The Influence of Printing Parameters on Selective Laser Melting Forming of 316L Stainless Steel

In this study, 316L stainless steel samples were fabricated using selective laser melting, and the effects of scanning rate and laser power on the microstructure and mechanical properties were systematically investigated. The results indicate that at a scanning rate of 1000 mm/s, the molten pool undergoes rapid solidification, leading to the formation of fine grains and high-density solidification cellular structures. With increasing laser power, the tensile strength initially increases and then decreases. This behavior is attributed to moderate heat input, which allows the molten pool to melt sufficiently and form a dense microstructure during solidification, whereas excessive heat input results in the introduction of additional defects. This study clarifies the intrinsic correlations among process parameters, microstructure, and mechanical properties, providing a useful reference for the optimization of selective laser melting process parameters and the customized manufacturing of high-performance metal components.