| 316L不锈钢换热器的失效原因分析 |
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| 引用本文： | 骆素珍,彭建国. 316L不锈钢换热器的失效原因分析[J]. 宝钢技术, 2007, 0(4): 24-28 |
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| 作者姓名： | 骆素珍 彭建国 |
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| 作者单位： | 宝钢研究院,不锈钢研究所,上海,201900;宝钢研究院,不锈钢研究所,上海,201900 |
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| 摘 要： | 利用化学法、金相法、SEM和EDX等方法,分析了苯酚中间再沸器316L不锈钢换热器管束和筒体失效材料的化学成分、显微组织、夹杂物水平、腐蚀产物的成分和裂纹形貌等.结果表明316L不锈钢的化学成分、显微组织和夹杂物都符合标准,换热器管束和筒体失效的主要原因是Cl-诱导的应力腐蚀开裂,此外,苯酚在裂纹处的结晶与溶解加速了应力腐蚀裂纹的扩展.针对上述应力腐蚀问题提出了相应的改进措施.
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| 关 键 词： | 不锈钢 换热器 应力腐蚀开裂 |
| 文章编号： | 1008-0716（2007）04-0024-05 |
| 修稿时间： | 2007-05-122007-06-07 |
Failure Analysis of 316L Stainless Steel Heat Exchanger |
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| Luo Suzhen,Peng Jianguo. Failure Analysis of 316L Stainless Steel Heat Exchanger[J]. Baosteel Technology, 2007, 0(4): 24-28 |
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| Authors: | Luo Suzhen Peng Jianguo |
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| Affiliation: | Stainless Steel Div. ,Baosteel Research Institute, Shanghai 201900, China |
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| Abstract: | The chemical composition,microstructure,inclusion level,corrosion products and crack morphology of 316L stainless steel used in heat exchanger phenol middle reboiler's tubes were investigated by means of chemical method,metallography,SEM,EDX and so on.The results show that the chemical composition,microstructure and inclusion level coincided with the related standards.The failure of heat exchanger's tubes was due to stress corrosion cracking which was induced by Cl-.And the crystallization and dissolution of phenol at cracks accelerated the propagation of stress corrosion cracking.Responding measures for improvement were proposed to solve problems mentioned above. |
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| Keywords: | stainless steel heat exchanger stress corrosion cracking |
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