Vacuum Furnace Degassing Principle
Vacuum furnace is a kind of equipment for heating in vacuum environment. In the special space of the furnace chamber, some substances in the furnace chamber are discharged by the vacuum system (which is carefully assembled by vacuum pumps, vacuum measuring devices, vacuum valves, etc.), so that the pressure in the furnace chamber is less than a standard atmospheric pressure. The vacuum state is realized by the space in the furnace chamber. It is mainly used for ceramic firing, vacuum smelting, degassing of electric vacuum parts, annealing and brazing of metal parts. Welding, ceramics, metal seals, etc.
vacuum furnaces Classification:
Vacuum furnace can be divided into vacuum quenching furnace, vacuum brazing furnace, vacuum annealing furnace, vacuum magnetizing furnace, vacuum tempering furnace, vacuum sintering furnace, vacuum diffusion welding furnace, vacuum carburizing furnace and so on.
Vacuum Furnace Degassing Principle:
Degassing is a phenomenon of slow evaporation of materials in vacuum, which is the main problem in vacuum performance. Molecular layers formed by accumulation of gases and liquids may adhere to the surface of any solid material. As the pressure decreases, these layers evaporate gradually, because the energy of these surfaces is less than that of vacuum. Nitrogen, volatile solvents and inert gases degasse faster, oil and water vapor will continue to adhere to the surface, several hours before evaporation. Porous materials, dust particles and other natural materials will increase the surface area, so it is possible to cause more degassing. Radiation and temperature provide enough energy to detach the absorbed molecules from the surface. The molecule adhering to the surface at low temperature can be released when the furnace temperature rises. Therefore, with the increase of furnace temperature, degassing phenomenon will gradually increase.
vacuum furnace technical characteristics :
Vacuum furnace, as the booster of industrial production, is the equipment chosen by every producer. It has its own characteristics, and environmental protection vacuum furnace is no exception.
1. Strict vacuum sealing ensures the tightness of the environment-friendly vacuum furnace and further treats the parts.
2. Water-cooling device, shell of environment-friendly vacuum furnace, heat insulation of intermediate vacuum and other components, all work in vacuum and heating state.
3. Choose low voltage and high current, and the working voltage of the heating element of the heat treatment furnace should not exceed 80-100 volts. High temperature vacuum furnace.
The characteristics of vacuum furnace are built for the demand of production. It belongs to the equipment and acts on it. In order to maximize the production value, it is necessary to deal with these characteristics.