Numerical Simulation of Heat Process of the Laser Welding

A mathematical model to describe moving laser welding was developed by using the Rotary-Gauss body heat source model and neglecting the effect of keyhole on thermal conduct.Numerical simulation was conducted by PHOENICS 3.4 software.The model was applied to laser welding processing of SUS304 stainless steel.The shape of molten pool and the temperature field were analyzed.The shape of molten pool looks like “nailhead” shape.The simulation results of molten pool shape provide good agree with the practice welding results.