Effects of Normalizing Processes on Microstructure and Impact Toughness in Ti-bearing Weld Metal of Multi layer MAG Welded HSLA Steel

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	Effects of Normalizing Processes on Microstructure and Impact Toughness in Ti-bearing Weld Metal of Multi layer MAG Welded HSLA Steel
	S. P. Lu; X. Wang; W. C. Dong; Y. Y. Li
	2013
发表期刊	Isij International
ISSN	0915-1559
卷号	53 期号:1 页码:96-101
摘要	The influences of different normalizing heat treatments on microstructure, non-metallic inclusions and impact toughness in MAG Ti-bearing weld metal of HSLA steel has been studied. It has been shown that for the Ti-bearing weld metal the impact toughness after normalizing treatment decreases significantly against prolonging holding time and increasing normalizing temperature. The Mn-depleted zone forms around the Ti-bearing phase (MnTiO3) precipitated on Mn-Si oxide. Proeutectoid ferrite preferentially nucleates at the Mn-depleted zone and the interface between austenite and proeutectoid ferrite becomes the nucleation sites for pearlite thereafter. Mn-depleted zone formation increases the pearlite nucleation sites, and makes the pearlite fine. The dissolve of Ti-bearing precipitate causes disappear of Mn-depleted zone at strong normalizing processes (longer normalizing time and higher normalizing temperature), and the number of ferrite nucleation sites decreases, then the pearlite become coarser, which causes the deterioration of impact toughness.
部门归属	[lu, shanping ; wang, xin ; dong, wenchao ; li, yiyi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; lu, sp (reprint author), chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, peoples r china. ; shplu@imr.ac.cn
关键词	Normalizing Process Weld Metal Impact Toughness Ti-bearing Precipitate Heat-affected Zone Inclusion Formation Titanium Addition Deoxidized Steel Ferrite Precipitation Oxide Solidification Carbonitrides Nucleation
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语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/71391
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	S. P. Lu,X. Wang,W. C. Dong,et al. Effects of Normalizing Processes on Microstructure and Impact Toughness in Ti-bearing Weld Metal of Multi layer MAG Welded HSLA Steel[J]. Isij International,2013,53(1):96-101.
APA	S. P. Lu,X. Wang,W. C. Dong,&Y. Y. Li.(2013).Effects of Normalizing Processes on Microstructure and Impact Toughness in Ti-bearing Weld Metal of Multi layer MAG Welded HSLA Steel.Isij International,53(1),96-101.
MLA	S. P. Lu,et al."Effects of Normalizing Processes on Microstructure and Impact Toughness in Ti-bearing Weld Metal of Multi layer MAG Welded HSLA Steel".Isij International 53.1(2013):96-101.