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Effect of Heat Treatment on Microstructure and Mechanical Properties of GH4169 Superalloy

Effect of Heat Treatment on Microstructure and Mechanical Properties of GH4169 Superalloy
Fund Project:

National Important Base Research and Development Program (2010CB631203)

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    摘要:

    研究了4种热处理制度对GH4169合金显微组织、室温拉伸、650 ℃拉伸和持久性能的影响。结果表明:980 ℃固溶加两阶段时效处理,合金的室温和650 ℃拉伸的屈服强度和抗拉强度最高;960 ℃固溶加两阶段时效处理,合金的持久寿命最长。固溶处理调整d相的含量,主要强化相g"在720 ℃时效时析出,辅助强化相g'在620 ℃时效析出。

    Abstract:

    The effects of the solution and aging treatment on the microstructure, the tensile properties at room-temperature and 650 oC and the stress rupture of GH4169 superalloy were investigated. The results show that after solution at 980 oC and aging at 720 oC plus 620 oC, both the yield strength and ultimate strength of the superalloy at room-temperature and 650 oC are highest; after solution at 960 oC and aging at 720 oC plus 620 oC, the stress rupture life of the superalloy tested at 650 oC and 725 MPa is the longest; the solution treatment can adjust the amount of d phase, primary strengthening g" phase precipitates upon aging at 720 oC, while assistant strengthening g ' phase precipitates at 620 oC.

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杜金辉,吕旭东,邓 群. Effect of Heat Treatment on Microstructure and Mechanical Properties of GH4169 Superalloy[J].稀有金属材料与工程,2014,43(8):1830~1834.[Du Jinhui, Lü Xudong, Deng Qun. Effect of Heat Treatment on Microstructure and Mechanical Properties of GH4169 Superalloy[J]. Rare Metal Materials and Engineering,2014,43(8):1830~1834.]
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  • 收稿日期:2013-10-14
  • 在线发布日期: 2015-01-04