Large vacuum furnace is a kind of equipment used for heat treatment of materials, and its working principle is to use the vacuum environment to control the heat treatment process of metal materials. By reducing oxygen and other impurities in the air, the vacuum furnace can effectively prevent material surface oxidation, making the heat treatment more uniform and stable.

Large vacuum furnace usually consists of furnace body, vacuum system, heating system, control system and other parts. Furnace body is the main part of the vacuum furnace, usually made of high-temperature alloy steel, able to withstand high temperature and vacuum environment. The vacuum system is mainly responsible for maintaining the vacuum in the processing chamber, usually using mechanical pumps, molecular pumps and other equipment to achieve vacuum extraction, and through the gas condensation tank to remove water vapor and harmful gases in the gas.

The heating system is the key part of a large vacuum furnace, which is used to heat the metal material to the required temperature. Common heating methods include resistance heating, induction heating, etc. Different heating methods are selected according to the nature of the material and processing requirements. The control system is responsible for monitoring and regulating the temperature, vacuum level and other parameters in the furnace, and realizing the precise control of the heat treatment process through the preset program.

In the working process, the large vacuum furnace firstly extracts the gas in the processing chamber through the vacuum system to create a high degree of vacuum environment. Then the metal material is heated to the required temperature through the heating system, insulated and held according to the process requirements, and finally cooled to room temperature through the cooling system. The whole heat treatment process is carried out in a high vacuum environment, which effectively reduces the influence of oxidation and pollution, and makes the performance of metal materials effectively improved.

In general, large vacuum furnace plays an important role in the heat treatment process of metal materials, through the control of the vacuum environment and heating mode, to realize the precise heat treatment of the material, improve the performance and quality of the material. It is widely used in aerospace, automobile manufacturing, electronics industry and other fields, which brings convenience and benefits to industrial production.