Q: What are the grades, characteristics and uses of commonly used carburizing bearing steels?
Bearing steel grade Feature Application G20CrMo Low alloy carburized steel, the surface hardness after carburizing is relativelyHigh, good wear resistance, low core hardness, toughnessit is good. Suitable for making bearings resistant to impact loads andParts. It is often used as the impact resistance of cars and tractors.Impact load roller bearings, also used as steamCar gears, piston rods, bolts, etc. G20CrNiMo Have good plasticity, toughness, and strength, carburizing orAfter carbonitriding, the surface has quite high hardness and resistanceGood grind ability, contact fatigue life is obviously better thanGCr15 steel, the core carbon content is low, there is enoughToughness to withstand impact loads. Good material for making impact-resistant bearingsMaterial, which can be used as steam to withstand impact loadCar bearings and small and medium-sized bearings are also availableMake automobile, tractor gears, and cone drillsThe claws and cones of the head. G20CrNi2Mo After carburizing, the surface hardness is high, the wear resistance is good, and it hasModerate surface hardening, good heart toughness, and resistanceImpact load, the cold and hot working plasticity of steel is better,It can be processed into rods, plates, strips, and seamless steel pipes. Rollers used to withstand higher impact loadsBearings, such as railway freight car bearing rings andRollers, also used as car gears and pistonsRods, universal joint shafts, and round head bolts, etc. G10CrNi3Mo After carburizing, the surface has high carbon content and high hardness,Good wear resistance, the low carbon content in the heart, good toughness,Can withstand impact loads. Used for large-scaleRoller bearings. Such as rolling mill bearings. G20Cr2Ni4A Common carburized structural steel is used to make bearings.The carbon back surface has quite high hardness, wear-resistance andHigh contact fatigue strength, good heart toughness, and resistanceStrong impact load. Medium weldability, with temperingTendency to brittleness, more sensitive to the formation of white spots. Making large bearings resistant to impact loads,Such as rolling mill bearings, etc., but also used for otherLarge carburized parts, such as large gears, shaftsEtc., it can also be used for manufacturing requirements of toughnessHigh tempered parts. G20Cr2Mn2MoA After carburizing, the surface hardness is high, the core toughness is good, and it can beResistant to strong impact load, phase with G20Cr2Ni4ACompared with the carburizing speed, the carburized layer is easier to form a coarseLarge carbides are not easy to diffuse and eliminate. Used to work under high impact load conditionsExtra-large and medium-sized bearing parts and shaftsAnd gears, etc.