Effects of carbon on the CG HAZ toughness and transformation of X80 pipeline steel

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	Effects of carbon on the CG HAZ toughness and transformation of X80 pipeline steel
	X. H. Xue; L. H. Wu; B. N. Qian; J. L. Li; S. N. Lou
	2003
发表期刊	Journal of Materials Science & Technology
ISSN	1005-0302
卷号	19 期号:6 页码:580-582
摘要	X80 pipeline steel produced by TMCP has high strength and high toughness with ultrafine grain microstructure. The microstructure coarsens and the toughness worsens at the coarse grained (CG) HAZ apparently after weld simulation. The experimental results indicated that the bainitic ferrite and the second phases formed at cooling are differently as the variation of carbon in base metal. In low carbon steels, the bainitic ferrite laths are long and narrow, the second phases are complex including residual austenite, martensite, the M-A constituent and the Fe3C carbide. The formation of Fe3C carbide is the main reason of the poor toughness in CG HAZ. The ultralow carbon in base metal, however, can improve the CG HAZ toughness through restraining the formation of carbides, decreasing the M-A constituent, increasing the residual austenite content, which are beneficial to the CG HAZ toughness.
部门归属	shanghai jiao tong univ, sch mat sci & engn, shanghai 200030, peoples r china. chinese acad sci, inst met res, shenyang 110016, peoples r china.;xue, xh (reprint author), shanghai jiao tong univ, sch mat sci & engn, shanghai 200030, peoples r china;xhxue@imr.ac.cn
关键词	X80 Pipeline Steel Weld Simulation Cg Haz Ultralow Carbon Fe3c Carbide
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WOS记录号	WOS:000188365400018
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/36099
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. H. Xue,L. H. Wu,B. N. Qian,et al. Effects of carbon on the CG HAZ toughness and transformation of X80 pipeline steel[J]. Journal of Materials Science & Technology,2003,19(6):580-582.
APA	X. H. Xue,L. H. Wu,B. N. Qian,J. L. Li,&S. N. Lou.(2003).Effects of carbon on the CG HAZ toughness and transformation of X80 pipeline steel.Journal of Materials Science & Technology,19(6),580-582.
MLA	X. H. Xue,et al."Effects of carbon on the CG HAZ toughness and transformation of X80 pipeline steel".Journal of Materials Science & Technology 19.6(2003):580-582.