Basic requirements for rolling bearing steel:

And contact fatigue strength, bearing under the action of the load cycle, the contact surface is prone to fatigue failure, spalling, which is bearing the main form of damage. Therefore, in order to improve the service life of the bearing, bearing steel must have a high level of contact fatigue strength.

Second, wear resistance, bearings, rings, rolling body and adhere to the frame not only rolling friction, and sliding friction, so that the bearing parts from time to time to wear. In order to reduce the bearing parts wear, adhere to the stability of the bearing accuracy, prolong the service life, bearing steel has good wear resistance.

Three, hardness, hardness is one of the important quality of the quality of the bearing, has direct effect on the contact fatigue strength, wear resistance, the elastic limit. Bearing steel in the use of the hardness is generally reached HRC61~65 ability of bearing high contact fatigue strength and wear resistance.

Fourth, antirust performance, in order to prevent the bearing parts and finished products in the processing, storage and use process is rust corrosion, the requirements of bearing steel has good rust resistance.

Five, processing performance, bearing parts in the production process to through a lot of cold and hot working process, in order to meet the high volume, high efficiency and high quality requirements, bearing steel has good processing properties. For example, the cold and hot forming properties, machinability and hardenability etc..

Bearing steel in addition to the basic requirements, but also to chemical composition is appropriate, and the internal organization uniform, non metallic inclusions are fewer, internal defect in appearance conforms to the norms and surface decarburization layer does not exceed the prescribed concentration requirements, these items in the specification of raw materials have clearly defined.

Main bearing parts commonly used materials: high carbon chromium bearing steel, Shen Tangang (such as 20Cr2Ni4A 15Mn20Cr2MnMoA high temperature bearing steel (such as Cr4Mo4VCr14Mo4Cr15Mo4VW18Cr4V stainless bearing steel (9Cr189Cr18Mo1Cr18Ni9Ti steel vacuum degassing, antimagnetic bearing steel and so on, which is the most commonly used high carbon chromium bearing steel. High carbon chromium bearing steel ganghao have manufacturing GCr6GCr9GCr9SiMnGCr15GCr15SiMn Chinese bearing industry the most widely used, the largest amount of steel, with good wear resistance and contact fatigue performance and processing performance of the ideal, have certain elasticity and toughness.