Microstructural evolution and mechanical properties of heat affected zones for 9Cr2WVTa steels with different carbon contents

IMR OpenIR

	Microstructural evolution and mechanical properties of heat affected zones for 9Cr2WVTa steels with different carbon contents
	J. Wang; S. P. Lu; W. C. Dong; D. Z. Li; L. J. Rong
	2014
发表期刊	Materials & Design
ISSN	0261-3069
卷号	64 页码:550-558
摘要	The microstructures and mechanical properties of heat affected zones (HAZs) by Gas Tungsten Arc Welding (GTAW) were studied for 9Cr2WVTa steels with carbon content varying from 0.07 wt.% to 0.25 wt.%. Enlarged HAZs samples with 8 mm to 10 mm wide uniform temperature zone were prepared by the thermal-mechanical physical simulator Gleeble 1500 based on the Finite Element Method (FEM) numerical simulation and experimental measurement for the welding thermal cycle process and weld profile. The microstructures were observed by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). In addition, the mechanical properties tests including micro-hardness test, tensile test and impact test were carried out to investigate the effects of the carbon content and the welding thermal cycle. The results show that the big blocky delta ferrite in 9Cr2WVTa steel with lower carbon content deteriorates the impact property. On the other hand, the quenched martensite, especially for the twin martensite in 9Cr2WVTa steel with higher carbon content, deteriorates the impact toughness as well. The weldability of 9Cr2WVTa steel can be improved by adjusting the carbon content between 0.14 wt.% and 0.17 wt.%. (C) 2014 Elsevier Ltd. All rights reserved.
部门归属	[wang, jian ; lu, shanping ; dong, wenchao ; li, dianzhong ; rong, lijian] 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	Reduced Activation Ferrite Martensite Steel Heat Affected Zones Microstructural Evolution Mechanical Property Martensitic Steel Ferritic/martensitic Steels Corrosion Behavior Resistant Steel Welded-joint Toughness Temperature Tensile Strain
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/73409
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Wang,S. P. Lu,W. C. Dong,et al. Microstructural evolution and mechanical properties of heat affected zones for 9Cr2WVTa steels with different carbon contents[J]. Materials & Design,2014,64:550-558.
APA	J. Wang,S. P. Lu,W. C. Dong,D. Z. Li,&L. J. Rong.(2014).Microstructural evolution and mechanical properties of heat affected zones for 9Cr2WVTa steels with different carbon contents.Materials & Design,64,550-558.
MLA	J. Wang,et al."Microstructural evolution and mechanical properties of heat affected zones for 9Cr2WVTa steels with different carbon contents".Materials & Design 64(2014):550-558.