Precision bearing steel balls will be subjected to certain impact loads during the process of use. To a certain extent, the bearing steels are required to have certain toughness to ensure that the bearings are not damaged by impact. For bearings bearing large impact loads such as rolling mill bearings, railway bearings, etc., materials require relatively high impact toughness and fracture toughness. Some of these bearings are subjected to bainite quenching heat treatment, and some are made of carburized steel. Ensure that these bearings have good impact toughness.
The precision mechanical parts of precision bearing steel balls are measured in micrometers. During long-term storage and use, changes in bearing size or stress changes may cause changes in bearing size, resulting in loss of precision in the bearing. Therefore, in order to ensure the dimensional accuracy of the bearing, the bearing steel should have good dimensional stability.
Precision bearing steel ball has many production processes and long production cycle. Some semi-finished or finished parts need to be stored for a long time before assembly. Therefore, bearing parts are prone to occur in the production process or in the preservation of finished products. Corrosion, especially in humid air. Therefore, bearing steel is required to have good rust prevention performance.
Hardness is one of the important indicators of rolling bearings. It has a close relationship with the fatigue strength, wear resistance and elastic limit of the material, which directly affects the life of the rolling bearing. The hardness of the bearing is usually determined according to the manner and size of the bearing bearing, the size of the bearing and the overall thickness of the wall. The hardness of the steel for rolling bearings should be appropriate. If the steel is too large or too small, it will affect the service life of the bearing.www.wxjnsteelball.com