heat-treatment process

The cut surface of the sample cut by wire cutting is relatively smooth, which is more conducive to grinding the plane and observing the metallography.

Quenching is one of the most important processes during the assembly of wheel hub bearingsThe purpose of induction heat treatment (induction quenching and tempering) is to harden the surface layer of mechanical parts, which can improve the wear resistance and other mechanical properties (especially fatigue strength) of mechanical parts.Induction heat treatment uses high-frequency to inductively heat the parts, the surface layer of the parts rapidly rises to the quenching temperature, and then rapidly cools with quenching medium to make the surface layer be hardened.

Hardness indicates a material's ability to resist hard objects being pressed into its surface. It is one of the important performance indexes of metal materials. Generally, the higher the hardness, the better the wear resistance.The hardness of Vickers (HV) is obtained by dividing the load value by the surface area of the indentation pits of the material by the diamond square cone impinger with a maximum load of 120kg and a top Angle of 136°.