Simulation and experimental study on temperature field and flow field of laser cladding high-temperature Ni-based alloys

Abstract The multiphase liquid’s development during the laser cladding process involves complex processes such as energy input, mass input, heat transfer, multi-phase liquid flow, and rapid solidification. Based on the coupled theory of temperature field and velocity field, a multi-field coupling model for Ni-based high-temperature alloy on the surface of 40Cr has been established. Throughout the modeling procedure, the surface tension coefficient’s impact o.During the modeling process, the effect of the surface tension coefficient on the flow velocity of the molten metal in the melt pool is considered, along with the tracking of the gas/liquid free boundary through the use of the dynamic mesh technique. By comparing experimental and simulation results, it is found that the prediction error of the model ranges from −11.79% to 12.08%, demonstrating that the model has certain explanatory and predictive capabilities for laser cladding of Ni-based high-temperature alloys.