Characteristics of bearing steel: 1. Contact fatigue st […]
Characteristics of bearing steel:
1. Contact fatigue strength
Bearings are exposed to fatigue easily by contact with the surface under the action of periodic load, that is, cracking and flaking, which is an important situation of bearing damage. Therefore, in order to improve the service life of bearings, bearing steel must have a high contact fatigue strength.
2. Wear resistance
During the bearing task, not only rolling friction but also sliding friction occurs between the ring, rolling element and the cage, so that the bearing parts are constantly worn. In order to increase the wear of bearing parts, maintain the stability of bearing accuracy and extend the service life, bearing steel should have good wear resistance.
Hardness is one of the important qualities of bearing quality, and it has an indirect effect on contact fatigue strength, wear resistance and elastic limit. The hardness of bearing steel under application conditions must reach HRC61~65 individually, and the ability to achieve high contact fatigue strength and wear resistance of the bearing.
4. Anti-rust performance
In order to avoid erosion and rusting of bearing parts and finished products in the process of processing, storage and use, it is requested that bearing steel should have good anti-rust properties.
5. Processing performance
In the course of consumption, bearing parts have to go through many cold and hot processing procedures. In order to meet the requirements of small quantity, high efficiency and high quality, bearing steel should have good processing performance. For example, cold and hot forming performance, cutting performance, hardenability, etc.