| 蒸汽发生器传热管裂纹断口电子金相分析 |
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| 引用本文： | 姚祺峰,薛静,宋京凯.蒸汽发生器传热管裂纹断口电子金相分析[J].哈尔滨工程大学学报,2006,27(6):830-833. |
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| 作者姓名： | 姚祺峰 薛静 宋京凯 |
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| 作者单位： | 哈尔滨工程大学,动力与能源工程学院,黑龙江,哈尔滨,150001;哈尔滨工程大学,动力与能源工程学院,黑龙江,哈尔滨,150001;哈尔滨工程大学,动力与能源工程学院,黑龙江,哈尔滨,150001 |
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| 摘 要： | 为了判断某蒸汽发生器传热管的开裂性质和影响因素,用电子显微镜对该蒸汽发生器传热管管束裂纹进行断口电子金相分析.通过对管束大量电子断口的观察分析,证明了断口为准解理断裂,具有河流花样的特征.根据电子衍射和电子探针对管束断口腐蚀产物和夹杂物的分析计算,确定了腐蚀产物和夹杂物的成分.由断口形貌特征及对比试验可以确认该蒸汽发生器传热管管束发生应力腐蚀开裂,是一种脆性的穿晶断裂.
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| 关 键 词： | 蒸汽发生器 断口 金相分析 应力腐蚀 |
| 文章编号： | 1006-7043(2006)06-0830-04 |
| 修稿时间： | 2005年12月2日 |
Electron metallographic analysis of cracks of steam generator tubes |
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| YAO Qi-feng,XUE Jing,SONG Jing-kai.Electron metallographic analysis of cracks of steam generator tubes[J].Journal of Harbin Engineering University,2006,27(6):830-833. |
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| Authors: | YAO Qi-feng XUE Jing SONG Jing-kai |
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| Abstract: | In order to judge the cracks' characters and the influencing factors of steam generator tubes,electron metallographic analysis of cracks of a certain steam generator tube was made by electron microscope.According to analysis result of tubes' cracks fracture observation,it proves that the fracture is quasi-cleavage fracture which is characterized by river pattern.By analyzing the corrosion products and inclusion in the cracks by electron diffraction and electron microprobe,the composition of corrosion products and inclusion is ascertained.It can be ascertained from the tepograping of the cracks and the comparison test that the stress corrosion crack generated in the steam generater tube is a type of brittle transgranular fracture. |
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| Keywords: | steam generator cracks metallographic analysis stress corrosion |
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