东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2003, Vol. 24 ›› Issue (7): 670-672.DOI: -

• 论著 • 上一篇    下一篇

过滤净化对K640S返回料力学性能的影响

王铁利;杨洪才;葛雯;郭建亭   

  1. 东北大学材料与冶金学院;东北大学材料与冶金学院;沈阳航空工业学院;中国科学院金属研究所 辽宁沈阳　110004
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2003-07-15 发布日期:2013-06-24
  • 通讯作者: Wang, T.-L.
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划资助项目(715 005 0030);;国家重大基金资助项目(59895152)·

Effect of filtration on mechanical properties of cobalt-base superalloy K640S

Wang, Tie-Li (1); Yang, Hong-Cai (1); Ge, Wen (2); Guo, Jian-Ting (3)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China; (2) Shenyang Inst. of Aero. Eng., Shenyang 110034, China; (3) Inst. of Metal Res., Chinese Acad. of Sci., Shenyang 110015, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2003-07-15 Published:2013-06-24
  • Contact: Wang, T.-L.
  • About author:-
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摘要： 对铸造钴基高温合金K640S返回合金进行过滤净化处理,测试合金化学成分、拉伸性能和蠕变性能·结果表明:过滤明显降低合金中的O、N元素的质量分数,而其他主要元素质量分数没有变化·过滤对合金拉伸性能没有明显影响·在815℃、205MPa条件下,过滤合金与未过滤合金相比,蠕变寿命从34h提高到64h·过滤后合金组织中显微疏松明显减少·可见,返回合金经过滤处理后,其性能已达到新料的性能水平·

关键词: 钴基高温合金, 返回熔炼, 过滤, 显微组织, 力学性能

Abstract: Effect of filtration on composition, microstructure and mechanical properties of cobalt-base superalloy K640S was investigated. The results show that the filtration treatment can effectively decrease the content of O and N elements and increase creep life of the recycled superalloy K640S remarkably at the condition of 815°C , 205 MPa. But, the filtration treatment has no influence on the tensile property of the superalloy. The microstructure of the virgin superalloy K640S and the filtration treated recycle alloy consist of the same skeleton-like carbides in form of M23C6 and the flake-like carbides in form of M7C3 distributed among the dendrites and at grain boundary in r matrix. From the present data, it is suggested that superalloy K640S can still offer payoffs as a structural material in gas turbine application after filtration recycle.

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