东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2008, Vol. 29 ›› Issue (4): 549-552.DOI: -

• 论著 • 上一篇    下一篇

氮在Fe-Cr-Mn合金体系中的溶解度计算模型

李花兵;姜周华;张祖瑞;许宝玉;   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院;东北大学材料与冶金学院 辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004;辽宁沈阳110004
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2008-04-15 发布日期:2013-06-22
  • 通讯作者: Li, H.-B.
  • 作者简介:-
  • 基金资助:
    国家自然科学基金和上海宝钢集团公司联合资助重点项目(50534010)

Thermodynamic model to calculate nitrogen solubility in Fe-Cr-Mn alloys

Li, Hua-Bing (1); Jiang, Zhou-Hua (1); Zhang, Zu-Rui (1); Xu, Bao-Yu (1)   

  1. (1) School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2008-04-15 Published:2013-06-22
  • Contact: Li, H.-B.
  • About author:-
  • Supported by:
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摘要： 基于前期的研究成果和规则熔体模型,建立了氮在Fe-Cr-Mn合金体系各相中氮溶解度计算模型.对18Cr-18Mn合金体系的计算结果表明,随着氮分压的增加,氮在各相中的溶解度增加,而且δ铁素体相区逐渐减小甚至消失,因此提高氮分压可避免合金体系在凝固过程中形成气孔.适当提高合金体系中奥氏体形成元素的含量,在合金体系凝固过程中氮溶解度较小的δ相区减小甚至消失,因此可减小氮在其凝固过程中的析出趋势.该模型的计算结果与前人的研究结果吻合得较好.

关键词: 氮溶解度, Fe-Cr-Mn, 高氮不锈钢, 热力学计算模型

Abstract: A thermodynamic model to calculate nitrogen solubility in different phases of Fe-Cr-Mn alloy system was developed on the basis of earlier works and regular melt model. The calculation results of 18Cr-18Mn alloy showed that the nitrogen solubility in different phases increases with increasing nitrogen partial pressure, and the δ ferrite zone becomes smaller even disappears. So increasing nitrogen partial pressure can prevent the porosity forming during solidification. Increasing properly the contents of component elements of austenite in the melts, the δ ferrite zone where the nitrogen solubility is low becomes smaller even disappears during the solidification of the melt, thus decreasing the potential nitrogen precipitates during solidification. The calculation results are in good agreement with what were done in earlier works.

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