| 高炉煤气能量回收透平转子二级叶片失效分析 |
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| 引用本文： | 陈常义,姚戈,陈江.高炉煤气能量回收透平转子二级叶片失效分析[J].机械工程材料,2012(3):93-96. |
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| 作者姓名： | 陈常义 姚戈 陈江 |
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| 作者单位： | 沈阳大陆激光技术有限公司;中国科学院金属研究所 |
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| 摘 要： | 对某公司断裂失效的高炉煤气能量回收透平转子二级叶片的宏观形貌、化学成分、硬度、断口、显微组织进行了观察和分析,以找出其失效的原因。结果表明:叶片断裂属于疲劳断裂,疲劳裂纹起始于叶片进气边;叶片断裂的原因为所用材料与常规设计材料不同,且采取的热处理工艺不当;叶片表面由颗粒冲蚀产生的大量凹坑促进了疲劳裂纹的萌生,是疲劳裂纹形成的外因。
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| 关 键 词： | 高炉煤气能量回收透平(TRT) 转子 二级叶片 失效分析 |
Failure Analysis of Rotor Two-Stage Blade in Blast Furnace Gas Energy Recovery Turbine |
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| CHEN Chang-yi,YAO Ge,CHEN Jiang.Failure Analysis of Rotor Two-Stage Blade in Blast Furnace Gas Energy Recovery Turbine[J].Materials For Mechanical Engineering,2012(3):93-96. |
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| Authors: | CHEN Chang-yi YAO Ge CHEN Jiang |
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| Affiliation: | 1(1.Dalu Laser Technology Co.,Ltd.Shenyang 110136,China;2.Institute of Metal Research, The Chinese Academy of Sciences,Shenyang 110016,China) |
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| Abstract: | The macrophotos,chemical composition,hardness,fracture and microstructure of the failed rotor two-stage blade in a blast furnace gas energy recovery turbine were observed and analyzed to find the failure causes.The results show that the blade fracture was fatigue fracture,and fatigue cracks initiared at the side of air inlet of the blade.The cause of the blade fracture was that the used material was different from the conventional design material and the heat treatment process was inappropriate.Blade surface was eroded by particles and thus formed a large number pits to promote the initiation of fatigure cracks,and this was the external cause of fatigure crack formation. |
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| Keywords: | blast-furnace gas energy recovery turbine(TRT) rotor two-stage blade failure analysis |
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