东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2005, Vol. 26 ›› Issue (4): 253-256.DOI: -

• 论著 • 上一篇    下一篇

镍基高温合金长期时效过程中第二相的析出

张小彬;刘常升;吕俊英;杨洪才   

  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
  • 收稿日期:2013-06-24 修回日期:2013-06-24 出版日期:2005-04-15 发布日期:2013-06-24
  • 通讯作者: Zhang, X.-B.
  • 作者简介:-
  • 基金资助:
    国家十五科技攻关专项(0050390B)·

Secondarily precipitated phases of a Ni-based superalloy during durable thermal treatment

Zhang, Xiao-Bin (1); Liu, Chang-Sheng (1); Lu, Jun-Ying (1); Yang, Hong-Cai (1)   

  1. (1) Sch. of Mat. and Metall., Northeastern Univ., Shenyang 110004, China
  • Received:2013-06-24 Revised:2013-06-24 Online:2005-04-15 Published:2013-06-24
  • Contact: Zhang, X.-B.
  • About author:-
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摘要： 为考察合金在高温长期时效过程中的组织变化情况,使合金分别在800℃,900℃进行了100～1000h的长期时效,并对由镍基基体上析出的第二相粒子利用扫描电镜、透射电镜、电子探针等测试手段进行了观察与分析·发现碳化物和TCP相的析出有着类似之处,都在800℃时效时比在更高温度时效容易析出,颗粒尺寸也大于900℃时效时的尺寸;观察到析出碳化物种类有M23C6型、M7C3型;TCP相种类有μ相、σ相·通过测量γ′相的平均半径得到其析出特性符合里夫希茨·瓦格纳的第二相粒子成熟理论·相与组织的准确确定,为其后确定合金的拉伸与持久性能提供了有力的分析基础·

关键词: 高温合金, 长期时效, 碳化物, TCP相, γ′相

Abstract: A Ni-based superalloy was heated as durable ageing treatment at 800°C and 900°C for 100-1000 hr to observe its change in microstructures. Further, the samples of secondarily precipitated phases in the aging treatment process were analyzed by means of SEM, TEM and electro-probe. It was found that both the carbide and TCP-phase precipitates are easier to be precipitated at 800°C than at higher temperature and their particle sizes are bigger at 800°C than at 900 °C. The types of precipitated carbides are M23C6 and M7C3 phases, while those of TCP phases are μ and σ. The average radius of γ′-phase grains, as measured, provides such a conclusion that their precipitation behavior is coincident with Liftshitz-Wagner theory. As a result, the investigation as above offers a foundation on which the examination of tensile and duration properties are available.

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