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The history of the vacuum furnace

The pressure inside the furnace can be evacuated to below atmospheric pressure of industrial furnaces. Vacuum furnace is electrically heated surface is heated no oxidation, decarbonization, deformation small, good mechanical properties. Vacuum furnace melting metal in favor of removing impurities, finished pinholes and small in segregation, good quality. Vacuum furnace for high quality, high purity, refractory metals smelting and heating, for example, for tungsten, molybdenum, tantalum, niobium, titanium, heat-resistant alloy smelting and magnetic materials, electrical materials, high-strength steel, stainless steel, tool heat-treated steel, tool steel and the like.
Vacuum furnace appeared in around the 1930s. 1927 American made electric material vacuum annealing furnace. 1953 vacuum consumable arc furnace in the industry have been used for melting titanium sponge. Before and after the 1950s, vacuum induction furnace is widely used in industry. 1960 United States developed an oil quenching vacuum furnace.
Vacuum furnace generally consists of furnace, electric devices, sealed furnace shell, vacuum system, power supply system and temperature control systems and other components. Sealing furnace shell welded carbon steel or stainless steel, removable parts for sealing joints vacuum sealing material. After the furnace shell to prevent heat deformation and heat deterioration of the sealing material, the furnace shell is generally cool with water cooling or air cooling. The sealing furnace furnace shell. According stove use, the chamber with internal heating elements of different types, such as resistors, induction coils, electrodes, and an electron gun and so on. Metal smelting furnace built with vacuum furnace crucible, some also equipped with automatic pouring device and the loading and unloading of robots. Vacuum system consists of vacuum pumps, vacuum valves and vacuum gauges and other components.
Vacuum furnace by heating element into the vacuum resistance furnace, vacuum induction furnaces, vacuum arc furnace, vacuum consumable arc, electron beam furnace (also known as electron bombardment furnace) and a plasma furnace.
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