Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding

Trinh, Ngoc Quang; Tashiro, Shinichi; Le, Khoi Dang; Suga, Tetsuo; Kakizaki, Tomonori; Yamazaki, Kei; Lersvanichkool, Ackadech; Murphy, Anthony B.; Van Bui, Hanh; Tanaka, Manabu

doi:https://doi.org/10.1016/j.ijheatmasstransfer.2024.125803

Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding

Trinh, Ngoc Quang; Tashiro, Shinichi; Le, Khoi Dang et al.

International Journal of Heat and Mass Transfer, 2024, 231, 125803

Number of Access:785（2025-08-15 10:59 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/97655

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Title	Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding
Creator	CreatorName Trinh, Ngoc Quang
	NRID 1000070432424 1000070432424 researchmap permalink d8dshw3z d8dshw3z Scopus Author ID 15833130200 15833130200 CreatorName Tashiro, Shinichi
	CreatorName Le, Khoi Dang
	NRID 1000010863102 1000010863102 researchmap permalink TS2529 TS2529 CreatorName Suga, Tetsuo
	CreatorName Kakizaki, Tomonori
	CreatorName Yamazaki, Kei
	CreatorName Lersvanichkool, Ackadech
	CreatorName Murphy, Anthony B.
	CreatorName Van Bui, Hanh
	NRID 1000020243272 1000020243272 researchmap permalink read0014392 read0014392 Scopus Author ID 25641191700 25641191700 CreatorName Tanaka, Manabu
Subject	Current path
	Flux column
	Gas composition
	Metal transfer
	Metal-cored arc welding
Description	Trinh N.Q., Tashiro S., Le K.D., et al. Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding. International Journal of Heat and Mass Transfer 231, 125803 (2024); https://doi.org/10.1016/j.ijheatmasstransfer.2024.125803.
Abstract	Metal transfer frequencies in a gas metal arc welding process with a metal-cored wire were quantitatively measured for the first time as a function of the CO₂ content (i.e., 5, 10, 15, 20, 25, 50, and 100%) in argon-CO₂ shielding gas mixtures at welding currents of 220, 250, and 280 A, and the results were compared with those of a solid wire. As a result, the metal transfer frequency of solid wire was monotonically decreased with the CO₂ content owing to an increase in the arc pressure, which prevented droplet detachment. However, the metal transfer frequency of the metal-cored wire presented a maximum value at 15% CO₂ under all the current levels. The transfer behavior was supposed to depend on the relation between the arc attachment position and the tip of the unmelted flux position inside the cored wire. When the CO₂ concentration was low, the arc was attached higher than the unmelted flux, causing the electromagnetic force to be ineffective in droplet separation. When the CO₂ concentration increased slightly, the arc was moved downward to the tip of the unmelted flux. That tendency temporarily facilitated the neck formation at the wire tip due to enhanced electromagnetic force flowing through the molten metal on the wire tip. Nevertheless, when the CO₂ content increased over a critical value, the arc pressure became a dominant factor to hinder the droplet detachment, which caused a decrease in transfer frequency. Consequently, the metal transfer frequency of metal-cored wire became maximum at 15% CO₂.
Publisher	Elsevier Ltd
Source Title	International Journal of Heat and Mass Transfer
Volume (Issue)	231
Page	125803
Date of Issued	2024-10-01
Language	English
Handle URL	https://hdl.handle.net/11094/97655
PISSN	00179310
Relation.isIdenticalTo	DOI (Publisher Version) https://doi.org/10.1016/j.ijheatmasstransfer.2024.125803
Access Rights	open access
CopyRight	This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
oaire:version	Version of Record
Category	学術雑誌論文 Journal Article

Resource Type	journal article
Local Type	Journal Article
DCTERMS.bibliographicCitation	International Journal of Heat and Mass Transfer. 2024, 231, p. 125803
DC.title	Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding
DC.creator	Trinh, Ngoc Quang
	Tashiro, Shinichi
	Le, Khoi Dang
	Suga, Tetsuo
	Kakizaki, Tomonori
	Yamazaki, Kei
	Lersvanichkool, Ackadech
	Murphy, Anthony B.
	Van Bui, Hanh
	Tanaka, Manabu
DC.publisher	Elsevier Ltd
DC.language' scheme='DCTERMS.RFC1766	English
DCTERMS.issued' scheme='DCTERMS.W3CDTF	2024-10-01
DC.identifier	https://doi.org/10.1016/j.ijheatmasstransfer.2024.125803
DC.subject	Current path
	Flux column
	Gas composition
	Metal transfer
	Metal-cored arc welding
DC.description	Trinh N.Q., Tashiro S., Le K.D., et al. Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding. International Journal of Heat and Mass Transfer 231, 125803 (2024); https://doi.org/10.1016/j.ijheatmasstransfer.2024.125803.
DCTERMS.abstract	Metal transfer frequencies in a gas metal arc welding process with a metal-cored wire were quantitatively measured for the first time as a function of the CO₂ content (i.e., 5, 10, 15, 20, 25, 50, and 100%) in argon-CO₂ shielding gas mixtures at welding currents of 220, 250, and 280 A, and the results were compared with those of a solid wire. As a result, the metal transfer frequency of solid wire was monotonically decreased with the CO₂ content owing to an increase in the arc pressure, which prevented droplet detachment. However, the metal transfer frequency of the metal-cored wire presented a maximum value at 15% CO₂ under all the current levels. The transfer behavior was supposed to depend on the relation between the arc attachment position and the tip of the unmelted flux position inside the cored wire. When the CO₂ concentration was low, the arc was attached higher than the unmelted flux, causing the electromagnetic force to be ineffective in droplet separation. When the CO₂ concentration increased slightly, the arc was moved downward to the tip of the unmelted flux. That tendency temporarily facilitated the neck formation at the wire tip due to enhanced electromagnetic force flowing through the molten metal on the wire tip. Nevertheless, when the CO₂ content increased over a critical value, the arc pressure became a dominant factor to hinder the droplet detachment, which caused a decrease in transfer frequency. Consequently, the metal transfer frequency of metal-cored wire became maximum at 15% CO₂.
DC.rights	This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
DC.format	97655
citation_title	Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding
citation_author	Trinh, Ngoc Quang
	Tashiro, Shinichi
	Le, Khoi Dang
	Suga, Tetsuo
	Kakizaki, Tomonori
	Yamazaki, Kei
	Lersvanichkool, Ackadech
	Murphy, Anthony B.
	Van Bui, Hanh
	Tanaka, Manabu
citation_publisher	Elsevier Ltd
citation_language	English
citation_date	2024-10-01
citation_journal_title	International Journal of Heat and Mass Transfer
citation_volume	231
citation_firstpage	125803
citation_doi	https://doi.org/10.1016/j.ijheatmasstransfer.2024.125803
citation_public_url	https://hdl.handle.net/11094/97655

Eligible CO₂ content in Ar-CO₂ mixture shielding gas for improving metal transfer in metal-cored arc welding

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