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Q: What are the grades, characteristics and uses of commonly used carburizing bearing steels?

Q: What are the grades, characteristics and uses of commonly used carburizing bearing steels?

Update Time:2021/7/9
Bearing steel grade Feature Application
G20CrMo Low alloy carburized steel, the surface hardness after carburizing is relatively
High, good wear resistance, low core hardness, toughness
it is good. Suitable for making bearings resistant to impact loads and
Parts. 
It is often used as the impact resistance of cars and tractors.
Impact load roller bearings, also used as steam
Car gears, piston rods, bolts, etc. 
G20CrNiMo Have good plasticity, toughness, and strength, carburizing or
After carbonitriding, the surface has quite high hardness and resistance
Good grind ability, contact fatigue life is obviously better than
GCr15 steel, the core carbon content is low, there is enough
Toughness to withstand impact loads. 
Good material for making impact-resistant bearings
Material, which can be used as steam to withstand impact load
Car bearings and small and medium-sized bearings are also available
Make automobile, tractor gears, and cone drills
The claws and cones of the head. 
G20CrNi2Mo After carburizing, the surface hardness is high, the wear resistance is good, and it has
Moderate surface hardening, good heart toughness, and resistance
Impact 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 loads
Bearings, such as railway freight car bearing rings and
Rollers, also used as car gears and pistons
Rods, 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-scale
Roller 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 and
High contact fatigue strength, good heart toughness, and resistance
Strong impact load. Medium weldability, with tempering
Tendency 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 other
Large carburized parts, such as large gears, shafts
Etc., it can also be used for manufacturing requirements of toughness
High tempered parts. 
G20Cr2Mn2MoA After carburizing, the surface hardness is high, the core toughness is good, and it can be
Resistant to strong impact load, phase with G20Cr2Ni4A
Compared with the carburizing speed, the carburized layer is easier to form a coarse
Large carbides are not easy to diffuse and eliminate. 
Used to work under high impact load conditions
Extra-large and medium-sized bearing parts and shafts
And gears, etc.