| U形管换热器开裂原因分析 |
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| 引用本文： | 张礼敬,胡蓝亚.U形管换热器开裂原因分析[J].化工机械,1999,26(6):335-338. |
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| 作者姓名： | 张礼敬 胡蓝亚 |
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| 作者单位： | [1]南京化工大学 [2]南京炼油厂 |
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| 摘 要： | 借助光学和扫描电子显微镜，从材料成分、微观组织和性能角度，分析了Ｕ 形管换热器开裂原因。这是一种典型的应力腐蚀开裂，裂纹从管内壁开始向外壁扩展。３２１不锈钢在此工作条件下的耐蚀性好于３０４ 不锈钢。建议采用Ｃｒ Ｍｏ 钢，并从工艺上控制Ｃｌ－ 和Ｓ２－ 的数量。
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| 关 键 词： | U形管换热器 321不锈钢 应力腐蚀 304不锈钢 |
Cracking cause analysis of the U shaped tube heat exchangers. |
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| Zhang Lijing,Ling Xiang,Tu Shandong.Cracking cause analysis of the U shaped tube heat exchangers.[J].Chemical Engineering & Machinery,1999,26(6):335-338. |
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| Authors: | Zhang Lijing Ling Xiang Tu Shandong |
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| Abstract: | The cracking causes of a U shaped tube heat exchanger were analysed in material compositions,microstructure,properties with the help of optional microscope and SEM.The result shows that it was a typical SCC,the cracks were propogated from the internal wall to the external wall.The corrosion resistance of 321 stainless steel was better than that of 304 stainless steel under the working condition.Cr Mo steel should be selected,the quantities of Cl - and S 2- should be limited in process. |
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| Keywords: | U Shaped Tube Heat Exchanger 321 Stainless Steel Stress Corrosion 304 Stainless Steel |
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