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Title:
Experimental and numerical study on laser keyhole welding of 42CrMo under air and argon atmosphere
Author: 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)
Source: INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
Issued Date: 2017-06-01
Volume: 90, Issue:9-12, Pages:3555-3565
Abstract: 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.
Keyword: Laser welding ; Keyhole welding ; Shielding gas ; Fluid flow
Language: 英语
Indexed Type: SCI ; EI
DOI: 10.1007/s00170-016-9679-9
DOC Type: Article
WOS Subject: Automation & Control Systems ; Engineering, Manufacturing
WOS Subject Extended: Automation & Control Systems ; Engineering
WOS Keyword Plus: AUSTENITIC STAINLESS-STEEL ; MARANGONI CONVECTION ; HEAT-TRANSFER ; FLUID-FLOW ; PENETRATION ; METAL ; OXIDE ; MICROSTRUCTURE ; SIMULATION ; OXYGEN
WOS ID: WOS:000401505000096
ISSN: 0268-3768
Funder: National Natural Science Foundation of China(11272317 ; 11272316)
Department: MAM激光智能制造工艺力学
First Institution (Yes or Not): true
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/60553
Appears in Collections:先进制造工艺力学重点实验室_期刊论文

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Recommended Citation:
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,2017-06-01,90(9-12):3555-3565.
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