| OCr18Ni9换热器应力腐蚀开裂失效分析 |
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| 引用本文： | 上官丰收,牛建文,刘强,陈兵. OCr18Ni9换热器应力腐蚀开裂失效分析[J]. 化工装备技术, 2011, 32(6): 46-48 |
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| 作者姓名： | 上官丰收 牛建文 刘强 陈兵 |
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| 作者单位： | 1. 中国石油管工程技术研究院
2. 中国石油长庆油田 |
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| 摘 要： | 某厂锅炉给水预热器在投入使用3.5年后,管箱外壁近横焊缝处发现裂纹.该换热器设计材质为0Cr18Ni9,截取含有裂纹的试样,进行化学成分分析、金相分析、硬度检测、拉伸强度测试、裂纹分析和扫描电子显微镜分析.材质Cr元素含量17.75％,硬度306HV10,这两项检测结果不符合GB/T 4237-2007《不锈钢热轧钢板...
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| 关 键 词： | 换热器 0Cr18Ni9 化学成分 硬度 应力腐蚀 |
Failure Analysis on Stress Corrosion Cracking of 0Cr18Ni9 Heat-exchanger |
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| Shangguan Fe ngshou,Niu Jianwen,Liu Qiang,Cheng Bing. Failure Analysis on Stress Corrosion Cracking of 0Cr18Ni9 Heat-exchanger[J]. Chemical Equipment Technology, 2011, 32(6): 46-48 |
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| Authors: | Shangguan Fe ngshou Niu Jianwen Liu Qiang Cheng Bing |
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| Affiliation: | Shangguan Fengshou Niu Jianwen Liu Qiang Cheng Bing |
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| Abstract: | After 3.5 years service,cracks were found on horizontal weld of shell wall of a boiler feed water preheater.The heat-exchanger was made of 0Cr18Ni9.Samples containing cracks were cut for chemical composition analysis,metallographic analysis,hardness testing,tensile testing,cracks analysis and scanning electron microscopy analysis.Two results didn’t meet the requirement of GB / T 4237—2007——stainless steel hot-rolled steel sheet and strip,that’s the content of Cr(17.75%) and the hardness 306 HV10;and S element was found on the crack surface.Stress corrosion was the main reason for the failure. |
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| Keywords: | Heat-exchanger 0Cr18Ni9 Chemical composition Hardness Stress corrosion |
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