Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser

doi:10.1016/j.apsusc.2007.03.009

IMECH-IR > 力学所知识产出(1956-2008)

	Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser
	Liu XB(刘秀波); Yu G(虞钢); Pang M(庞铭); Fan JW; Wang HH(王恒海); Zheng CY(郑彩云); Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
发表期刊	Applied Surface Science
	2007
卷号	253 期号:17 页码:7281-7289
ISSN	0169-4332
摘要	Experiments of autogenous laser full penetration welding between dissimilar cast Ni-based superalloy K418 and alloy steel 42CrMo flat plates with 3.5 mm thickness were conducted using a 3 kW continuous wave (CW) Nd:YAG laser. The influences of laser welding velocity, flow rate of side-blow shielding gas, defocusing distance were investigated. Microstructure of the welded seam was characterized by optical microscopy (OM), scanning electron microscopy (SEM) and X-ray diffraction (XRD) and energy dispersive spectrometer (EDS). Mechanical properties of the welded seam were evaluated by microhardness and tensile strength testing. Results show that high quality full penetration laser-welded joint can be obtained by optimizing the welding velocity, flow rate of shielding gas and defocusing distance. The laser-welded seam have non-equilibrium solidified microstructures consisting of gamma-FeCr0.29Ni0.16C0.06 austenite solid solution dendrites as the dominant and very small amount of super-fine dispersed Ni3Al gamma' phase and Laves particles as well as MC needle-like carbides distributed in the interdendritic regions. Although the microhardness of the laser-welded seam was lower than that of the base metal, the strength of the joint was equal to that of the base metal and the fracture mechanism showed fine ductility. (c) 2007 Elsevier B.V. All rights reserved.
关键词	Laser Processing Metals And Alloys Full Penetration Welding Microstructure Mechanical Properties Tensile Properties Aluminum-alloys Joints
DOI	10.1016/j.apsusc.2007.03.009
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000247867700050
关键词[WOS]	TENSILE PROPERTIES ; ALUMINUM-ALLOYS ; JOINTS
WOS研究方向	Chemistry ; Materials Science ; Physics
WOS类目	Chemistry, Physical ; Materials Science, Coatings & Films ; Physics, Applied ; Physics, Condensed Matter
引用统计	被引频次：21[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/33945
专题	力学所知识产出(1956-2008)
通讯作者	Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Lab Laser Intelligent Mfg, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Liu XB,Yu G,Pang M,et al. Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser[J]. Applied Surface Science,2007,253,17,:7281-7289.
APA	刘秀波.,虞钢.,庞铭.,Fan JW.,王恒海.,...&Yu, G .(2007).Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser.Applied Surface Science,253(17),7281-7289.
MLA	刘秀波,et al."Dissimilar autogenous full penetration welding of superalloy K418 and 42CrMo steel by a high power CWNd : YAG laser".Applied Surface Science 253.17(2007):7281-7289.

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