Research on Gear Repairing Technology by Laser Cladding

摘要

Wearing gears are difficult to repair for the complex teeth surfaces. The experiments of laser cladding were conducted to repair the damaged gears which were made by steel 45, with synchronous powder feeding and gear axial scanning method, and Ni45 powder as cladding material. The relative positions of laser beam and the tooth surface were designed to solve the interference problems in laser cladding process. It analyzed the morphology of the cladding layer in the different test conditions to get optimum parameters, and determined the cladding thickness and overlapping ratio, and optimal sequence by made a comparison of cladding quality in different condition. Microscopic metallographic analysis and hardness testing were made to analyze the performance of cladding layer. Laser cladding method can repair the gear surfaces and raise the wear resistance for obtaining high strength cladding layer on damaged gears teeth surfaces.