| 激光冲击处理对X70管线钢焊接接头H_2S应力腐蚀影响 |
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| 引用本文： | 孔德军,吴永忠,龙丹,周朝政.激光冲击处理对X70管线钢焊接接头H_2S应力腐蚀影响[J].中国腐蚀与防护学报,2011(2). |
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| 作者姓名： | 孔德军 吴永忠 龙丹 周朝政 |
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| 作者单位： | 常州大学机械工程学院; |
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| 基金项目： | 江苏省自然科学基金项目(BK2009104)资助 |
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| 摘 要： | 采用慢应变速率法(SSRT)进行了X70管线钢焊接接头在H2S介质中应力腐蚀试验,研究了H2S对X70管线钢焊接接头应力腐蚀开裂(SSCC)的敏感性,分析了激光冲击处理对X70管线钢焊接接头抗H2S应力腐蚀开裂SSCC行为的影响。结果表明,经激光冲击处理后X70管线钢焊接接头表面产生了晶粒细化和残余压应力,提高了管线钢焊接接头在NACE饱和H_2S溶液中抗应力腐蚀性能;原始状态试样在NACE饱和H_2S溶液中慢拉伸试验平均应力腐蚀敏感性指数>25%,有明显的应力腐蚀倾向;经激光冲击处理后试样在NACE饱和H_2S溶液中平均应力腐蚀敏感性指数为19.05%,应力腐蚀倾向不明显,因此,激光冲击处理有效地提高了X70管线钢焊接接头的抗应力腐蚀性能。
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| 关 键 词： | X70管线钢 焊接接头 H_2S 应力腐蚀 残余应力 |
EFFECTS OF LASER SHOCK PROCESSING ON H_2S STRESS CORROSION OF X70 PIPELINE STEEL WELDED JOINT |
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| KONG Dejun,WU Yongzhong,LONG Dan,ZHOU Zhaozheng College of Mechanical Engineering,Changzhou University,Changzhou.EFFECTS OF LASER SHOCK PROCESSING ON H_2S STRESS CORROSION OF X70 PIPELINE STEEL WELDED JOINT[J].Journal of Chinese Society For Corrosion and Protection,2011(2). |
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| Authors: | KONG Dejun WU Yongzhong LONG Dan ZHOU Zhaozheng College of Mechanical Engineering Changzhou University Changzhou |
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| Affiliation: | KONG Dejun,WU Yongzhong,LONG Dan,ZHOU Zhaozheng College of Mechanical Engineering,Changzhou University,Changzhou 213016 |
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| Abstract: | The stress corrosion of X70 pipeline welded joint in H_2S medium was tested with slow strain rate testing(SSRT),the effect of H_2S on sulfide stress corrosion cracking(SSCC)for X70 pipeline welded joint was investigated,and the effect of laser shock processing on SSCC for X70 pipeline welded joint was analyzed. The experimental results showed that the grain refinement and compressive residual stress are produced in the surface of X70 pipeline steel welded joint by laser shock processing,thus increasing the ... |
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| Keywords: | X70 pipeline steel welded joint H_2S stress corrosion residual stress |
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