Plane spherical bearings will be subjected to fatigue load under the action of cyclic load during the operation. It is easy to cause fatigue damage, that is, cracking and spalling, which is an important damage situation of the bearing. Therefore, in order to improve the service life of the bearing, the bearing steel must have a high contact fatigue strength.
When the spherical bearing is in operation, not only the rolling friction between the ferrule, the rolling element and the maintenance frame occurs, but also the sliding friction occurs, so that the bearing parts are always worn. In order to increase the wear of the bearing parts, maintain the bearing accuracy and stability, and extend the service life, the bearing steel should have good wear resistance.
The hardness of a spherical bearing is one of the important qualities of bearing quality. It will have an indirect effect on the fatigue strength, wear resistance and elastic limit of the contact. The hardness of the bearing steel in the application condition must reach HRC61~65. The ability to achieve high contact fatigue strength and wear resistance.
In order to avoid the corrosion and rust of bearing parts and finished products during processing, storage and operation, plane spherical bearings are required to have good anti-rust performance. In the course of consumption, bearing parts have to go through many cold and hot processing steps. In order to satisfy the request of small amount, high efficiency and high quality, bearing steel should have good processing performance.