Material decided to KOYO self-aligning ball bearing service life

Further need impact resistance, used as a bearing material 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 coal bearing, self-aligning ball than using the bearing steel bearing has excellent resistance to impact, the average permeability coal bearing steel chemical composition. 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, make the self-aligning ball bearing the amount of scroll exhausted 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. Determined by KOYO bearing structure design parameters of stiffness, flexibility, quality, such as damping of vibration system under the condition of operation will produce that can meet the needs of its mechanical vibration. Manufacturing process of the deviation caused by vibration, the smaller the deviation, the less vibration. Roundness, waviness and surface roughness on the surface of the steel ball is the KOYO bearing parts in the most profound effect on the vibration factor, followed by the shape of the inner ring and outer ring channel error and surface roughness, again is bearing cleanliness and lubricant quality, etc. Operation conditions such as the installation conditions, speed, direction of axial load, quantity, etc. Bearing surface form of fatigue failure is a failure, mainly for fatigue crack initiation, expansion and fracture process, under alternating load generated by the fault of the long-term effects of the metal. Cracks in two aspects: first, on the surface, this is, KOYO bearing in the process of rolling contact, because of the work in the plastic deformation and strain hardening on the surface of the contact stress on the surface of the cyclical changes caused by the effect of external load, and finally on the inner surface of the small crack from the development, the formation of surface crack between the two, because Xie into the lubricant on the surface of the work, the power of the open, crack down on the wall, crack force to move forward; Second: from the surface, under the pressure of repeatedly, the surface contact, the first where exposed on the surface of the crack depth of a crack, and along the surface direction Angle, to a certain depth, since on the surface of contact area, and beyond the surface, and finally form the corrosion, leaving a horse pit. 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, the bearing ring, rolling element 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: good dimensional stability and mechanical strength; In addition, also need good workability. According to different purposes and demands of its, impact resistance, heat resistance, good corrosion resistance.