Bearing steel is high carbon chromium steel. Because bearing steel is mainly used to make balls, bearing rings, etc., the requirements for the material itself are very high. First, it must have sufficient hardness and wear resistance to ensure the service life of the material. Secondly, the chemical composition distribution of the bearing steel It must be uniform, so as to ensure the physical properties of the material, and finally the dimensional accuracy of the product, which must fully comply with the standards for better application.

Bearing steel is the steel used to make balls, rollers and bearing rings. Bearing steel has high and uniform hardness and wear resistance, as well as high elastic limit. The requirements for the uniformity of the chemical composition of bearing steel, the content and distribution of non-metallic inclusions, and the distribution of carbides are very strict. It is one of the most stringent steel types in all steel production. In 1976, the International Organization for Standardization ISO incorporated some common bearing steel grades into international standards and divided bearing steel into four categories: fully hardened bearing steel, surface hardened bearing steel, stainless bearing steel, and high-temperature bearing steel, with a total of 17 categories steel number.
Bearing steel is high-purity iron-carbon alloy steel!
Bearing steel is mainly used to manufacture rolling elements and rings of rolling bearings. Since bearings should have characteristics such as long life, high precision, low heat generation, high speed, high rigidity, low noise, and high wear resistance, the bearing steel is required to have: high hardness, uniform hardness, high elastic limit, and high contact fatigue strength, necessary toughness, certain hardenability, and corrosion resistance in atmospheric lubricants. In order to achieve the above performance requirements, strict requirements are imposed on the uniformity of chemical composition, content and type of non-metallic inclusions, carbide particle size and distribution, and decarburization of bearing steel. Bearing steel is generally developing towards high quality, high performance and multiple varieties. Bearing steel is divided into high carbon chromium bearing steel, carburized bearing steel, high temperature bearing steel, stainless bearing steel and special special bearing materials according to characteristics and application environment.

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