SLM (Selective Laser Melting) of stainless steel is currently one of the most technologically mature and widely applied processes in the field of metal 3D printing. By utilizing a high-energy laser to completely melt metal powder, it builds up dense metal parts layer by layer; the entire process is conducted under an inert gas atmosphere to prevent oxidation. This process enables the direct fabrication of high-density, high-performance stainless steel components, which are widely utilized across various sectors, including industry, medicine, and aerospace.