A vacuum furnace is a equipment for heating or melting in a near-vacuum environment. It mainly includes vacuum melting furnace and vacuum heat treatment furnace.

The vacuum melting furnace can melt metals and alloys under vacuum conditions, and can produce high-performance superalloys such as special alloys and high-quality steel, as well as rare metals, refractory metals, and rare earth metals that cannot be produced by atmospheric melting.

Vacuum heat treatment furnace refers to an industrial furnace in which all or part of the heat treatment process is carried out in a vacuum state. Vacuum heat treatment can realize almost all heat treatment processes, such as vacuum sintering, bright quenching, vacuum welding, vacuum brazing, Vacuum quenching, vacuum tempering, etc.

Compared with conventional heat treatment, the quality of the workpiece through vacuum heat treatment is greatly improved. Vacuum heat treatment can achieve no oxidation, no decarburization, no carburization, can remove phosphorus chips on the surface of the workpiece, and has the functions of degreasing and degassing, so as to achieve a bright surface.