Bearing material and performance

One, bearing material 1) Ring, rolling body materials required by the performance: rolling fatigue strength, high hardness, high wear resistance, 2) Cage materials required by the performance: good dimensional stability, mechanical strength and good workability. According to different purposes and demands of its, impact resistance, heat resistance, good corrosion resistance. 3) Ring and rolling body material: ring and rolling body usually use high carbon chromium bearing steel. Most of the bearing, using JIS SUJ2 steel grade. The chemical composition of SUJ2, around the world, as a bearing material has been normalized. For example: with AISL52100 ( The United States) DIN100Cr6 ( West Germany) BS535A99 ( The UK) All belong to the same steel. The steel grade, according to the special purpose, also use the excellent heat resistance of high speed steel, good corrosion resistance of stainless steel. 4) Cage materials: stamping materials, use of 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. Second, the bearing performance: when the detection of chrome steel and stainless steel as a bearing material, the advantages of found that they are not only have antirust function. Chrome steel is one of the most common bearing material. It is more hard than stainless steel, so the service life is longer. At higher temperatures, however, its performance is not good. Under the high temperature of 120 c, it will happen enormous deformation, load decrease. Continues the high temperature of 150 c it also can stand, but the moment 150 c or higher temperature will reduce the service life of bearing. Heat treatment can make the bearing instant high temperature of 170 c. The most common used in bearing stainless steel, 440, it's hard and strong enough to load, Less than 20%) brass steel , but it can rust, can endure instant high temperature of 250 c and 300 c of the continuous high temperature. We often mistake as all of the stainless steel are no magnetic, 440 stainless steel is a magnetic, it is not completely rust, but under the influence of salt, acid, alkali. 316 grades of antirust performance is very good, no magnetic, but softer so load less, because it is not strong, so 316 bearing accuracy is not high, feel is rough.