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> Industry newsSelf-lubricating bearing steel sleeve
2016-01-22
Bearing steel is used to make steel ball bearing, roller and bearing ring.Bearing during operation is under great pressure and friction, so the demand bearing steel has high and even hardness and wear resistance, and high elastic limit.On the uniformity of the chemical composition of bearing steel, non-metallic inclusion content and distribute, the distribution of carbide and other requirements are very strict, is one of the most severe types of steel demand in steel production.International standardization arrangement of ISO 1976 will some common bearing steel grade in international norms, the bearing steel is divided into: the hardening type bearing steel, bearing steel, appearance sclerosis type, high temperature stainless bearing steel, bearing steel, etc, a total of 17 steel grade four class.Some countries are adding a category for special use of the bearing steel or alloy.China has been classified as specification of bearing steel classification method is similar to ISO, corresponding to the separation of high carbon chromium bearing steel, carburized bearing steel, corrosion resistant stainless bearing steel, high temperature bearing steel four categories.China is also in the last fifty years in terms of bearing steel and steel bearing with data, such as no chromium bearing steel, medium carbon steel bearing, special use bearing steel and alloy, metal, ceramic and so on has made great development.High carbon chromium bearing steel GCr15 is output in the world's largest bearing steel, carbon Wc is approximately 1%, Wcr chromium content is approximately 1.5%, since 1901 more than 100 years, the main composition is no changes, follow the progress of science and technology, the research work continues, continuously improve product quality, account for more than 80% of the bearing steel production capacity.So now, let's say bearing steel without special clarify, that means GCr15.