There are three important reasons for bearing steel ball cracking

There are three important reasons for bearing steel ball cracking

1. The bearing steel ball is cracked during the whole operation process after being installed in the rolling bearing, and the cracking direction is the direction of raw material cold rolling.

2. There are obvious loose impurities in the core of the bearing steel ball, the strip cementite exceeds the standard, and the surface contains oxygen, calcium, magnesium and other abnormal elements. In addition, the depth of the mixed belt is about 0.25mm, and then it is determined that there is residual shrinkage porosity in the core of the bearing steel ball, which is a defect in the steel industry. This is also an important reason for the cracking of the bearing steel ball in the whole process of application.

3. The quenching heat treatment structure of bearing steel ball is overheated, which makes its ductility expand, reduces the compressive strength, and makes the bearing steel ball easier to crack.