| U型管开裂失效分析 |
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| 引用本文： | 何家胜,危卫,彭丹柳,杨红,朱光强.U型管开裂失效分析[J].压力容器,2007,24(5):41-44. |
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| 作者姓名： | 何家胜 危卫 彭丹柳 杨红 朱光强 |
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| 作者单位： | 1. 武汉工程大学,机械工程学院,湖北,武汉,430074
2. 湖北宜化集团,楚星化工股份有限公司,湖北,宜昌,443311 |
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| 摘 要： | 采用金相分析、宏微观断口分析、能谱分析以及有限元分析等方法,对U型管弯头部分的开裂原因进行了分析和研究。分析结果表明,材料焊接热影响区的敏化效应、管内介质的腐蚀作用以及弯管振打块附近的应力集中导致该管发生了晶间应力腐蚀开裂。
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| 关 键 词： | 失效分析 敏化 晶间应力腐蚀开裂 有限元分析 |
| 文章编号： | 1001-4837（2007）05-0041-04 |
| 修稿时间： | 2006-12-182007-04-28 |
Failure Analysis of U-tube Fracture |
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| HE Jia-sheng,WEI Wei,PENG Dan-liu,YANG Hong,ZHU Guang-qiang.Failure Analysis of U-tube Fracture[J].Pressure Vessel Technology,2007,24(5):41-44. |
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| Authors: | HE Jia-sheng WEI Wei PENG Dan-liu YANG Hong ZHU Guang-qiang |
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| Affiliation: | 1. School of Mechanical Engineering, Wuhan Institute of Technology, Wuhan 430074, China; 2. Chuxing Chemical Co., Ltd., Hubei Yihua Group Corp., Yichang 443311, China |
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| Abstract: | In this paper, the cracking behavior of U - tube was studied by metallographic analysis, microstructure analysis, energy spectrum analysis of the corrosion product and finite element analysis of the failure samples. The results show that the microstructure near the welding heat affective zone is sensitized due to the welding process. Under the combined action of the stress concentration and corrosive medium, the intergranular stress corrosion cracking takes place in welding heat affective zone of the U - tube. |
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| Keywords: | failure analysis sensitized intergranular SCC finite element analysis |
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