Relationship between microstructure and hydrogen induced cracking behavior in a low alloy pipeline steel

查看全文 作　　者：Jing [1]Li;Xiuhua [1]Gao;Linxiu [1]Du;Zhenguang [1]Liu

机构地区：[1]State Key Laboratory of Rolling and Automation,Northeastern University,5henyang 110819,China

出　　处：《Journal of Materials Science & Technology》索引2017年第33卷第12期,共9页

基　　金：supported by the National High Technology Research and Development Program of China(Grant No.2015AA03A501);the National Natural Science Foundation of China(Grant No.51274063) 摘　　要：Hydrogen induced cracking(HIC) behaviors of a high strength pipeline steel with three different microstructures, granular bainite & lath bainite(GB + LB), granular bainite & acicular ferrite(GB + AF), and quasi-polygonal ferrite(QF), were studied by using corrosion experiment based on standard NACE TM0284. The HIC experiment was conducted in hydrogen sulfide(H_2S)-saturated solution. The experimental results show that the steel with GB + AF and QF microstructure present excellent corrosion resistance to HIC, whereas the phases of bainite lath and martensite/austenite in LB + GB microstructure are responsible for poor corrosion resistance. Compared with ferrite phase, the bainite microstructure exhibits higher strength and crack susceptibility of HIC. The AF + GB microstructure is believed to have the best combination of mechanical properties and resistance to HIC among the designed steels. 关键词：微观结构管道钢行为低合金腐蚀实验氢 HIC 铁酸盐

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Relationship between microstructure and hydrogen induced cracking behavior in a low alloy pipeline steel

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