small range.For low melting point volatile metal impurities, such as Pb, Bi, Sn, Sb and other evaporation can be removed, which plays an important role in improving the performance of materials.
The strong stirring action can accelerate the reaction speed, which has a good effect on the uniform temperature and uniform chemical composition of the melting pot.
The rapid development of vacuum induction melting technology is closely related to the high temperature alloy materials needed for aerospace industry, such as aerospace, missile, rocket, atomic energy equipment and other superalloys.
This is mainly due to the use of vacuum induction melting furnace smelting nickel, iron, cobalt based alloy, reduce the gap elements O2, N2, H2, can completely remove the non-metallic inclusions, and low melting point metal removal of harmful impurities, such as Pb, Bi, Sb, Cu, Sn, Te etc..
Vacuum induction melting furnace equipment is mainly composed of a furnace shell, inductor, crucible and furnace tilting mechanism, mold mechanism, power supply device, and a water cooling system. The furnace shell is equipped with observation, temperature measurement, feeding, sampling, tamping and other devices. The furnace is equipped with a vacuum system, a power supply system and a control system. There are two kinds of vacuum induction melting furnaces: intermittent type and semi continuous type, which can be used as horizontal or vertical type
To sum up, vacuum induction melting furnace has the following characteristics:
(1) in vacuum, it can melt some valuable active metals, such as titanium alloy, etc..
(2) in vacuum, it can prevent melting of metals and alloys, and react with non-metallic inclusions.
(3) in vacuum, the harmful dissolved gases and pollutants in molten metals can be removed.