Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding

In this paper, the morphological characteristics of arc plasma and droplet transfer during the alternating magnetic field-assisted narrow gap groove laser-MIG (metal inert gas) hybrid welding process were investigated. The characteristics of arc plasma and droplet transfer, electron temperature, and...

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Autores principales:	Baihao Cai, Juan Fu, Yong Zhao, Fugang Chen, Yonghui Qin, Shuming Song
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	alternating magnetic field laser-MIG hybrid welding arc plasma spectrum droplet transfer Mining engineering. Metallurgy TN1-997
Acceso en línea:	https://doaj.org/article/9e20cd54950a4b78aed13909bd2797f4
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id	oai:doaj.org-article:9e20cd54950a4b78aed13909bd2797f4
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spelling	oai:doaj.org-article:9e20cd54950a4b78aed13909bd2797f42021-11-25T18:21:25ZEffect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding10.3390/met111117122075-4701https://doaj.org/article/9e20cd54950a4b78aed13909bd2797f42021-10-01T00:00:00Zhttps://www.mdpi.com/2075-4701/11/11/1712https://doaj.org/toc/2075-4701In this paper, the morphological characteristics of arc plasma and droplet transfer during the alternating magnetic field-assisted narrow gap groove laser-MIG (metal inert gas) hybrid welding process were investigated. The characteristics of arc plasma and droplet transfer, electron temperature, and density were analyzed using a high-speed camera and spectrum diagnosis. Our results revealed that the arc maintained a relatively stable state and rotated at a high speed to enhance the arc stiffness, and further improved the stability of the arc under the alternating magnetic field. The optimum magnetic field parameters in this experiment were B = 16 mT and f = 20 Hz, the electron temperature was 9893.6 K and the electron density was 0.99 × 10<sup>17</sup> cm<sup>−3</sup> near the bottom of the groove, which improved the temperature distribution inside the narrow gap groove and eliminated the lack of sidewall fusion defect. Compared to those without a magnetic field, the magnetic field could promote droplet transfer, the droplet diameter decreased by 17.6%, and the transition frequency increased by 23.5% (owing to the centrifugal force during droplet spinning and electromagnetic contraction force). The width of the weld bead was increased by 12.4% and the pores were also significantly reduced due to the stirring of the magnetic field on the molten pool.Baihao CaiJuan FuYong ZhaoFugang ChenYonghui QinShuming SongMDPI AGarticlealternating magnetic fieldlaser-MIG hybrid weldingarc plasmaspectrumdroplet transferMining engineering. MetallurgyTN1-997ENMetals, Vol 11, Iss 1712, p 1712 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	alternating magnetic field laser-MIG hybrid welding arc plasma spectrum droplet transfer Mining engineering. Metallurgy TN1-997
spellingShingle	alternating magnetic field laser-MIG hybrid welding arc plasma spectrum droplet transfer Mining engineering. Metallurgy TN1-997 Baihao Cai Juan Fu Yong Zhao Fugang Chen Yonghui Qin Shuming Song Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding
description	In this paper, the morphological characteristics of arc plasma and droplet transfer during the alternating magnetic field-assisted narrow gap groove laser-MIG (metal inert gas) hybrid welding process were investigated. The characteristics of arc plasma and droplet transfer, electron temperature, and density were analyzed using a high-speed camera and spectrum diagnosis. Our results revealed that the arc maintained a relatively stable state and rotated at a high speed to enhance the arc stiffness, and further improved the stability of the arc under the alternating magnetic field. The optimum magnetic field parameters in this experiment were B = 16 mT and f = 20 Hz, the electron temperature was 9893.6 K and the electron density was 0.99 × 10<sup>17</sup> cm<sup>−3</sup> near the bottom of the groove, which improved the temperature distribution inside the narrow gap groove and eliminated the lack of sidewall fusion defect. Compared to those without a magnetic field, the magnetic field could promote droplet transfer, the droplet diameter decreased by 17.6%, and the transition frequency increased by 23.5% (owing to the centrifugal force during droplet spinning and electromagnetic contraction force). The width of the weld bead was increased by 12.4% and the pores were also significantly reduced due to the stirring of the magnetic field on the molten pool.
format	article
author	Baihao Cai Juan Fu Yong Zhao Fugang Chen Yonghui Qin Shuming Song
author_facet	Baihao Cai Juan Fu Yong Zhao Fugang Chen Yonghui Qin Shuming Song
author_sort	Baihao Cai
title	Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding
title_short	Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding
title_full	Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding
title_fullStr	Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding
title_full_unstemmed	Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding
title_sort	effect of alternating magnetic field on arc plasma characteristics and droplet transfer during narrow gap laser-mig hybrid welding
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/9e20cd54950a4b78aed13909bd2797f4
work_keys_str_mv	AT baihaocai effectofalternatingmagneticfieldonarcplasmacharacteristicsanddroplettransferduringnarrowgaplasermighybridwelding AT juanfu effectofalternatingmagneticfieldonarcplasmacharacteristicsanddroplettransferduringnarrowgaplasermighybridwelding AT yongzhao effectofalternatingmagneticfieldonarcplasmacharacteristicsanddroplettransferduringnarrowgaplasermighybridwelding AT fugangchen effectofalternatingmagneticfieldonarcplasmacharacteristicsanddroplettransferduringnarrowgaplasermighybridwelding AT yonghuiqin effectofalternatingmagneticfieldonarcplasmacharacteristicsanddroplettransferduringnarrowgaplasermighybridwelding AT shumingsong effectofalternatingmagneticfieldonarcplasmacharacteristicsanddroplettransferduringnarrowgaplasermighybridwelding
_version_	1718411275631853568

Effect of Alternating Magnetic Field on Arc Plasma Characteristics and Droplet Transfer during Narrow Gap Laser-MIG Hybrid Welding

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