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The generation of grinding cracks during the grinding process will adversely affect the service performance of the workpiece and even cause the workpiece to be scrapped. However, the microscopic formation mechanism of grinding cracks is still unclear at present. In this regard, the morphologies of grinding cracks on the surface of the cam were characterized, and the initiation and propagation behaviors of grinding cracks were analyzed from the perspectives of element composition, micro-structure and surface work hardening. Based on the experimental results and analysis, the generation mechanism of grinding cracks is clarified, and measures to prevent the grinding cracks are proposed.

Investigation on grinding-induced cracking mechanism of 40Cr steel camshaft