In order to avoid defects such as overburning and collapsing at the boundary of laser cladding layer,difference of heat dissipation at different positions of the substrate was analyzed based on the theory of heat conduction. The influence of scanning path on temperature distribution was studied by numerical calculation. With the parameters of laser power 1000 W,scanning speed 5 mm/s,powder feeding quantity 9. 15 g/min,scanning interval 1. 5 mm and substrate size 40 mm × 30 mm × 7 mm,molten pool temperature ...
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