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Features of bearing steel:

I. Contact fatigue strength

Bearing in the role of periodic load, contact surface is very easy to attack fatigue damage, that is, the emergence of crack spalling, which is an important failure of the bearing situation. Therefore, in order to improve the service life of bearings, bearing steel must have a high contact fatigue strength.

Ii. Wear resistance

Bearing tasks, between the ring, the rolling body and the maintenance frame not only attack rolling friction, but also attack sliding friction, so that the bearing parts have been wear. In order to increase the wear of bearing parts, maintain the stability of bearing precision and extend the service life, bearing steel should have good wear resistance.

Three, hardness

Hardness is one of the important qualities of bearing quality, which has indirect influence on contact fatigue strength, wear resistance and elastic limit. Bearing steel in the use of the state of the hardness of individual to reach HRC61~65, the ability to make the bearing to obtain higher contact fatigue strength and wear resistance.

Four, anti-rust performance

In order to avoid the bearing parts and finished products being corroded and rusted in the process of processing, storing and using, the bearing steel should have good anti-rust performance.

5. Machining performance

Bearing parts in the consumption process, to go through many cold, hot processing procedures, in order to satisfy the requirements of a small amount, high efficiency, high quality, bearing steel should have good processing performance. For example, cold and hot forming performance, cutting performance, hardenability, and so on.

In addition to the above basic requirements, the bearing steel should also reach the requirements of appropriate chemical composition, average external organization, less nonmetallic adulterants, external defects in conformity with the specification and external decarburization layer does not exceed the regular concentration.