NEWS： GCr15 bearing steel chemical composition

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Bearing steel chemical composition is mainly carbon, chromium, silicon, manganese, nickel, molybdenum, vanadium.
impact of a carbon
In addition to hardened steel, carbon steel bearings in general 0.951.15%, below hypereutectoid ingredients. So after quenching and tempering can get high hardness, high contact fatigue strength and wear resistance. In order to form a sufficient carbides to increase the wear resistance, the carbon content is too low, but the high carbon content increases carbide inhomogeneity and will form a network to reduce the mechanical properties of carbide.
Effect of alloying elements b
Chromium is the main chemical composition of bearing steel, chromium can improve the hardenability, reduced tendency to overheat, improve tempering stability. Silicon, manganese major increase in bearing steel hardenability. Nickel carburizing bearing steel make steel improved toughness and ductility, nickel steel can improve the sensitivity of the fatigue resistance and reduced steel for Gap. Molybdenum in steel can improve the hardenability and heat resistance, prevent temper brittleness, increased corrosion resistance in certain media. Vanadium increase in bearing strength and yield ratio of steel, in particular to improve the proportional limit and the elastic limit, to reduce the sensitivity of the decarburization heat treatment to improve the surface quality, chrome-vanadium bearing steel, carbide dispersion and high performance good

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