东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2012, Vol. 33 ›› Issue (9): 1274-1277.DOI: -

• 论著 • 上一篇    下一篇

新型钴基高温合金γ和γ′相行为的热力学分析

杨舒宇;蒋敏;王磊;   

  1. 东北大学 材料各向异性与织构教育部重点实验室;
  • 收稿日期:2013-06-19 修回日期:2013-06-19 出版日期:2012-09-15 发布日期:2013-04-04
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家自然科学基金资助项目(50771027)

Thermodynamic analysis of γ and γ′ phases in new-type co-based superalloy

Yang, Shu-Yu (1); Jiang, Min (1); Wang, Lei (1)   

  1. (1) Key Laboratory for Anisotropy and Texture of Materials, Ministry of Education, Northeastern University, Shenyang 110819, China
  • Received:2013-06-19 Revised:2013-06-19 Online:2012-09-15 Published:2013-04-04
  • Contact: Jiang, M.
  • About author:-
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摘要： 采用热力学分析方法,对新型钴基高温合金Co-Ni-Al-W-Cr多元系中γ′相的析出规律进行了研究,分析了合金元素Ni,Al,W在γ和γ′相间的分配行为,阐述了Ni在γ和γ′相间的分配系数对合金强化效果的影响规律.结果表明:合金元素Ni明显提高γ′相热力学稳定性,随Ni含量的增加,γ′相的成分范围扩大,定存在温度提高,说明Ni有利于提高Co-Al-W基高温合金的高温性能;计算分析了合金元素在γ和γ′相间分配行为及其对合金强化的影响规律.探明Co-Ni-Al-W-Cr合金中x(Al)/x(W)对合金元素Ni的分配系数KγN′i/γ影响较大,当Al,W原子分数比值为2.60时,KγN′i/γ达到最...

关键词: 热力学分析, 合金强化, γ′-Co3(Al, W), 合金设计, 新型钴基高温合金

Abstract: The precipitation behaviors of γ′ phases and distribution coefficients of Ni, Al and W between γ and γ′ phases in the Co-Ni-Al-W-Cr alloy were studied by thermodynamic analysis method. The effect of distribution coefficient of Ni between γ and γ′ phases on the alloy strengthening was also discussed. The results show that the stability of the γ′ phase can be enhanced by the addition of Ni. The homogeneity range of the γ′ phase can be enlarged with the increasing of Ni content, which shows that Ni can improve the working temperature of the Co-Al-W-based superalloys. In Co-Al-W-Ni-Cr alloys, the x(Al)/x(W) ratio has an effect on the distribution coefficient KNiγ′/γ of Ni between γ and γ′ phases. KNiγ′/γ has a maximum value of 1.24 when x(Al)/x(W) ratio is 2.60. The results can be used for the developing new-type Co-based superalloy.

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