Research on Experimental Optimization of Nanosecond Laser Cleaning Technology for Thin Oxide Layer on Aluminum Alloy Surface

In view of the traditional aluminum alloy cleaning processing problems such as dust and pollution, the surface of the aluminum alloy material thin oxide layer and micro dust particles were studied by laser cleaning process. The mechanism of laser cleaning aluminium and new cleaning process were proved by experimental optimization of nanosecond laser cleaning technology for thin oxide layer on aluminum alloy surface. The microstructure and roughness of the surface were detected by microscopy system and confocal microscope, and the optimal process parameters of laser cleaning aluminum alloy were determined. Aluminum alloy was taken as the experimental object, through nanosecond laser cleaning experimental, laser power, cleaning scanning speed, filling density and laser frequency are the main parameters that affect laser cleaning aluminum alloy. It can reduce the roughness of the oxidation layer on the surface greatly, which will not damage to the substrate, to achieve efficient laser cleaning, with 532 wavelength green nanosecond laser, 2500mm/s scanning speed and 36W laser power.