Optimization of Laser Cladding Conditionsin Response Surface Method for Repairing Damaged Alloy Parts

The influence of the laser cladding conditions for repairing damaged alloy parts, including the laser power, powder feed-rate and scanning speed, on the height and width of the cladded layer was investigated in response surface method.First, the center composite experiment was designed with Design-Expert software; next, the experimental data were analyzed; and finally, the established perturbation map and 3D response surface were derived.The results show that the impact factors of the laser cladding conditions can be listed in a descending order:laser power > powder feed-rate > scanning speed; and that the correlation between the powder feed-rate and scanning speed and the relation between the laser power and powder feed-rate also have a major impact.The optimized laser cladding conditions were found to be a laser power of 3.94 kW, a powder feeding-rate of 60 g/min and a scanning speed of 4 mm/s.