The half shaft is an important part of the car. The half shaft is the shaft that transmits torque between the gearbox reducer and the drive wheel. There is a universal joint at the inner and outer ends of the drive shaft, respectively, through the splines on the universal joint and the reducer gear and hub. Bearing inner ring connection. The half shaft has to bear huge friction during work, so the half shaft is generally required to have high hardness, wear resistance and service life. Now, medium frequency induction heating power supply is mostly used for half-shaft quenching. This is mainly based on its workpiece specifications, depth of hardened layer and processing volume. The half-shaft is quenched by medium-frequency induction heating power supply, which has a fast heating speed, and the quenching heat treatment of a half-shaft can be completed in about ten seconds. It has the advantages of large compressive internal stress and high fatigue resistance of the workpiece, so it is loved by everyone.