摘要
高氮不锈钢因其优异的力学性能和耐腐蚀性，在高端制造领域具有广泛应用前景。激光选区熔化成形（SLS）技术为复杂结构零件的高效制造提供了新路径，但在成形过程中氮气行为控制仍面临挑战。本文围绕高氮不锈钢在SLS过程中的氮气行为展开研究，探讨不同工艺参数对氮气释放与保留的影响机制，提出优化控制策略以提升成形质量与材料性能。通过实验与模拟分析相结合的方法，揭示了气氛调控与粉末特性对氮含量变化的关键作用，为实现高氮不锈钢增材制造的稳定性和可控性提供理论支持和技术依据。
关键词： 高氮不锈钢；激光选区熔化；氮气行为；成形控制；增材制造
Abstract
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.
Key words： High-nitrogen stainless steel; Selective laser melting; Nitrogen behavior; Forming control; Additive manufacturing
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