Abstract: In order to solve the problem of severe distortion of the SAE5120 steel bearing ring after carburizing and quenching, an induction fixture hardening process was carried out. The results show that, compared with conventional carburizing and hardening, the surface and core martensite of the bearing ring are refined, the hardness is increased, and the distortion of the bearing ring is significantly reduced. It is possible to reduce the grinding allowance, save the production cost and improve the production efficiency.

Key words: bearing ring, carburizing, fixture hardening, distortion, grinding allowance