Plasma arc welding with filler wire and microstructure of pure nickel N6

doi:10.13373/j.cnki.cjrm.2015.02.002

	Plasma arc welding with filler wire and microstructure of pure nickel N6
	Wang, Xijing; Chai, Tingxi; Liu, Xiao; Xiao, Jun
刊名	Xiyou Jinshu/Chinese Journal of Rare Metals
	2015-02-01
卷号	39 期号:2 页码:103-110
关键词	Austenite Electric arc welding Fillers Fracture Hardness Mechanical properties Microstructure Nickel Plasma welding Scanning electron microscopy Tensile strength Textures Wire Energy dispersive spectrometry Filler wire Fine equiaxed grains Heat-affected areas Microstructure and mechanical properties Optical microscopes Pure nickels Single phase austenite
ISSN号	02587076
DOI	10.13373/j.cnki.cjrm.2015.02.002
英文摘要	The industrial pure nickel N6 was experimentally studied by plasma arc welding with filler wire process. The microstructure and mechanical properties of the welded joint were analyzed by optical microscope (OM), scanning electron microscope (SEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD) and microhardness test. The results showed that the joint formed well and the tensile strength of joints with filler wire was 333 MPa, which could achieve 97.6% of the base metal strength with appropriate plasma parameters, and the tensile strength of joints without filler wire was 240 MPa, which could achieve 70.5% of the base metal strength. The microstructure of base metal was fine equiaxed grains, while the weld zone of the joints welded with filler wire had gross dendrites structure. In the heat-affected area, the grains near the welding pool grew up because of overheating, while the grains near the base metal kept fine equiaxed grains. The matrix structure of welded joint with filler wire was austenite (γ-Ni) with some strengthening dispersion phases γ'(Ni3(Al,Ti)C). The tensile fracture of welded joint with filler wire was a mixed ductile-brittle fracture and the heat-affected area had the minimum hardness. The microstructure in weld zone and heat-affected area of welding joints without filler wire was coarser than that in base metal, and the matrix structure was single phase austenite. The tensile fracture of welded joint without filler wire was fragile fracture and the heat-affected area had the minimum hardness. ©, 2015, Editorial Office of Chinese Journal of Rare Metals. All right reserved.
语种	中文
出版者	Editorial Office of Chinese Journal of Rare Metals
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/112350]
专题	材料科学与工程学院马克思主义学院
作者单位	School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Wang, Xijing,Chai, Tingxi,Liu, Xiao,et al. Plasma arc welding with filler wire and microstructure of pure nickel N6[J]. Xiyou Jinshu/Chinese Journal of Rare Metals,2015,39(2):103-110.
APA	Wang, Xijing,Chai, Tingxi,Liu, Xiao,&Xiao, Jun.(2015).Plasma arc welding with filler wire and microstructure of pure nickel N6.Xiyou Jinshu/Chinese Journal of Rare Metals,39(2),103-110.
MLA	Wang, Xijing,et al."Plasma arc welding with filler wire and microstructure of pure nickel N6".Xiyou Jinshu/Chinese Journal of Rare Metals 39.2(2015):103-110.