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采用LMY500激光加工系统在45钢表面熔覆Co-Cr合金涂层,利用扫描电镜、金相显微镜分析了熔覆层的形貌及组织特征,优化激光熔覆的工艺参数。结果表明:在一定工艺参数条件下,熔覆层组织致密,晶粒细小,排列规整,与基体呈冶金结合,硬度显著增大,提高了材料的耐磨性。
The laser cladding system of LMY500 was used to coat Co-Cr alloy coating on the surface of 45 steel. The morphology and microstructure of cladding layer were analyzed by scanning electron microscope and metalloscope, and the process parameters of laser cladding were optimized. The results show that under certain process parameters, the cladding layer is dense, with fine grains and regular arrangement, metallurgically bonded with the substrate, the hardness increases significantly, and the wear resistance of the coating is improved.