Temperature Field Distribution for Laser Cladding on Axially Symmetrical Parts

Abstract Laser cladding surface modification technology is widely used to strengthen and repair the surface of axially symmetrical parts. Based on the Gauss heat source model and COMSOL Multiphysics finite element analysis software, the surface modification process characteristics of laser cladding on the rotating substrate were studied by numerical simulation. The transient temperature field distribution under different process parameters was solved. Laser cladding pool corresponding to numerical simulation parameters was photographed by infrared high-speed camera. The results show that the temperature distribution of the Gauss heat source is delayed due to the normal distribution of heat flow and the cumulative effect of heat. In addition, with the increase of the rotational speed of the substrate, a cyclic preheating temperature band will be formed on the surface. The shape of molten pool obtained by temperature field analysis is droplet shape, which is basically consistent with the actual morphology of laser cladding molten pool.