NTN bearing imported materials and the relationship between the performance

NTN import bearings of the choice of material in NTN import bearings performance has a certain impact. Rolling bearing ring and rolling body, one side again and again under high contact pressure, accompanied by sliding of rolling contact. Retainer, one side and on either side of the ring and rolling body, or its one side sliding contact, one side under tension and compression force. Therefore, ring of NTN import bearings, roller and cage materials, properties, main requirements are as follows. Ring, rolling body materials required by the performance: rolling fatigue strength high hardness, high resistance to friction consumption cage materials required by the performance: the size stability, good mechanical strength and good workability. According to different purposes and demands of its, impact resistance, heat resistance, good corrosion resistance. Ring and rolling body material: ring and rolling body usually use high carbon chromium bearing steel. Most of the NTN import bearings, using JIS SUJ2 steel grade. Large-scale use SUJ3 NTN import bearings. The chemical composition of SUJ2, around the world, as NTN import bearings with material has been normalized. For example: with AISL52100 ( The United States) DIN100Cr6 ( West Germany) BS535A99 ( The UK) All belong to the same steel. Need further impact resistance, as imports NTN bearing material using nickel chrome steel, chrome molybdenum steel, chrome molybdenum steel, using carbon quenching, make the steel from the surface to the appropriate depth has a hardening layer. With appropriate hardening depth, fine structure, suitable hardness hardness of surface and the core permeability of charcoal NTN import bearings, NTN import bearings are than using bearing steel with good resistance to impact, the average permeability carbon imports NTN bearing steel chemical composition. NSK implemented a vacuum degassing treatment, so, the materials used in the clean degree is high, less oxygen content, good quality. Then use the appropriate heat treatment, NTN import bearings rolling fatigue life improved significantly. The steel grade, according to the special purpose, also use the excellent heat resistance of high speed steel, good corrosion resistance of stainless steel. Cage materials: punch retainers material, using low carbon steel. According to different purposes, also used brass, stainless steel plate. Cutting system maintains a material, the use of high-intensity brass, carbon steel, and also the use of synthetic resin.