NSK bearing materials and the relationship between the performance

NSK bearings rolling ring and rolling body, one side repeatedly suffer high contact pressures, along with a sliding rolling contact. Maintain, on either side of the side with the ring and rolling body, or its one side sliding contact, a tension and contraction force. Consequently, for NSK bearing ring, rolling body and maintain information, performance, important request as follows. Ring, rolling body materials requested performance: rolling fatigue strength high hardness, high resistance to friction consumption to maintain the performance of the frame information requested: size stability good mechanical strength, moreover, also need good workability. Based on the use of different, and request the impact resistance, heat resistance, erosion resistance is good. Ring and rolling body materials: NSK bearing rings and rolling body usually use high carbon steel. Big local NSK bearings, using JIS SUJ2 steel grade. Large-scale use SUJ3 NSK bearings. In countries around the world, the chemical composition of SUJ2, NSK bearings as with data has been normalized. For example: with AISL52100 ( The United States) DIN100Cr6 ( West Germany) BS535A99 ( The UK) All belong to the same steel. Need to further impact resistance, NSK bearings as data using nickel chrome steel, chrome molybdenum steel, chrome molybdenum steel, taking permeability charcoal quenching, make the steel from appearance to the appropriate depth has a soft layer. Have proper softening depth, fine organization, suitable hardness hardness of appearance and the core permeability charcoal NSK bearings, than use NSK bearings of NSK bearing steel have excellent resistance to impact, individual NSK bearings impregnation carbon steel chemical composition. A vacuum degassing, so, the use of data cleaning degree is high, less oxygen content, good quality. Then take the appropriate thermal solution, make the NSK bearings rolling fatigue life obvious progress.