固溶温度对含铪高钨K416B镍基高温合金组织的影响

侯桂臣 苏海军 谢君 荀淑玲 于金江 孙晓峰 周亦胄

侯桂臣, 苏海军, 谢君, 荀淑玲, 于金江, 孙晓峰, 周亦胄. 固溶温度对含铪高钨K416B镍基高温合金组织的影响[J]. 航空材料学报, 2019, 39(3): 62-68. doi: 10.11868/j.issn.1005-5053.2018.000086
引用本文: 侯桂臣, 苏海军, 谢君, 荀淑玲, 于金江, 孙晓峰, 周亦胄. 固溶温度对含铪高钨K416B镍基高温合金组织的影响[J]. 航空材料学报, 2019, 39(3): 62-68. doi: 10.11868/j.issn.1005-5053.2018.000086
Guichen HOU, Haijun SU, Jun XIE, Shuling XUN, Jinjiang YU, Xiaofeng SUN, Yizhou ZHOU. Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content[J]. Journal of Aeronautical Materials, 2019, 39(3): 62-68. doi: 10.11868/j.issn.1005-5053.2018.000086
Citation: Guichen HOU, Haijun SU, Jun XIE, Shuling XUN, Jinjiang YU, Xiaofeng SUN, Yizhou ZHOU. Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content[J]. Journal of Aeronautical Materials, 2019, 39(3): 62-68. doi: 10.11868/j.issn.1005-5053.2018.000086

固溶温度对含铪高钨K416B镍基高温合金组织的影响

doi: 10.11868/j.issn.1005-5053.2018.000086
基金项目: 国家重点基础研究发展计划(973)(2010CB631200,2010CB631206);国家自然科学基金51701212,50931004,51571196,51601192,51671188);凝固技术国家重点实验室开放课题(SKLSP201747)
详细信息
    通讯作者:

    谢君(1986—),男,博士,副研究员,主要从事高温合金组织与性能控制及纯净化冶炼技术研究,(E-mail)junxie@imr.ac.cn

  • 中图分类号: TG113.12

Effect of solid solution temperature on microstructure of Hf-containing K416B Ni-based superalloy with high W-content

  • 摘要: 通过对含铪高钨K416B镍基高温合金进行不同温度固溶处理后的组织形貌观察,研究固溶温度对K416B合金组织的影响。结果表明:随着固溶温度的升高,在合金元素的扩散作用下,合金中的二次枝晶尺寸略有增大,使枝晶间的共晶含量逐渐减少,促使合金组织致密化;同时合金中的γ′相发生溶解,使其尺寸减小;在高温固溶处理期间,枝晶间区域的初生条状MC相发生分解形成粒状M6C碳化物;而共晶处的大尺寸块状M6C相形态与数量无明显变化;固溶处理使偏聚于枝晶干的元素W向枝晶间扩散,而Hf、Nb、Ti和Cr元素向枝晶干扩散,大幅降低合金各元素的偏析程度。组织研究结果表明,1220 ℃保温4 h为合金组织状态最佳的固溶热处理工艺。

     

  • 图  1  不同温度固溶合金的枝晶形貌 (a)铸态;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    Figure  1.  Dendrite morphologies of solid solution alloy at different temperatures (a)as-cast;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    图  2  不同温度固溶合金的共晶形貌 (a)铸态;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    Figure  2.  Eutectic morphologies of solid solution alloy at different temperatures (a)as-cast;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    图  3  不同温度固溶处理合金中枝晶间区域的碳化物形貌 (a)铸态;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    Figure  3.  Carbide morphologies of inter-dendrite region in the alloy treated in solid solution at different temperatures (a)as-cast;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    图  4  固溶前后合金的中碳化物的TEM形貌 (a)铸态;(b)1220 ℃固溶

    Figure  4.  TEM morphologies of carbides in the alloy before and after solid solution treatment (a)as-cast;(b)solid solution at 1220 ℃

    图  5  不同温度固溶处理合金中共晶处的碳化物形貌 (a)铸态;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    Figure  5.  Morphologies of carbides in the eutectic region of the alloy treated in solid solution at different temperatures (a)as-cast;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    图  6  不同温度固溶处理合金中枝晶干区域的γ′相形貌 (a)铸态;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    Figure  6.  Morphologies of γ′ phase in dendritic stem region of the alloy treated in solid solution at different temperatures (a)as-cast;(b)1180 ℃;(c)1200 ℃;(d)1220 ℃

    图  7  不同状态合金中元素偏析系数分布图

    Figure  7.  Distribution of element segregation coefficient in the alloy at different states

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出版历程
  • 收稿日期:  2018-08-02
  • 修回日期:  2018-09-21
  • 网络出版日期:  2019-04-03
  • 刊出日期:  2019-06-01

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