| 外压型不锈钢波纹管膨胀节开裂分析 |
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| 引用本文： | 李小东,郝习云,陈进,孙晓明.外压型不锈钢波纹管膨胀节开裂分析[J].理化检验(物理分册),2011(3):187-188,191. |
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| 作者姓名： | 李小东 郝习云 陈进 孙晓明 |
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| 作者单位： | 华东理工大学机械与动力工程学院; |
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| 摘 要： | 奥氏体不锈钢外压轴向型波纹管膨胀节在使用较短时间后发生了开裂。采用化学成分分析、金相检验和断口分析等方法对开裂的原因进行了分析。结果表明:波纹管膨胀节的工作介质过热蒸汽中含有腐蚀性氯离子,在服役环境下受到拉伸应力的作用,导致其发生了应力腐蚀开裂。
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| 关 键 词： | 波纹管膨胀节 奥氏体不锈钢 应力腐蚀开裂 |
Cracking Analysis of External Pressure Stainless Steel Bellows Expansion-joint |
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| LI Xiao-dong,HAO Xi-yun,CHEN Jin,SUN Xiao-ming.Cracking Analysis of External Pressure Stainless Steel Bellows Expansion-joint[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2011(3):187-188,191. |
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| Authors: | LI Xiao-dong HAO Xi-yun CHEN Jin SUN Xiao-ming |
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| Affiliation: | LI Xiao-dong,HAO Xi-yun,CHEN Jin,SUN Xiao-ming(School of Mechanical and Power Engineering,East China University of Science and Technology,Shanghai 200237,China) |
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| Abstract: | External pressure axial type bellows expansion joint of austenitic stainless steel cracked after using for short time.The cracking reason was analyzed by means of chemical composition analysis,metallographic examination and fracture analysis.The results showed that superheated steam of working medium in the expansion-joint contained corrosive chloride ions,and the expansion-joint was affected by tensile stress,which resulted in stress corrosion cracking. |
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| Keywords: | bellows expansion-joint austenitic stainless steel stress corrosion cracking |
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