Research on the process and melt pool flow mechanism of laser cladding Inconel 625

In order to investigate the process of laser cladding (LC) Inconel 625 alloy powder on Q235 steel plate, this paper focuses on analyzing the effects of different process parameters on the temperature field, stress field and flow behavior of the molten pool through a combination of finite element simulation and experiment. The simulation part establishes a geometric model, applies the Goldak double ellipsoid heat source model, and simulates the LC process by varying the laser power and scanning speed. For the experimental part, LC equipment was used, parameters such as laser power and scanning speed were adjusted, and the melt pool dynamics were observed by infrared temperature measurement and high-speed photography. The results show that the laser power and scanning speed are the key factors affecting the quality of cladding, and the experimental observation coincides with the simulation results, which verifies the validity of the simulation method and provides theoretical basis and experimental support for the optimization of the LC process.