| 涡轮机叶片早期断裂原因分析 |
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| 引用本文： | 李继康,李文成,王春芳,张淑兰. 涡轮机叶片早期断裂原因分析[J]. 物理测试, 2019, 37(2): 32-35. DOI: 10.13228/j.boyuan.issn1001-0777.20180040 |
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| 作者姓名： | 李继康 李文成 王春芳 张淑兰 |
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| 作者单位： | 钢铁研究总院中心实验室，北京 100081 |
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| 摘 要： | 采用金相、扫描电镜等手段分析了某企业 1Cr13钢涡轮机叶片过早断裂原因。结果表明，在裂纹起始部位，断口以沿晶断裂为主，间或少量穿晶解理或准解理。综合考虑送检叶片的介质条件和应力条件，认为其过早断裂系应力腐蚀所致。应力腐蚀裂纹形成后，除裂纹继续以应力腐蚀方式扩展外，还将叠加有疲劳扩展的成分。晶粒粗大提高了 1Cr13钢对应力腐蚀的敏感性，同时降低了材料的疲劳性能。
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| 关 键 词： | 1Cr13钢 断裂 应力腐蚀 疲劳 |
| 收稿时间： | 2018-05-14 |
Prematurefracturereasonanalysisofaturbineblade |
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| LI Ji-kang,LI Wen-cheng,WANG Chun-fang,ZHANG Shu-lan. Prematurefracturereasonanalysisofaturbineblade[J]. Physics Examination and Testing, 2019, 37(2): 32-35. DOI: 10.13228/j.boyuan.issn1001-0777.20180040 |
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| Authors: | LI Ji-kang LI Wen-cheng WANG Chun-fang ZHANG Shu-lan |
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| Affiliation: | Central Laboratory，Central Iron and Steel Research Institute，Beijing100081，China; |
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| Abstract: | The causes of premature fracture of aturbine blade made of 1Cr13 steel in a certain enterprise were analyzed by using optical metallography and scanning eletron microscope.The results show that the fracture surface morphology at the crack initiation site consists of intergranular fracture and a small amount of cleavage or quasi-cleavage fracture. Considering both the medium condition and stress conditionofthe inspectionblade，it is considered that thepremature fracture of the bladeis causedby stress corrosion.After the stress corrosioncrackisformed，the crack propagates with the manner of super position of both stress corrosion and fatigue.The coarse grain size increases the sensitivity of 1Cr13 steel to stress corrosion，and decreases the fatigue performance of the material. |
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| Keywords: | 1Cr13steel fracture stresscorrosion fatigue |
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