Nitrogen stabilized austenitic stainless steel exhibits better combination of mechanical properties and corrosion resistance as compared to the conventional nickel containing 316L SS. It is a cost-effective replacement of conventional 316L SS used in various applications where air jet solid particle erosion is observed. This paper presents the erosion behavior of pre oxidized nickel free nitrogen stabilized austenitic stainless steel (18Cr-21Mn-0.65N-Fe) at four different temperatures. The stainless steel was first air oxidized for 100 h at 400, 500, 600 and 700 C and then subsequently subjected to solid particle erosion at 400, 500, 600 and 700 C respectively with particle velocity of 100 m s⁻¹. The erodent discharge rate was maintained at 4.60.5 gm min⁻¹ and three impact angle 60, 75, and 90 were employed. Optical microscopy, Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and x-ray Diffraction technique (XRD) were used to characterize the eroded surface. Tensile tests and microhardness were performed to better understand the erosion behavior. The erosion rate increased steadily upto 500 C, and there was an exponential increase at 600 and 700 C. It is found to be associated with a decrease in the tensile strength and hardness of the steel. High temperature oxidation (preaging) resulted in the precipitation of harmful chromium nitride (Cr₂N) which has accelerated the erosion rate at 600 and 700 C. The alloy exhibited better erosion resistance at 90 impact angle compared to 60 and 75. The main mechanism of erosion was ploughing, indenting, delamination and pitting.

与传统的含镍 316L SS 相比，氮稳定奥氏体不锈钢表现出更好的机械性能和耐腐蚀性组合。它是传统 316L SS 的经济高效替代品，用于观察喷气式固体颗粒侵蚀的各种应用。本文介绍了预氧化无镍氮稳定奥氏体不锈钢 (18Cr-21Mn-0.65N-Fe) 在四种不同温度下的侵蚀行为。不锈钢首先在 400、500、600 和 700 C 下空气氧化 100 小时，然后分别在 400、500、600 和 700 C 下进行固体颗粒侵蚀，颗粒速度为 100 ms ^-1。侵蚀剂排放率保持在 4.60.5 gm min ^-1并且采用了三个冲击角 60、75 和 90。使用光学显微镜、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM) 和 X 射线衍射技术 (XRD) 来表征腐蚀表面。进行拉伸测试和显微硬度以更好地了解侵蚀行为。侵蚀率稳定增加到 500 C，在 600 和 700 C 时呈指数增长。发现这与钢的抗拉强度和硬度降低有关。高温氧化（预时效）导致有害的氮化铬（Cr ₂N) 在 600 和 700 C 下加速了冲蚀速率。与 60 和 75 度相比，该合金在 90 度冲击角下表现出更好的耐冲蚀性。冲蚀的主要机制是犁沟、压痕、分层和点蚀。