Microstructure and microhardness analysis of laser welded dissimilar steel

doi:10.12073/j.hjxb.20191227002

	Microstructure and microhardness analysis of laser welded dissimilar steel
	Yin, Yan 2; Kang, Ping 2; Lu, Chao 3; Zhang, Yuan 2; Zhang, Ruihua 1,3
刊名	Hanjie Xuebao/Transactions of the China Welding Institution
	2020-07-25
卷号	41 期号:7 页码:71-77
关键词	Carbides Crystals Grain boundaries Heat affected zone Microhardness Phase composition Textures Welding Cellular dendrites Columnar crystals Equilibrium phase diagrams Martensitic structures Micro segregation Microhardness analysis Microhardness distribution Migration phenomena
ISSN号	0253360X
DOI	10.12073/j.hjxb.20191227002
英文摘要	After welding dissimilar steel by laser swing welding, the equilibrium phase diagrams of base 3Cr13 and VG10 were calculated by JMATPro software, and the phase composition and microstructure of weld, fusion zone and heat affected zone were analyzed by XRD, SEM, EPMA and other techniques. in addition, the microhardness distribution of welded joints was determined. The results show that the weld is mainly composed of phases and carbides M7C3, and from the fusion line to the weld center, the structure changes from plane crystal to cellular crystal, cellular dendrite, columnar crystal, dendritic crystal and equiaxed crystal. The microstructure of the weld exists micro-segregation, in which C and Cr elements are enriched at the grain boundary, Fe elements are enriched within the grains, and bar-like M7C3 precipitates at the grain boundaries. There is a C migration phenomenon at the base material of the fusion line near. Among them, acicular martensitic structure is generated on the 3Cr13 side, and the unmixed zone exists in the fusion zone on the VG10 side. At this position, the massive, island tissue is embedded in the base Material, and there are lamellar carbides on the structure. The hardness of the base metal on both sides of the fusion line is the largest, and the hardness of the weld zone changes little. The hardness of the heat affected zone decreases with the increase of the distance away from the weld center. Copyright © 2020 Transactions of the China Welding Institution. All rights reserved.
语种	中文
出版者	Harbin Research Institute of Welding
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/115706]
专题	材料科学与工程学院
作者单位	1.Yangjiang Hardware Knife Cut Industrial Technology Research Institute, Yangjiang; 529533, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Central Iron and Steel Research Institute, Beijing; 100081, China;
推荐引用方式 GB/T 7714	Yin, Yan,Kang, Ping,Lu, Chao,et al. Microstructure and microhardness analysis of laser welded dissimilar steel[J]. Hanjie Xuebao/Transactions of the China Welding Institution,2020,41(7):71-77.
APA	Yin, Yan,Kang, Ping,Lu, Chao,Zhang, Yuan,&Zhang, Ruihua.(2020).Microstructure and microhardness analysis of laser welded dissimilar steel.Hanjie Xuebao/Transactions of the China Welding Institution,41(7),71-77.
MLA	Yin, Yan,et al."Microstructure and microhardness analysis of laser welded dissimilar steel".Hanjie Xuebao/Transactions of the China Welding Institution 41.7(2020):71-77.