| 氢在高强度管道钢应力腐蚀中的作用 |
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| 引用本文： | 张涛,孙新岭,陈居术,龙军,林梅. 氢在高强度管道钢应力腐蚀中的作用[J]. 管道技术与设备, 2004, 0(2): 33-35 |
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| 作者姓名： | 张涛 孙新岭 陈居术 龙军 林梅 |
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| 作者单位： | 中国人民解放军后勤工程学院,重庆,400016 |
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| 摘 要： | 用显微镜观察了不同充氢电流下X80管道钢恒载荷拉伸试样的显微组织和断口形貌 ,测定了管道钢中氢致附加应力。结果表明 :随氢浓度增加、应力减小 ,试样断口逐渐从韧性断口向脆性断口过渡 ;断裂微裂纹通常在点蚀坑和杂质处形成并呈不连续扩展 ,形成穿晶断裂 ;管道钢中氢致附加应力随氢浓度的增加而线性升高
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| 关 键 词： | 管道钢 应力腐蚀 显微组织 氢浓度 |
| 文章编号： | 1004-9614(2004)02-0033-03 |
| 修稿时间： | 2003-11-19 |
Role of Hydrogen in Stress Corrosion Cracking of High Strength Pipeline Steel |
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| ZHANG Tao,SUN Xin ling,CHEN Ju shu,LONG Jun,LIN Mei. Role of Hydrogen in Stress Corrosion Cracking of High Strength Pipeline Steel[J]. Pipeline Technique and Equipment, 2004, 0(2): 33-35 |
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| Authors: | ZHANG Tao SUN Xin ling CHEN Ju shu LONG Jun LIN Mei |
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| Abstract: | Microstructures and fracture surfaces for the specimens of X80 pipeline steel charging with hydrogen in constant load tests were studied with the aid of optical microscope and scanning electron microscope.The results show that the ratio of cleavage fracture to ductile fracture on fracture surface increases gradually with increasing hydrogen concetration and decreasing stress.The microcracks are initiated generally at the inclusion or the pits and grew discontinuously.Finally,transgranular fracture is observed.The hydrogen induces additive stress increases linearly with the hydrogen concentration. |
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| Keywords: | Pipeline Steel Stress Corrosion Cracking Microstructure Hydrogen Concentration. |
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