为研究激光熔覆技术修复局部腐蚀钢板后修复件的力学性能，通过单轴拉伸试验研究了腐蚀方式、腐蚀界面处理方式、腐蚀深度以及激光熔覆扫描路径对修复件力学性能的影响规律，获得了局部腐蚀件和激光熔覆修复件的力-位移曲线以及力学性能折减系数。结果表明：通过激光熔覆技术修复的局部片腐蚀和局部点腐蚀钢板，其弹性模量、屈服强度和极限强度与完整件基本相当，极限伸长率可恢复到完整件的70%以上；柔化处理熔覆层侧面-基材界面或增加搭接区域可将修复件断裂位置从熔覆层侧面-基材界面转移到基材，进一步提升修复件力学性能；激光熔覆技术可修复不同腐蚀深度的腐蚀钢板，且修复件的力学性能对扫描路径不敏感。

In order to study the mechanical property of reworked coupons of locally corroded steel plate repaired with laser cladding technology，this paper studied the effect law of forms of corrosion，treatment of corrosion interface，corrosion depth，and scanning path of laser cladding on the mechanical property of reworked coupons through uniaxial tensile test.And it obtained the force-displacement curve and mechanical property reduction factors of the locally corroded steel plate and its reworked coupons repaired by laser cladding.The results show that the modulus of elasticity，yield strength and ultimate strength of locally corroded steel plate coupons repaired by laser cladding technology are roughly equivalent to those of intact coupons，and its ultimate elongation can be recovered to more than 70% of that of intact coupons.Soft treatment of cladding layer side-substrate interface or increasing the overlap region can move fracture location from the cladding layer side-substrate interface to the substrate and further enhance the mechanical properties of the repaired coupons.Laser cladding technology can repair steel plates of different depth of corrosion and the mechanical performance of the repaired coupons is not sensitive to the scanning path.