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Talking about the relationship between the function of the bearing and the material
Source: China Bearing Network Time: 2018-05-26
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The choice of material for the bearing has a certain influence on the bearing function.
In addition to the above steel grades; according to the unique use; also use high-speed steel with excellent heat resistance; stainless steel with good corrosion resistance.
Cage material: material for stamping cage; low carbon steel. Different depending on the application; also used brass plate, stainless steel plate. Material for cutting cage; using high-strength brass, carbon steel; Apply differentiation resin.
Ferrule and roll material: ferrule and roll body are generally made of high carbon chromium bearing steel. Most of the bearings; use JJ steel type SUJ2. Large bearings use SUJ3.
The chemical composition of SUJ2; in the world; as a bearing material has been standardized. For example: with AISL52100 (United States), DIN100Cr6 (West Germany), BS535A99 (UK) are the same kind of steel.
Further need to withstand impact; use chrome steel, chrome molybdenum steel, nickel chrome molybdenum steel as bearing material, adopt carburizing and quenching; make steel have a softening layer from the surface to the proper depth. With proper softening depth and fineness Arrangement, suitable for hardness surface and core hardness of the carburized bearing; better bearing impact than bearing steel bearing; a chemical component of another carburized bearing steel.
The function sought by the cage material: good dimensional stability, high mechanical strength, NSK has implemented vacuum degassing; therefore; the materials used have high purity, low oxygen content and good quality. The appropriate heat treatment is adopted; The tumbling fatigue life progressed significantly.
The function sought by the ferrule and the tumbling material: tumbling the ferrule and the tumbling body of the high-hardness, high-wear and high-floating rolling bearing; one side repeatedly suffers from high touch pressure; one side carries the tumbling touch accompanied by sliding. Therefore; The ferrule; the material, function and important requirements of the roll and cage are as follows: the retainer; one side with the ferrule and the roll body; or one of the sides sliding touch; one side is subjected to tension and shortening force.
In addition, it also needs good processability. It is different according to the application; it is also required to have good impact resistance, heat resistance and corrosion resistance.
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