通过激光熔覆技术制备了自组装 Cu92Fe8偏晶复合涂层,研究了其相分离特征、显微硬度、耐腐蚀和磁学性能。结果表明,球磨后Cu92Fe8复合粉末的颗粒尺寸减小,且由少量的体心立方α-Fe相与固溶体Cu相组成。在激光熔覆过程中,过冷Cu92Fe8熔体发生液相分离,球状富铁的α-Fe颗粒均匀分布于富铜的ε-Cu相基体中;自组装 Cu92Fe8偏晶复合涂层的硬度均匀分布且略大于黄铜,耐腐蚀性能略逊于黄铜,但具有较好的软磁性能。

The self-assembled Cu92Fe8 immiscible composite coating is fabricated by the laser cladding technique. Its phase separation, microhardness, corrosion resistance and magnetic properties are investigated. The results indicate that the particle size of Cu92Fe8 composite powder decreases significantly after ball milling, which consists of small amounts of body-centered cubic α-Fe and solid solution Cu. During the process of laser cladding, the supercooled Cu92Fe8 melt experiences liquid phase separation, and many spherical Fe-rich α-Fe particles are evenly embedded within the Cu-rich ε-Cu matrix. The microhardness of the self-assembled Cu92Fe8 immiscible composite coating is uniform and slightly higher than that of brass, and its corrosion resistance is slightly worse than that of brass, but its soft magnetic property is better.