What is the purpose of bearing heat treatment?

Hello, I think bearing heat treatment is a key processing step to improve the intrinsic quality of bearings. The main purpose is to transform the material structure through heat treatment and improve the mechanical properties of the material, thereby effectively improving the wear resistance and toughness of the bearing. , extend the service life of bearings.

Bearing heat treatment refers to a metal heat treatment process that heats the entire workpiece and then cools it at an appropriate speed to change its overall mechanical properties. When it comes to heat treatment, we have to mention the "four fires" of industry, namely annealing, normalizing, quenching, and tempering. These are the four basic processes in heat treatment. Among them, quenching and tempering are closely related and are often used together. Not even one.

The general temperature for bearing heating is 80°C~100°C. When the inner diameter of the bearing is greater than 70mm, or the fit interference is large, heating is generally used to expand the inner hole of the bearing and then heat-sleeved. Bearings are generally heated to 80°C and up to 100°C. Exceeding 120°C will cause tempering in the bearing, which will reduce the hardness and precision of the bearing ring and affect the service life of the bearing. The heating temperature can also be calculated and determined based on the assembly environment temperature, bearing material, fitting diameter, interference amount and the minimum gap of thermal assembly. ?