The chemical components in bearing steel are mainly carbon, chromium, silicon, manganese, nickel, molybdenum, vanadium and the like. a carbon impact In addition to carburized steel, the general bearing steel has a carbon content of 0.951.15%, which is a hypereutectoid component. This results in high hardness, high contact fatigue strength and wear resistance after quenching and low temperature tempering. In order to form sufficient carbides to increase wear resistance, the carbon content cannot be too low, but too high a carbon content increases the carbide non-uniformity and forms a network carbide to lower the mechanical properties. b Effect of alloying elements Chromium is the main chemical component of bearing steel. Chromium can improve hardenability, reduce the tendency of overheating, and improve the stability of low temperature tempering. Silicon and manganese mainly improve hardenability in bearing steel. Nickel improves the toughness and ductility of steel in carburized bearing steel. Nickel can increase the resistance of steel to fatigue and reduce the sensitivity of steel to the notch. Molybdenum improves hardenability and heat strength in steel, prevents temper brittleness, and increases corrosion resistance in certain media. Vanadium improves strength and yield ratio in bearing steel, especially increases the ratio limit and elastic limit, reduces the decarburization sensitivity during heat treatment, thereby improving the surface quality, chromium-free vanadium-containing bearing steel, high carbide dispersion, and performance. good
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