Generally, the inner and outer rings and rolling bodies are made of rolling bearing steel, such as conventional materials such as GCr 15, GCr9, GCr 15SiMn, and the heat treatment is usually quenching+low temperature tempering. Large bearings need carburized steel, such as 20CrMnTi, 18Cr2Ni4WA and other materials, and the heat treatment adopts carburization+quenching+low temperature tempering. Martensite stainless steel, such as 9Cr 18, 9Cr 18Mo, is usually used for bearings in corrosion-resistant environment. And carrying out low-temperature quenching and tempering heat treatment. The bearings in high-temperature environment are made of heat-resistant steel or high-speed steel, such as W 18Cr4V, W6Mo5Cr4V2, etc. And quenching and tempering at high temperature for heat treatment.