镁合金表面激光熔覆Fe合金
Laser Cladding of Fe Alloy on Surface of Magnesium Alloy
张 仁, 肖泽辉
作者单位：湘潭大学 机械工程学院, 湖南 湘潭 411105
中文关键字：两步法； 激光熔覆； 显微硬度； 耐腐蚀性能； 耐磨损性能
英文关键字：two-step method; laser cladding; micro-hardness; corrosion resistance; wear properties
中文摘要：采用热喷涂+激光重熔两步法工艺对镁合金表面进行激光熔覆Fe-Ni-Cr-B-Si合金；对熔覆层进行了微观分析及性能测试。结果表明：熔覆层主要由FeCr、FeNi和AlNi3等相组成，熔覆层的显微硬度、耐腐蚀性及耐磨损性能都明显高于基体。
英文摘要：Laser cladding of Fe-Ni-Cr-B-Si alloy on AZ91D alloy surface was achieved by two-step method, i.e. thermal spraying and laser re-melting. The microstructure and properties of cladding layer were investigated. The resutls show that the surface layer is composed of phases of FeCr, FeNi and AlNi3. The micro-hardness, wear properties and corrosion resistance are considerably improved as compared to the matrix.