From the application point of view, steel balls can be […]
From the application point of view, steel balls can be divided into wear-resistant steel balls used in the crushing industry and bearing steel balls used in the precision bearing industry. Among them, the quality of the bearing steel ball directly affects the service life of the bearing. With the development of the steel ball industry, more and more companies produce steel balls. The quality of steel balls on the market is also uneven. So how to judge the quality of a steel ball?
First of all, look at the appearance of the steel ball under the astigmatic light. Stainless Steel Ball The bearing steel ball is a high-precision product, and the corresponding surface finish is also very good. Therefore, the surface of the high-quality steel ball is usually brighter without scratches, bumps, or burns. , Rust spots and other surface defects.
Secondly, the grade of steel ball has strict requirements for spherical error, ball diameter variation, surface roughness, crushing load, metallographic structure and so on. Therefore, it is necessary to use professional instruments to test these items according to the corresponding standards GB/T308.1, ISO3290, etc.
According to the results of all inspection items, the grade of the steel ball can be determined, and the quality of the steel ball can be known.