Construction and application of vacuum furnace
structure
The vacuum furnace is generally composed of a main engine, a furnace, an electrothermal device, a sealed furnace shell, a vacuum system, a power supply system, a temperature control system and an outside conveyor. The sealed shell is welded with carbon steel or stainless steel, and the joint surface of the detachable part is sealed by vacuum sealing material. In order to prevent the deformation of the shell after heating and the deterioration of the sealing material, the furnace shell is usually cooled by water cooling or air cooling. The furnace is located in the sealed furnace shell. According to the use of the furnace, the furnace is equipped with different types of heating elements, such as resistance, induction coil, electrode and electron gun. The vacuum furnace for smelting metals is equipped with a crucible, and some are equipped with automatic pouring devices and manipulators for loading and unloading materials. The vacuum system is mainly composed of vacuum pump, vacuum valve and vacuum gauge.
application
Vacuum furnace is a special space in the furnace chamber using vacuum system (by vacuum pumps, vacuum measuring devices, vacuum valves and other components assembled carefully) to discharge some of the material inside the furnace chamber, so that the pressure in the furnace chamber is less than a standard atmospheric pressure, the space in the furnace chamber to achieve a vacuum state. What is the application of vacuum furnace in heat treatment?
Vacuum furnace can not only be used for quenching, tempering, annealing and normalizing of common workpieces, but also for chemical heat treatment such as vacuum carburizing (including vacuum carbonitriding), vacuum ion carburizing and glow plasma nitriding. It can also be used for sintering, brazing and vacuum coating of metals. It has the advantages of clean and bright surface, less consumption of gas and gas source.
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