The materials used in tapered roller bearings are mainly considered to have high hardness, contact fatigue strength, good wear resistance and impact toughness. It is generally made of high carbon chromium steel. Such as GCr15, GCr15SiMn, GCr18Mo, G20CrNiMo, G20Cr2Ni4A.
1. GCr15: Good overall performance. After quenching and tempering, the hardness is high and uniform, and the wear resistance and contact fatigue resistance are high. Good performance on machining.
Application: Small and medium tapered roller bearings.
Automobile hubs, reducers, machine tools, dryer stop wheels, rotary drives, gearboxes, column return winches, two-speed multi-purpose winches, general machinery, etc.
2. GCr15SiMn: GCr15SiMn steel is a modified steel that appropriately increases the content of silicon and manganese on the basis of GCr15. It has good harden ability, wear resistance, and elastic limit, with better wear resistance than GCr15.
Application: Larger and medium-sized tapered roller bearings.
Cold rolling mill rolls, worm reducers, ZD series reducers, column winches, dual speed multi-purpose winches, shunting winches, etc.
3. GCr18Mo: It is a new type of high hardenability bearing steel, belonging to the high carbon chromium bearing steel series. Compared with GCr15 and GCr15SiMn, the chromium content is increased, appropriate molybdenum is added, and the lower bainite isothermal quenching heat treatment process is used to obtain the lower bainite structure and higher residual austenite content, with higher impact toughness and fracture toughness.
Application: Large and medium-sized single row, double row, and four row tapered roller bearings .
Cold rolling mill rolls, high-speed rail wheels, gear reducers, etc.
4. G20CrNiMo: It is an alloy carburized steel. After carburization treatment, the surface has a relatively high hardness, wear resistance, and contact fatigue strength, while retaining good toughness at the core, which can withstand high impact loads. Good hardenability and high strength.
Application: Medium to large double row, four row tapered roller bearings.
Rolling mill rolls, vertical mills, railway bearings, etc.
5. G20Cr2Ni4A: It is a high-quality alloy carburized steel with high surface hardness, wear resistance, and contact fatigue strength after carburization treatment. At the same time, it retains good toughness at the core and can withstand high impact loads. G20Cr2Ni4A material is superior to G20CrNiMo material.
Application: Large four row tapered roller bearings.
Steel rolling mill rolls, vertical mills, railway bearings, etc.
Post time: Apr-24-2023