In this paper,experimental and simulation studies are conducted on the flow behavior and weld forming of304 stainless steel in the scanning laser welding process. In this study,the flow behavior of the molten pool is studied by using a three-dimensional transient model with keyhole effect and a high-speed camera platform. The results show that in the welding process,the holes will push the molten metal to flow perpendicular to the welding direction. When the molten metal hits the side wall of the molten pool,there will be overflow of the molten pool. When the scanning frequency is too high,the molten pool will splash. In addition,the morph-ologies of welding seams with different scanning frequencies and widths are compared and analyzed. The results show that when the scanning amplitude and other parameters are fixed,the lower scanning frequency has stronger effects on the base material. When the scanning frequency and other parameters are fixed,smaller scanning amplitude has stronger effects on the parent material.
laser weldingbeam oscillationnumerical simulationmolten pool flowkeyhole effect