Numerical Simulation of Selective Laser Melting of 304 L Stainless Steel

This paper used the smoothed particle hydrodynamics (SPH) method to construct a three-dimensional mathematical model of selective laser melting (SLM) process 304 L austenitic stainless steel. Important driving force models for melt pool in SLM were developed, including surface tension model, boundary normal-modified wetting effect Marangoni shear and recoil pressure model. Meanwhile, virtual prevented particles from flying over solid boundary. Artificial viscosity, artificial stress, heat added correct SPH equation, which provided guarantee accuracy speed numerical simulation process. Finally, temperature field velocity explored according constructed The evolution mechanism was analyzed, influence different powers on shape molten mainly reference optimizing parameters reduce roughness formed specimen.