Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels

doi:10.11900/0412.1961.2017.00522

CORC > 金属研究所 > 中国科学院金属研究所

	Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels
	Shi Xianbo; Yan Wei; Wang Wei; Shan Yiyin; Yang Ke
刊名	ACTA METALLURGICA SINICA
	2018-10-11
卷号	54 期号:10 页码:1343-1349
关键词	pipeline steel Cu hydrogen-induced cracking Cu-rich phase hydrogen trap
ISSN号	0412-1961
DOI	10.11900/0412.1961.2017.00522
通讯作者	Yang Ke(kyang@imr.ac.cn)
英文摘要	Hydrogen-induced cracking (HIC) resistance of pipeline steels is one of the most important properties for sour gas service pipelines. For the conventional pipeline steels, the strength level mainly 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 and HIC resistance for pipeline steel. The nature of HIC in pipeline steel is hydrogen embrittlement, which is essentially the redistribution of H atoms into the matrix of steel. So, how to make the distribution of H atoms in the steel as evenly as possible without causing local enrichment is a key factor to improve the HIC of pipeline steels. In this work, the susceptibilities of HIC of traditional X80 and novel Cu-bearing pipeline steels were studied with comparison. The results showed that the X80 pipeline steel behaved bad HIC resistance. The hydrogen-induced cracks mainly expanded along the interface between M/A islands and the matrix. However, the novel Cu-bearing pipeline steels with different Cu contents exhibited excellent HIC resistance, showing no cracks were produced after HIC test. It was analyzed that nanosized Cu-rich precipitates in the Cu-bearing pipeline steels are speculated to act as the beneficial hydrogen traps, and these uniformly dispersed fine Cu-rich phases in matrix provide many sites for the distribution of H atoms, which helps to avoid the localized high concentration H atoms enrichment leading to hydrogen embrittlement. Taking nano-sized Cu-rich phases as a type of beneficial hydrogen traps provides a new way for the development of new pipeline steels with high strength and excellent HIC resistance.
资助项目	Shenyang Science and Technology Research Funding[18-013-0-53]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000446009000001
资助机构	Shenyang Science and Technology Research Funding
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/129627]
专题	金属研究所_中国科学院金属研究所
通讯作者	Yang Ke
作者单位	Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Shi Xianbo,Yan Wei,Wang Wei,et al. Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels[J]. ACTA METALLURGICA SINICA,2018,54(10):1343-1349.
APA	Shi Xianbo,Yan Wei,Wang Wei,Shan Yiyin,&Yang Ke.(2018).Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels.ACTA METALLURGICA SINICA,54(10),1343-1349.
MLA	Shi Xianbo,et al."Hydrogen-Induced Cracking Resistance of Novel Cu-Bearing Pipeline Steels".ACTA METALLURGICA SINICA 54.10(2018):1343-1349.