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Effect of Nitrogen on the Hot Deformation Behavior of 0.4C–13Cr Martensitic Stainless Steel
Steel Research International ( IF 1.9 ) Pub Date : 2021-04-23 , DOI: 10.1002/srin.202100020 Weijian Liu 1 , Jing Li 1 , Shouhui Li 1 , Jihui Li 2 , Xuejun Li 2
Steel Research International ( IF 1.9 ) Pub Date : 2021-04-23 , DOI: 10.1002/srin.202100020 Weijian Liu 1 , Jing Li 1 , Shouhui Li 1 , Jihui Li 2 , Xuejun Li 2
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The hot deformation behaviors of 0.4C–13Cr martensitic stainless steel at the nitrogen contents of 0.13% and 0.03%, respectively, are investigated at the deformation condition featuring the temperature range of 1223–1523 K and the strain rate range of 0.01–10 s−1. The variation of flow stress curves of experimental steels with different nitrogen contents is systematically analyzed. According to the flow stress curves, the activation energies determined by regression analysis are 472.77 and 411.58 kJ mol−1 for 0.4C–13Cr steel with N contents of 0.13% and 0.03%, respectively. It demonstrates that the deformation resistance of 0.4C–13Cr steel improves with the increase in nitrogen content. The reason is related to the pinning effect of solid solution nitrogen atoms, and Cr2N particles on dislocations and grain boundaries. The dynamic recrystallization (DRX) kinetics models of experimental steels are established. Furthermore, the microstructures of experimental steels are also analyzed. The result shows that the pinning effect caused by nitrogen also plays an important role in the development of DRX and microstructure evolution. The more nitrogen addition in 0.4C–13Cr steel, the earlier achievement of DRX onset, the slower the DRX kinetics and the finer the microstructure.
中文翻译：
氮对0.4C-13Cr马氏体不锈钢热变形行为的影响
研究了氮含量分别为0.13%和0.03%的0.4C-13Cr马氏体不锈钢在温度范围为1223-1523 K和应变速率范围为0.01-10 s的变形条件下的热变形行为-1。系统分析了不同氮含量实验钢的流动应力曲线变化。根据流动应力曲线，通过回归分析确定的活化能分别为 472.77 和 411.58 kJ mol -1对于 N 含量为 0.13% 和 0.03% 的0.4C -13Cr 钢。说明0.4C-13Cr钢的变形抗力随着氮含量的增加而提高。原因与固溶氮原子的钉扎作用有关，Cr 2位错和晶界上的 N 粒子。建立了实验钢的动态再结晶（DRX）动力学模型。此外，还分析了实验钢的显微组织。结果表明，氮引起的钉扎效应在 DRX 的发展和微观结构演变中也起着重要作用。在 0.4C-13Cr 钢中添加的氮越多，DRX 发生越早，DRX 动力学越慢，微观结构越精细。
更新日期：2021-04-23
中文翻译：
氮对0.4C-13Cr马氏体不锈钢热变形行为的影响
研究了氮含量分别为0.13%和0.03%的0.4C-13Cr马氏体不锈钢在温度范围为1223-1523 K和应变速率范围为0.01-10 s的变形条件下的热变形行为-1。系统分析了不同氮含量实验钢的流动应力曲线变化。根据流动应力曲线，通过回归分析确定的活化能分别为 472.77 和 411.58 kJ mol -1对于 N 含量为 0.13% 和 0.03% 的0.4C -13Cr 钢。说明0.4C-13Cr钢的变形抗力随着氮含量的增加而提高。原因与固溶氮原子的钉扎作用有关，Cr 2位错和晶界上的 N 粒子。建立了实验钢的动态再结晶（DRX）动力学模型。此外，还分析了实验钢的显微组织。结果表明，氮引起的钉扎效应在 DRX 的发展和微观结构演变中也起着重要作用。在 0.4C-13Cr 钢中添加的氮越多，DRX 发生越早，DRX 动力学越慢，微观结构越精细。
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