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Research on Tempering Experiment for Laser Phase Transformation-Hardening Specimen

In this paper, the specimens of GCr15 steel were quenched by laser transformation hardening experiment and then they were tempered at different temperatures. The tempering micromorphology and microstructure of laser surface hardening layer were studied, and the photos of scanning electric microscope(SEM) were used in the fractal analysis. The relationship between the tempered temperatures and the hardness of the hardening layer surface was researched, and the relationship between the hardness of the hardening layer surface and the fractal dimension of the surface hardening layer SEM photos was also researched.