1. The influence of materials; In the aspect of bearing material technology, mainly through material selection, material guarantee and heat treatment and other means, to ensure the improvement of bearing life. Rolling bearings are generally made of high-carbon chromium bearing steel with almost unchanged chemical composition. However, different smelting methods of material purity is different, the impact on the life of the same contact should be...

 

2. Influence of surface roughness; Fatigue cracks usually originate from the surface, so the surface has a great influence on the life of parts. The smoother the surface is, the longer the initiation time of fatigue crack is. Rolling bearing The surface treatment technology of the rolling body and the ring can change the hardness of the surface of the rolling body, the distribution of residual stress and the overall strength of the material, thus improving the bearing life.

 

3. The influence of temperature; The influence of temperature: neither the fatigue model based on the stress under the surface nor the model starting from the defect on the surface takes into account the influence of the heating in the contact zone of the bearing on the fatigue life