Remelting treatment of In718 and In625 coatings deposited by supersonic particles were conducted by using laser technology. The microstructure, phase composition, microhardness, wear resistance and corrosion of the coating before and after remelting were studied. The results showed that defects such as voids and cracks of the deposited coating were eliminated by laser remelting treatment, the microstructure of the coating became compact and uniform and the bonding mode changed from mechanical bonding to metallurgical bonding. The deposited coating consisted of γ-Ni solid solution and Fe₃Ni₂ intermetallic compound phase, remelting to form a new phase Ni₃(Al,Ti) and high hard phase carbide (Nb,Mo) C. The average microhardness of the remelted coating was 6.96 GPa, which was 1.72 times than that of the deposited coating. The wear resistance of remelting coating was significantly better than that of deposited coating and substrate, and its wear form was mainly abrasive wear. The corrosion resistance of the coating was significantly improved after remelting treatment.

采用激光技术对超音速粒子沉积的In718和In625涂层进行重熔处理。研究了重熔前后涂层的显微组织、相组成、显微硬度、耐磨性和腐蚀性能。结果表明，激光重熔处理消除了沉积涂层的空隙、裂纹等缺陷，涂层组织致密均匀，结合方式由机械结合转变为冶金结合。沉积涂层由γ- Ni固溶体和Fe ₃ Ni ₂金属间化合物相组成，重熔形成新相Ni ₃(Al,Ti)和高硬相碳化物(Nb,Mo)C。重熔涂层的平均显微硬度为6.96 GPa，是沉积涂层的1.72倍。重熔涂层的耐磨性明显优于沉积涂层和基体，其磨损形式主要为磨粒磨损。重熔处理后涂层的耐腐蚀性能显着提高。