The mirror glass mold material is not only a problem of composition, but also a series of advanced processes such as vacuum pump degassing, argon maintenance casting, vertical rolling, soft forging, etc. are required in the precision mold manufacturing smelter to make the mirror glass mold steel. It has a series of advantages such as few internal defects, fine particle size distribution of residues, high diffusion level, fine grain size of metal materials, and good uniformity in precision mold manufacturing, so as to meet the requirements of mold steel that is polished to mirror glass. The metal surface treatment technology of mold parts is to change the shape, composition, organizational structure and ground stress of the surface layer of precision-machined mold parts according to the surface coating, surface modification materials or composite solution technology, so as to obtain the required surface characteristics. control. The high-frequency quenching process includes gas high-frequency quenching, positive ion high-frequency quenching, liquid high-frequency quenching and other methods. In each high-frequency quenching method, there are several high-frequency quenching techniques, which can be integrated into different steel grades. The same as the provisions of the product workpiece. From the method of automobile accessories on the metal surface, it can be divided into: organic chemical method, physical method, physical method and mechanical equipment method.