| 210MW汽轮机次末级叶片断裂分析及对策 |
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| 引用本文： | 林国强,张建迅,朱振龙,王亚璐,池永滨.210MW汽轮机次末级叶片断裂分析及对策[J].黑龙江电力,1995(1). |
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| 作者姓名： | 林国强 张建迅 朱振龙 王亚璐 池永滨 |
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| 作者单位： | 黑龙江省电力试验研究所!150030 |
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| 摘 要： | 通过时断裂叶片的宏观检验、金相硬度及电子显微镜扫描断口分析试验、查出断裂是由叶片进汽侧局部水蚀较重促成该部位的应力集中而引发裂纹，裂纹在金属内以疲劳形式扩展最终导致断裂，解决措施为在进汽侧端面再延续钎焊两片硬质合金并对其运行进行严格监督。
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| 关 键 词： | 210MW汽轮机 叶片断裂 水蚀 应力集中 裂纹疲劳扩展 |
A Fracture Analysis of Sub-Final Blades in the 210MW Turbine and Countermeasures |
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| Lin Guoqiang, Zhang Jianxun, Zhu Zhenlong, Wang Yalu, Chi Yongbin.A Fracture Analysis of Sub-Final Blades in the 210MW Turbine and Countermeasures[J].Heilongjiang Electric Power,1995(1). |
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| Authors: | Lin Guoqiang Zhang Jianxun Zhu Zhenlong Wang Yalu Chi Yongbin |
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| Affiliation: | (Heilongjiang Electric Power Test and Research Institute)Lin Guoqiang; Zhang Jianxun; Zhu Zhenlong; Wang Yalu; Chi Yongbin) |
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| Abstract: | The fractures of the 210 MW turbine sub-final blades are caused by fatigue propagation of the cracks located at the steam inlet side where erosion is moreserious,and it is also the stress concentration point. This result is obtained fromfracture analysis of the broken sub-final blades by means of micro-inspection,metallographic examination,hardness testing and SEM fracture analysis. The measures to cope with the problem is to braze two more pieces of hard metal alloy following the originals,and strict supervision should be taken during operation. |
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| Keywords: | 210 MW Turbine Blade fracture Water Erosion Stress concentration Fatigue Propagation of crack |
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