Journal of Engineering Research

High-nitrogen stainless steel (HNSS) has broad application prospects in high-end manufacturing due to its excellent mechanical properties and corrosion resistance. Selective laser melting (SLM) technology provides a new path for efficient manufacturing of complex structural parts, but nitrogen behavior control during the forming process still faces challenges. This paper focuses on the nitrogen behavior of HNSS during SLM, investigates the influence mechanism of different process parameters on nitrogen release and retention, and proposes optimized control strategies to improve forming quality and material properties. Through a combination of experimental and simulation analyses, the key role of atmosphere regulation and powder characteristics in nitrogen content variation is revealed, providing theoretical support and technical basis for achieving stability and controllability in additive manufacturing of HNSS.

High-nitrogen stainless steel; Selective laser melting; Nitrogen behavior; Forming control; Additive manufacturing