Vacuum gas quenching is the process of heating the workpiece under vacuum, and then cooling it quickly in the cooling gas with high pressure and high flow rate, so as to improve the surface hardness of the workpiece.
Compared with ordinary gas quenching, oil quenching and salt bath quenching, vacuum high-pressure gas quenching has obvious advantages: good surface quality, no oxidation and no carburization; Good quenching uniformity and small workpiece deformation; Good controllability of quenching strength and controllable cooling rate; High productivity, saving the cleaning work after quenching; No environmental pollution.