新型含Cu管线钢的抗氢致开裂性能-金属学报.PDF

第54 卷 第10 期 Vol.54 No. 10 2018 年10 月 ACTA METALLURGICA SINICA Oct. 2018 新型含Cu 管线钢的抗氢致开裂性能 史显波 严 伟 王 威 单以银 杨 柯 ( 中国科学院金属研究所 沈阳 110016) 摘要 对比研究了传统X80 管线钢和新型含Cu 管线钢的氢致开裂敏感性。结果表明，传统X80 管线钢抗氢致 开裂性能不佳，氢致裂纹主要沿着马氏体/奥氏体(M/A) 岛与基体界面扩展；而不同Cu 含量的新型管线钢具有 优异的抗氢致开裂性能，表现为氢致开裂实验后无裂纹出现。分析认为，含Cu 管线钢中的纳米尺寸富Cu 相提 供了捕获H 的有利陷阱，这种均匀弥散析出的细小富Cu 相为H 的分布提供了众多位置，有助于避免在局部区 域产生很高的H 富集而发生微观区域氢脆。纳米尺寸富Cu 相作为有利氢陷阱为研发高强度兼具优异抗氢致 开裂性能的新型管线钢提供了新思路。 关键词 管线钢，Cu，氢致开裂，富Cu 相，氢陷阱 中图分类号 TG 142.1 文章编号 0412-1961(2018) 10-1343-07 Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels SHI Xianbo, YAN Wei, WANG Wei, SHAN Yiyin, YANG Ke Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China Correspondent: YANG Ke, professor, Tel: (024 E-mail: kyang@imr.ac.cn Supported by Shenyang Science and Technology Research Funding (No.18-013-0-53) Manuscript received 2017-12-06, in revised form 2018-05-10 ABSTRACT Hydrogen-induced cracking (HIC) resistance of pipeline steels is one of the most impor- tant properties for sour gas service pipelines. For the conventional pipeline steels, the strength level main- ly depends on the Mn content. However, as the Mn content increases, the unfavorable microstructures such as large size martensite/austenite (M/A) islands, bainite or martensite will be generated, which will deteriorate the HIC resistance of the steels. Therefore, it is hard to simultaneously improve strength level a