| 应变速率对管线钢在碱性溶液中应力腐蚀行为的影响 |
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| 引用本文： | 张亮,李晓刚,杜翠薇,方伟. 应变速率对管线钢在碱性溶液中应力腐蚀行为的影响[J]. 钢铁研究学报, 2009, 21(10): 55-55 |
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| 作者姓名： | 张亮 李晓刚 杜翠薇 方伟 |
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| 作者单位： | 北京科技大学腐蚀与防护中心,北京,100083 |
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| 基金项目： | 国家科技基础条件平台建设资助项目，国家十一五科技支撑计划资助项目 |
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| 摘 要： | 主要研究了不同应变速率对X70管线钢在库尔勒土壤模拟溶液中应力腐蚀行为的影响.采用慢应变速率拉伸实验(SSRT)研究了不同应变速率下X70管线钢在模拟溶液中应力腐蚀开裂行为,并利用扫描电镜分析了不同应变速率下的断面形貌.结果表明,应变速率(特别是局部应变速率)对X70管线钢在库尔勒土壤模拟溶液中应力腐蚀行为有重要影响,应变速率在5×10-7～5×10-6s-1之间有较强的应力腐蚀开裂敏感性,在裂纹扩展不同阶段氢和阳极溶解交互作用相对贡献大小不同.
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| 关 键 词： | 管线钢 应力腐蚀开裂 应变速率 |
| 收稿时间： | 2008-05-26; |
The Effect of Strain Rate on Stress Corrosion Cracking Behavior of Pipeline Steel in Alkali Simulated Solution |
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| Abstract: | The effect of strain rate on stress corrosion cracking (SCC) behavior of X70 pipeline steel in simulated Kuer’le soil solution was investigated by using slow strain rate testing (SSRT). The morphologies of X70 pipeline steel fracture surface with different strain rate were analyzed by Scanning Electron Microscope (SEM). The results showed that strain rate had greatly influenced on SCC of X70 steel. X70 steel was susceptibility to SCC with strain rate from 5E-7s-1 to 5E-6s-1 in simulated solution. On the different stages of crack growth, the relative contribution of interaction between hydrogen and anodic dissolution is different. |
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| Keywords: | pipeline steel stress corrosion cracking strain rate |
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