Vacuum furnace, that is, in the specific space of the furnace chamber, the vacuum system (carefully assembled by vacuum pump, vacuum measuring device, vacuum valve and other components) is used to discharge part of the substances in the furnace chamber, so that the pressure in the furnace chamber is less than a standard atmospheric pressure, and the space in the furnace chamber is used to achieve a vacuum state, which is a vacuum furnace.
A vacuum furnace is a device that heats up in a vacuum environment. The furnace chamber is piped to the high vacuum pump system in a furnace sealed with a metal or quartz glass cover. The vacuum degree of the furnace can reach 133×(10-2~10-4)Pa. The heating system in the furnace can be directly heated by electrical heating of resistance furnace wire (such as tungsten wire), or it can be heated by high-frequency induction. The maximum temperature can reach about 3000°C. It is mainly used for ceramic firing, vacuum smelting, degassing and annealing of electric vacuum parts, brazing of metal parts, and ceramic-metal sealing.
