某燃气轮机涡轮叶片长期服役后的微观组织与性能

doi:10.13251/j.issn.0254-6051.2021.06.042

金属热处理 ›› 2021, Vol. 46 ›› Issue (6): 213-220.DOI: 10.13251/j.issn.0254-6051.2021.06.042

某燃气轮机涡轮叶片长期服役后的微观组织与性能

杨晋萍¹, 宋国斌¹, 董勇军², 崔崇², 段文峰³, 石全强^4,5, 单以银^4,5

1.国电华北电力有限公司, 北京 100070;
2.国电科学技术研究院有限公司,江苏南京 210023;
3.辽宁科技大学材料与冶金学院, 辽宁鞍山 114051;
4.中国科学院金属研究所师昌绪先进材料创新中心, 辽宁沈阳 110016;
5.中国科学院金属研究所中国科学院核用材料与安全评价重点实验室, 辽宁沈阳 110016

收稿日期:2021-01-20 出版日期:2021-06-25 发布日期:2021-07-21
通讯作者: 石全强,副研究员,博士,E-mail:qqshi12b@imr.ac.cn
作者简介:杨晋萍(1974—),女,高级工程师,主要研究方向为燃气轮机发电设备的管理与维护,E-mail:yjp66@126.com。

Microstructure and properties of a gas turbine blade after long-term service

Yang Jinping¹, Song Guobin¹, Dong Yongjun², Cui Chong², Duan Wenfeng³, Shi Quanqiang^4,5, Shan Yiyin^4,5

1. Guodian North China Power Co., Ltd., Beijing 100070, China;
2. Guodian Research Institute of Science and Technology Co., Ltd., Nanjing Jiangsu 210023, China;
3. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan Liaoning 114051, China;
4. Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang Liaoning 110016, China;
5. Key Laboratory of Nuclear Materials and Safety Assessment, Institute of Metal Research, Chinese Academy of Sciences, Shenyang Liaoning 110016, China

Received:2021-01-20 Online:2021-06-25 Published:2021-07-21

摘要/Abstract

摘要： 研究了服役45 000 h后的燃气轮机叶片不同部位微观组织与持久性能的退化行为。试验结果表明:长时服役后,叶片榫齿部位的微观组织未发生明显的退化损伤,叶片叶尖部位的微观组织则发生明显的退化,其中MC型碳化物发生退化分解,立方状γ′相退化成粗大的球状γ′相。长时服役后,叶片的硬度没有发生明显的变化,而蠕变持久性能明显降低,该燃气轮机叶片在850 ℃下10⁵ h的外推持久强度降低至66.72 MPa。

关键词: 燃气轮机叶片, 显微组织, γ′相, 蠕变持久性能

Abstract: Microstructure and creep rupture property of a gas turbine blade at different positions after 45 000 h cumulative operation were researched. The experimental results show that the microstructure of the tenon tooth blade has no obvious degradation, however, the microstructure degrades obviously for the leading edge on the section near blade tip, in which the MC-type carbides are degraded and decomposed, and the cubic γ′ phase degenerates into coarse spherical γ′ phase. After long-term service, the blade hardness has no obvious change, however, the creep rupture strength reduces obviously and the extrapolation rupture strength of the gas turbine blade at 850 ℃ for 10⁵ h reduces to 66.72 MPa.

Key words: gas turbine blade, microstructure, γ′ phase, creep rupture property

中图分类号:

TG142.1

杨晋萍, 宋国斌, 董勇军, 崔崇, 段文峰, 石全强, 单以银. 某燃气轮机涡轮叶片长期服役后的微观组织与性能[J]. 金属热处理, 2021, 46(6): 213-220.

Yang Jinping, Song Guobin, Dong Yongjun, Cui Chong, Duan Wenfeng, Shi Quanqiang, Shan Yiyin. Microstructure and properties of a gas turbine blade after long-term service[J]. Heat Treatment of Metals, 2021, 46(6): 213-220.

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某燃气轮机涡轮叶片长期服役后的微观组织与性能

Microstructure and properties of a gas turbine blade after long-term service

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