Bearing material:
Rolling of rings and rolling bodies on the one hand to withstand repeated high contact pressure, on the one hand with a sliding rolling contact. Retainer on the one hand and the rings and rolling elements on both sides, or one side sliding contact, one side to bear tension and compression. Therefore, bearing rings, rolling element and cage materials, performance, main requirements are as follows.
Rings, rolling the required material properties:
Large rolling fatigue of high hardness and high resistance to abrasion
Cage Material properties required:
Good mechanical strength, dimensional stability
In addition, it requires good process. According to different uses, as well as requirements of its impact resistance, heat resistance, good corrosion resistance.
Ring and ball material:
Ring and ball usually use high carbon chromium bearing steel. Air Conditioner Bearings Most of the bearings, use the JIS steel in SUJ2. Large bearings SUJ3.
SUJ2 chemical composition, in the world, as bearing materials have been standardized. For example: with AISL52100 (U.S.), DIN100Cr6 (West Germany), BS535A99 (UK), etc. are the same kinds of steel.
Further need for impact-resistant case, as the bearing material using chrome steel, chrome molybdenum steel, nickel chromium molybdenum steel, hardened by infiltration of carbon to steel from the surface to the appropriate depth has a hardened layer. With appropriate hardening depth, meticulous organization, the appropriate surface hardness and rigidity of the permeability of carbon center bearing, Bearing steel bearings than with excellent impact resistance, the average penetration of the chemical composition of carbon steel bearings.
NSK implemented a vacuum degassing treatment, so the material used is high purity, oxygen content of less good quality. Then use the appropriate heat treatment, so that the rolling bearing fatigue life significantly increased the amount.
Outside of the steel, according to a special purpose, high heat resistance also use high-speed steel, good corrosion resistance of stainless steel.
Cage Material:
Stamping cage material, the use of low carbon steel. According to different uses, also used yellow copper, stainless steel plate. Cut to cage materials, use of high strength brass, carbon steel, in addition also has the use of synthetic resin.
