What are the requirements for stainless steel bearings for steel quality?

Update:01-06-2020
Summary:

Stainless steel bearings have been used in more and more industries, so there are more and more kinds of stainless steel bearings on the market. Many customers think that as long as they are stainless steel bearings, they are the same, but it is not true. The difference between good and bad is very large, which is very related to the steel used in stainless steel bearings. When producing stainless steel bearings, the characteristics that stainless steel bearings should have should be considered. Therefore, in the manufacturing process, for the The quality requirements of steel used are much stricter than that of ordinary industrial steel, mainly including the following three aspects:
First, the materials of stainless steel bearings have strict chemical composition requirements. Normally, the steel used for stainless steel bearings is mainly high-carbon chromium stainless steel. Only by strictly controlling the chemical composition of stainless steel can its organizational performance and hardness be guaranteed.
Secondly, the dimensional accuracy of the stainless steel bearing steel, the stainless steel bearing ring is generally forged, if the dimensional accuracy is insufficient, it is difficult to calculate the blank size and weight very accurately, so that the quality of the stainless steel bearing parts May cause damage to equipment or mold.
Third, the purity of stainless steel bearing materials, under normal circumstances, if there are many impurities in stainless steel bearings, it will seriously affect its service life. Therefore, if you want to ensure the service life and reliability of the bearing, you must reduce the content of non-metallic inclusions in the steel as much as possible.
In addition, there are actually many other requirements. Among these requirements, one of them is the requirement for the decarburized layer on the surface of steel. Normally, if the decarburized layer on the surface of the steel exceeds the specified range, it should be removed before heat treatment, otherwise it will lead to scrapping of stainless steel bearing parts.