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Nb在高铝铁素体钢中的固溶析出行为

刘鹏程 徐翔宇 刘倩男 李建赭 刘丹 延泽鹏 孙明煜 王学敏

刘鹏程, 徐翔宇, 刘倩男, 李建赭, 刘丹, 延泽鹏, 孙明煜, 王学敏. Nb在高铝铁素体钢中的固溶析出行为[J]. 工程科学学报, 2019, 41(7): 882-888. doi: 10.13374/j.issn2095-9389.2019.07.006
引用本文: 刘鹏程, 徐翔宇, 刘倩男, 李建赭, 刘丹, 延泽鹏, 孙明煜, 王学敏. Nb在高铝铁素体钢中的固溶析出行为[J]. 工程科学学报, 2019, 41(7): 882-888. doi: 10.13374/j.issn2095-9389.2019.07.006
LIU Peng-cheng, XU Xiang-yu, LIU Qian-nan, LI Jian-zhe, LIU Dan, YAN Ze-peng, SUN Ming-yu, WANG Xue-min. Solid solution and precipitation behavior of Nb in Al-bearing ferritic steels[J]. Chinese Journal of Engineering, 2019, 41(7): 882-888. doi: 10.13374/j.issn2095-9389.2019.07.006
Citation: LIU Peng-cheng, XU Xiang-yu, LIU Qian-nan, LI Jian-zhe, LIU Dan, YAN Ze-peng, SUN Ming-yu, WANG Xue-min. Solid solution and precipitation behavior of Nb in Al-bearing ferritic steels[J]. Chinese Journal of Engineering, 2019, 41(7): 882-888. doi: 10.13374/j.issn2095-9389.2019.07.006

Nb在高铝铁素体钢中的固溶析出行为

doi: 10.13374/j.issn2095-9389.2019.07.006
详细信息
  • 中图分类号: TG142.1

Solid solution and precipitation behavior of Nb in Al-bearing ferritic steels

  • 摘要: 采用电解相分析方法,结合X射线衍射分析和电感耦合等离子体原子发射光谱仪(ICP)、扫描电镜(SEM)、透射电镜(TEM)等对高铝铁素体基体中的析出相颗粒粉末和电解液进行定性定量分析. 试验结果表明,试验钢中固态析出相主要为NbC以及少量的Al2O3和AlN夹杂. 通过扫描电镜观察不同再加热温度下NbC分布状态,发现随着固溶温度的升高,铸态组织中存在的NbC析出逐渐回溶,数量随之减少且发生明显的粗化行为. 当温度升高到1100℃,大部分NbC已经回溶到高温铁素体基体中. 在利用Thermo-Calc热力学计算软件分析Nb及其碳化物的热力学性质基础上,计算得到Al与Nb的相互作用系数,表明Al能够降低Nb在铁素体基体中的活度,提高其在基体中的固溶度,进一步得到了NbC在高铝铁素体钢中的固溶度积公式,发展了高温铁素体中的Nb微合金化理论,为进一步的应用提供了理论基础.
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出版历程
  • 收稿日期:  2019-01-12

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