METHOD FOR PERFORMING LASER CLADDING OF SILVER LAYER ON COPPER SUBSTRATE, AND USE OF METHOD IN REPAIR OF LARGE-CURRENT COPPER BUSBAR OF HYDROELECTRIC GENERATING SET

The present invention provides a method for performing laser cladding of a silver layer on a copper substrate, and a use of said method in repair of a large-current copper busbar of a hydroelectric generating set. The specific steps are: S1, performing pretreatment before cladding: performing sanding to remove impurities and an oxide layer on the surface of a copper substrate, and performing cleaning and drying; S2, performing laser cladding: adopting a blue laser cladding device and using silver-copper alloy powder as a powder material to perform laser cladding of a silver layer on the copper substrate in a coaxial powder feeding manner, wherein the laser power is 1100 W-1350 W, the scanning speed of a laser cladding head is 6 mm/s-10 mm/s, and the overlapping rate is 45%-65%; and S3, sanding the cladded silver layer on the surface of the copper substrate, so that said cladded silver layer meets related requirements. The method provided by the present invention can implement cladding of a highly reflective a