Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere

doi:10.1007/s00170-016-9679-9

CORC > 力学研究所 > 中国科学院力学研究所 > 先进制造工艺力学重点实验室

	Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere
	Hu YW(胡耀武); He XL(何秀丽); Yu G(虞钢); Li SX(李少霞); Zheng CY(郑彩云); Ning WJ(宁伟健); Hu, YW; He, XL; Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China.
刊名	INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
	2017-06-01
卷号	90 期号:9-12 页码:3555-3565
关键词	Laser Welding Keyhole Welding Shielding Gas Fluid Flow
ISSN号	0268-3768
DOI	10.1007/s00170-016-9679-9
文献子类	Article
英文摘要	Laser keyhole welding of 42CrMo in air and argon atmospheres has been studied both experimentally and numerically. Significant macroscale difference is observed for welding carried out under argon and air shielding. Fusion zone of welding under argon shielding has a "a-1/2" shape while it has a "U" shape for welding in air. The surface of the weldment is smoother for welding in argon when compared with that in air. Oxygen effect is proposed to account for the experimental results. A three-dimensional heat transfer model with a predefined keyhole is developed to study the heat transport and fluid flow in laser welding process. The variation of weld pool geometry and temperature history is investigated for different oxygen concentrations. It is found that a small amount of oxygen could significantly modify the weld pool dimension while keeping the temperature history of materials and thus the microstructure in the fusion zone and heat-affected zone unchanged.
分类号	二类
WOS关键词	AUSTENITIC STAINLESS-STEEL ; MARANGONI CONVECTION ; HEAT-TRANSFER ; FLUID-FLOW ; PENETRATION ; METAL ; OXIDE ; MICROSTRUCTURE ; SIMULATION ; OXYGEN
WOS研究方向	Automation & Control Systems ; Engineering
语种	英语
WOS记录号	WOS:000401505000096
资助机构	National Natural Science Foundation of China(11272317 ; 11272316)
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/60553]
专题	力学研究所_先进制造工艺力学重点实验室
通讯作者	Hu, YW; He, XL; Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Hu YW,He XL,Yu G,et al. Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere[J]. INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,2017,90(9-12):3555-3565.
APA	胡耀武.,何秀丽.,虞钢.,李少霞.,郑彩云.,...&Yu, G .(2017).Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere.INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY,90(9-12),3555-3565.
MLA	胡耀武,et al."Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere".INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 90.9-12(2017):3555-3565.