About bearing steels for production of alloy steel shot and grit

- Apr 20, 2018 -

Bearing steel is also known as high carbon chromium steel, with a carbon content of about 1%, and chromium content of Wcr is 0.5% to 1.65%.The bearing steel is divided into six categories: high carbon chromium bearing steel, non-chromium bearing steel, carburizing bearing steel, stainless bearing steel, medium high temperature bearing steel and anti-magnetic bearing steel.


High carbon chromium bearing steel GCr15 is the world's largest production of bearing steel, carbon Wc is approximately 1%, Wcr chromium content is approximately 1.5%, since 1901 more than 100 years, the main composition is basic has not changed, with the progress of science and technology, the research work on, continuously improve product quality, accounting for over 80% of the total world bearing steel production.If there is no special explanation for bearing steel, it is GCr15.The good materials for alloy steel shot and grit.bearing steels.jpg


Our country has produced high carbon chromium stainless bearing steel, the main steel number is 9Cr18;Carburized bearing steel, the main steel number has G20CrMo;Chromium bearing steel, main steel number has GCr15.


The bearing steel is divided into full hardened bearing steel, carburized bearing steel, stainless bearing steel and high temperature bearing steel according to chemical composition, performance, processing technology and use.All hardened bearing steel is mainly high carbon chromium steel, such as GCr15, with about 1% carbon content and about 1.5% chromium content.In order to improve hardness, wear resistance and hardenability, add some silicon, manganese, molybdenum, etc., such as GCr15SiMn.This type of bearing steel production is the largest, accounting for more than 95% of all bearing steel output.Carburizing bearing steel is 0.08 ~ 0.23% carbon content of chromium, nickel, molybdenum alloy structural steel, made of bearing parts after surface of carbonitriding, to increase the hardness and wear resistance, the steel used in the manufacture of large bear strong impact load bearing, such as a large rolling mill bearing, auto bearing, mill bearing and railway vehicle shaft bearing, etc.Stainless bearing steel has high carbon chromium stainless steel bearing steel, such as 9Cr18, 9Cr18MoV, etc., and medium carbon chromium stainless bearing steel, such as 4Cr13, etc., used in the production of non-rust corrosion-resistant bearings.High temperature shaft ChengGang is under high temperature (300 ~ 500 ℃), use requirements of steel in the use of temperature has certain red hardness and wear resistance, high speed tool steel is chosen mostly substitute, such as W18Cr4V, W9Cr4V, W6Mo5Cr4V2, Cr14Mo4 and Cr4Mo4V, etc.


Bearing steel is used in the manufacture of rolling bearings, roller and sleeve and other types of steel, also can be used in the production of precision measuring tool, cold stamping dies, machine screw, such as punching die, measuring tool, tap and diesel engine oil pump precision matching parts, steel shot and steel grit.Bearing steel is used for making ball bearings, roller bearings and bearing rings.

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