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通过对高磷铸铁表面进行以镍基合金粉末为主的激光合金化处理，调整铸铁表面层中的成分、组织与结构，探讨激光表面合金化层的硬度与耐磨性．实验结果表明，在激光功率为１．５ｋＷ，扫描速度为５ｍｍ／ｓ时，镍铬硼硅粉末能很好地溶于基材之中，形成明显的合金层与过渡区，溶入的合金元素大多以化合物或固溶体的形式存在，合金层与基材结合良好，未见宏观及微观裂纹，表面硬化层的硬度值大幅度提高，并使耐磨性提高５～７倍．
The composition, structure and microstructure of the surface layer of cast iron were adjusted by laser alloying on the surface of high-phosphorous cast iron with Ni-based alloy powders. The hardness and wear resistance of the laser alloying layer were discussed. Experimental results show that at a laser power of 1.5kW and a scanning speed of 5mm / s, the Ni-Cr-Si powder can dissolve well in the substrate and form a distinct alloy layer and transition zone. The dissolved alloying elements Mostly in the form of compound or solid solution, the alloy layer and substrate are well bonded. No macroscopic and micro-cracks are observed. The hardness of the surface hardened layer is greatly increased and the wear resistance is increased by 5 to 7 times.