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本工作在奥氏体不锈钢等基材上激光熔覆镍基硬面合金，对其工艺、微观组织和性能进行了较深入的研究。通过扫描电镜、Ｘ射线衍射仪、金相等微观分析方法研究，对快速凝固激光熔覆合金层的非平衡态微观组织特性、形成条件与其性能关系有较深入的了解。结果表明，合金层微观组织为超细的共晶组织，在含Ｃｒ、Ｓｉ、Ｃ、Ｂ元素过饱和γＮｉ（Ｆｅ）奥氏体基体中，均匀分布着细小的树枝状碳化物、硼化物及硅化物；获得这种特殊的快速凝固非平衡态超细共晶组织及与基材的良好冶金结合是它具有良好的力学性能和耐磨耐蚀使用性能的关键。
In this work, austenitic stainless steel and other substrates were laser clad nickel-based hard alloy, its technology, microstructure and properties of a more in-depth study. The relationship between the non-equilibrium microstructure, the formation conditions and the properties of the rapidly solidified laser cladding alloy layer has been studied by scanning electron microscopy, X-ray diffraction and microstructure analysis. The results show that the microstructure of the alloy layer is ultrafine eutectic. In the austenite matrix containing Cr, Si, C, B supersaturated γNi (Fe) austenite, fine dendritic carbides, borides and Silicide; access to this special rapid solidification of non-equilibrium ultra-fine eutectic microstructure and the substrate with a good combination of it is its good mechanical properties and wear-resistant corrosion resistance to use the key performance.