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首页 > 过刊浏览>2021年第44卷第6期 >127-136. DOI:10.11835/j.issn.1000-582X.2021.06.013
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长期时效对FGH96合金组织与力学性能的影响
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中图分类号:

TG136.2

基金项目:

国家科技重大专项资助项目（2017-VI-0009-0079）。


Effect of long-term aging on the microstructure andmechanical properties of FGH96 superalloy
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    摘要:

    研究了长期时效热处理制度对FGH96合金的显微组织、析出相、拉伸性能、持久性能及蠕变性能的影响。采用光学显微镜分析了合金的晶粒组织，用扫描和透射电镜分析了γ'相、碳化物和硼化物的形貌、尺寸和含量。通过力学性能测试分析了拉伸、持久和蠕变性能。结果表明在时效温度550℃和650℃下，时效时间在100 h至7 500 h变化时，FGH96合金的晶粒尺寸、γ'相形貌尺寸、MC型碳化物和M3B2型硼化物相含量、拉伸性能、持久性能等基本保持不变。时效温度为650℃时，随着时效时间的延长，γ'相及Cr23C6碳化物的含量相比550℃略有增大，导致蠕变性能降低，残余应变增大。

    Abstract:

    The mechanical properties of FGH96 superalloy after long-term aging were studied with tensile tests, stress rupture tests, and creep tests. The microstructure and precipitation phases were investigated by optical microscopy (OM), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Results show that at the condition of aging temperature of 550 ℃ and 650 ℃, aging time from 100 h to 7 500 h, the grain size, morphology of γ' phase, fraction of MC plus M3B2 phases, tensile properties, and rupture strength of the FGH96 superalloy after long-term aging keep nearly the same with those before long-term aging. The factions of γ' phase and Cr23C6 phase increase with increasing aging time at 650 ℃ while they remain almost unchanged at 550 ℃, which leads to the increasing residual strain of creep deformation for the 650 ℃ aged FGH96 superalloy.

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周晓明,王志彪,冯业飞,曾维虎.长期时效对FGH96合金组织与力学性能的影响[J].重庆大学学报,2021,44(6):127-136.

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  • 收稿日期:2021-02-28
  • 在线发布日期: 2021-06-10
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