1. Advantages of vacuum heat treatment Vacuum heat treatment is a non-oxidative heat treatment technology with a wide application range and controllable atmosphere. It is also one of the main indicators of the current advanced level of heat treatment production technology. Vacuum heat treatment not only achieves non-oxidation and decarburization of steel parts, but also achieves pollution-free production and less distortion of the workpiece, so it is also a clean and precision production technology. At present, it has become an irreplaceable advanced technology in the production of tool and die.