Bearing crack disposal method

Source: China Bearing Network Time: 2013-05-21

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1. The enthalpy layer formed by the grinding force. During the grinding process, the outer surface of the workpiece will be affected by the cutting force, compressive force and friction of the grinding wheel. Especially the effect of the latter two; the outer surface of the workpiece is very directional. Plastic deformation layer and work hardening layer. These metamorphic layers must affect the change of residual stress in the outer layer.
2. The secondary quenching burn will change the stress of the outer surface of the nsk bearing workpiece. The secondary quenching zone is under pressure; the maximum tensile stress exists in the high temperature tempering zone below; here is the local crack that is most likely to occur at the center of the crack. The simplest is conveyed along the original austenite grain boundary. Severe burns will cause the entire grinding surface to appear cracks (more cracks) to form the workpiece.

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