Abstract:The diamond model was simplified to hexahedron based on the macroscopic morphology, and the finite element model of laser brazing diamond was established, and this model was optimized for brazing material climbing. The distribution characteristics of the maximum residual stress of the diamond coating were obtained, and the mechanism of the maximum residual stress on the surface defects of the coating was investigated with experiments. The measured trend of diamond residual stress by Raman spectroscopy agrees well with the calculated results, and the diamond post-weld residual stress is compressive stress. Finally, the mechanism of the influence of diamond post-soldering residual stress on the wear resistance failure of the coating was explored in combination with the wear resistance experiments. The results show that diamond is subjected to appropriate residual compressive stress to help improve the brazing layer''s hold on diamond, and with the increase in diamond post-soldering residual stress, the wear resistance of the coating shows a tendency of first enhancement and then decreasing.