What is self-lubricating bearing steel sleeve

Bearing steel is used to make the balls, rollers and bearing rings of steel. Bearing under immense pressure and friction in the job, so the demand bearing steel has high and uniform hardness and wear resistance, and high elastic limit. The chemical composition of bearing steel uniformity, content and distribution of non-metallic inclusions, carbides and other needs are spread very severe, it is one of the most stringent of all steel produced in steel demand. ISO 1976 international standardization will arrange some general bearing steel classified as international norms, the bearing steel is divided into: full hardenability type bearing steel, hardened outer bearing steel, stainless steel bearings, high temperature bearing steel and other four categories 17 a steel. Some countries add a category for the special use of bearing steel or alloy. Bearing steel China has been classified as standard classification scheme is similar to ISO, respectively corresponding to the high carbon chromium bearing steel, carburizing bearing steel, corrosion resistant stainless steel bearings, high temperature bearing steel four categories. Nearly five decades China still bearing steel and bearing steel materials aspects, such as chromium-bearing steel, carbon steel bearing, particularly useful bearing steel and alloys, metal ceramics and achieved great development. Carbon chromium bearing steel GCr15 is the largest output of bearing steel, carbon Wc international level to about 1%, chromium content Wcr is about 1.5 percent, from 100 years since its inception in 1901, did not change the main ingredient, followed by science forward, any technology research work continues, continuously improve product quality, accounting for more than 80% of the total production of the international steel bearings. Today, we say that if there is no particular bearing steel clarified, that means GCr15.