| LMC法制备定向重型燃机叶片的组织性能研究 |
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| 引用本文： | 姜祥伟,李辉. LMC法制备定向重型燃机叶片的组织性能研究[J]. 铸造技术, 2012, 33(7): 807-810 |
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| 作者姓名： | 姜祥伟 李辉 |
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| 作者单位： | 中国科学院金属研究所高温合金研究部,辽宁沈阳,110016 |
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| 基金项目： | 国家重点基础研究项目，国家自然科学基金资助项目 |
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| 摘 要： | 利用金相和扫描电镜观察了液态金属冷却技术(LMC)制备的DSM11合金重型燃机叶片不同位置的定向凝固组织和热处理组织,并利用持久试验机测试了相应状态下980℃×220 MPa的持久性能。研究表明,随着叶片取样位置远离冷却盘,缩孔的尺寸增加,η相的析出倾向增大,γ+γ′共晶尺寸增加,导致了叶片不同位置热处理组织和持久性能的差异。
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| 关 键 词： | 重型燃机叶片 LMC工艺 定向凝固 显微组织 持久性能 |
Microstructure and Stress Rupture Property of Directionally Solidified Industrial Gas Turbine Blade Prepared by Liquid Metal Cooling |
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| JIANG Xiang-wei , LI Hui. Microstructure and Stress Rupture Property of Directionally Solidified Industrial Gas Turbine Blade Prepared by Liquid Metal Cooling[J]. Foundry Technology, 2012, 33(7): 807-810 |
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| Authors: | JIANG Xiang-wei LI Hui |
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| Affiliation: | (Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China) |
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| Abstract: | The as-cast and heat-treated directional solidified microstructures in different positions of DSM11 industrial gas turbine blade prepared by liquid metal cooling were studied by OPM and SEM,and the stress rupture property at 980 ℃×220 MPa was tested after different heat treatment.The results show that,with the increase of the distance of sampling position from the chill plate,the size of shrinkage and eutectic in as-cast blade enlarges,the separating tendency of phase increases.This leads to the differences of heat-treated microstructure and stress rupture property of the blades in different positions. |
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| Keywords: | industrial gas turbine blade liquid metal cooling process directionally solidified microstructure stress rupture property |
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