为了研究预置激光熔覆在45#钢制备Ni基非晶合金涂层，采用非晶形成能力三判据原则及非晶成分团簇线定律法则，选取常规非晶合金制备方法中具有较强非晶形成能力的Ni42Zr30Ta28合金成分，并对不同输出功率下得到的熔覆层微观组织和力学及腐蚀性能进行了理论分析和结果验证,取得了涂层的显微硬度、耐磨性、耐盐性的数据。结果表明，激光熔覆Ni42Zr30Ta28涂层中除含有非晶相外还含有Ni3Zr,Ni5Ta,Ni7Zr2等晶化相。相比45#钢，非晶合金涂层在力学和腐蚀性能上都有较大提高。当激光功率为3300W时，熔覆层表层显微硬度值最大为1496.4HK，表面磨损率为0.778g·mm-2；涂层由于非晶相的存在耐蚀性有明显提高,在功率为3000W时，试样单位面积增重量为0.0026g·mm-2,耐盐性最好。这为高能激光制备大面积非晶涂层提供了理论依据。

In order to prepare Ni-based amorphous alloy coating on the surface of 45# steel substrate by means of pre-laser cladding method, using the principle of the three clusters and the amorphous line of the law of composition rules, choosing Ni42Zr30Ta28 alloying powder which has a great glass-forming ability in conventional preparation methods of amorphous alloys, the microstructure, mechanical and corrosion performance of the laser cladding coating were analyzed and tested in experiments under the conditions of different laser power. The micro-hardness, wear resistance, salt spray data were obtained. The results showed that: the laser cladding Ni42Zr30Ta28 amorphous composite coating included amorphous and Ni3Zr,Ni5Ta,Ni7Zr2 phase crystallization. Compared with 45# steel, the mechanical and corrosion performance of the amorphous alloy coating were improved greatly. When the laser power was 3300W, the micro-hardness of coating surface reached up to 1496.4HK; The superficial rate of wear was 0.778g·mm-2; The corrosion resistance of the coating was improved due to the existence of amorphous. When the laser power was 3000W, the increased unit area weight of the test specimen was 0.0026g·mm-2, and the salt endurance was best.The results provide the theoretical base for large area amorphous composit coating used in high energy lasers.