Characteristics of a Co₂ Shielded Gas Tungsten Arc

Tanaka, Manabu; Tashiro, Shinichi; Kashima, Takayuki; Murphy, Anthony, B.; Lowke, John, J.

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タイトル	Characteristics of a Co₂ Shielded Gas Tungsten Arc
著者	Tanaka, Manabu Tanaka, Manabu
	Tashiro, Shinichi Tashiro, Shinichi
	Kashima, Takayuki Kashima, Takayuki
	Murphy, Anthony, B. Murphy, Anthony, B.
	Lowke, John, J. Lowke, John, J.
キーワード等	CO₂ gas
	Thermal plasma
	Arc
	Heat source
	Materials processing
	Low cost
	High productivity
抄録	In order to develop a novel heat source for materials processing with low costs and high productivity in comparison with the TIG arc, the characteristics of a CO₂ gas shielded plasma arc are studied. A double gas shielded system which consists of CO₂ gas and inert gas is employed for the plasma arc torch, so avoiding the consumption of tungsten electrode, and then achieves equivalent arc stability to a TIG arc for 1800 seconds operation. The arc voltage of the CO₂ gas shielded plasma arc in the conditions of arc current 150 A and arc gap 3 mm is about 19 V, which is much higher than the 12 V of a TIG arc. The CO₂ gas clearly constricts the arc and the maximum heat intensity at the anode surface in the CO₂ gas shielded plasma arc becomes about 10 times larger than that of the TIG arc. The penetration depth of stainless steel melted by the CO₂ gas shielded plasma arc is much larger than that for the argon TIG arc. It is concluded that the greater heating power of the CO₂ gas shielded plasma arc due to the arc constriction remarkably contributes to the high productivity of materials processing.
公開者	大阪大学接合科学研究所
公開者の別表記	Joining and Welding Research Institute, Osaka University
公開者 (ヨミ)	オオサカダイガクセツゴウカガクケンキュウジョ
掲載誌名	Transactions of JWRI
巻	35
号	1
開始ページ	9
終了ページ	12
刊行年月	2006-07
ISSN	03874508
NCID	AA00867058
URL	http://hdl.handle.net/11094/6515
言語	英語
カテゴリ	紀要論文 Departmental Bulletin Paper
カテゴリ	Transactions of JWRI / Vol.35 No.1 (2006-07)

著者版フラグ	publisher
NII資源タイプ	紀要論文
ローカル資源タイプ	紀要論文
dcmi資源タイプ	text
DCTERMS.bibliographicCitation	Transactions of JWRI.35(1) P.9-P.12
DC.title	Characteristics of a Co₂ Shielded Gas Tungsten Arc
DC.creator	Tanaka, Manabu
	Tashiro, Shinichi
	Kashima, Takayuki
	Murphy, Anthony, B.
	Lowke, John, J.
DC.publisher	大阪大学接合科学研究所
DC.language" scheme="DCTERMS.RFC1766	英語
DCTERMS.issued" scheme="DCTERMS.W3CDTF	2006-07
DC.identifier" scheme="DCTERMS.URI	http://hdl.handle.net/11094/6515
DC.subject	CO₂ gas
	Thermal plasma
	Arc
	Heat source
	Materials processing
	Low cost
	High productivity
DCTERMS.abstract	In order to develop a novel heat source for materials processing with low costs and high productivity in comparison with the TIG arc, the characteristics of a CO₂ gas shielded plasma arc are studied. A double gas shielded system which consists of CO₂ gas and inert gas is employed for the plasma arc torch, so avoiding the consumption of tungsten electrode, and then achieves equivalent arc stability to a TIG arc for 1800 seconds operation. The arc voltage of the CO₂ gas shielded plasma arc in the conditions of arc current 150 A and arc gap 3 mm is about 19 V, which is much higher than the 12 V of a TIG arc. The CO₂ gas clearly constricts the arc and the maximum heat intensity at the anode surface in the CO₂ gas shielded plasma arc becomes about 10 times larger than that of the TIG arc. The penetration depth of stainless steel melted by the CO₂ gas shielded plasma arc is much larger than that for the argon TIG arc. It is concluded that the greater heating power of the CO₂ gas shielded plasma arc due to the arc constriction remarkably contributes to the high productivity of materials processing.
citation_title	Characteristics of a Co₂ Shielded Gas Tungsten Arc
citation_author	Tanaka, Manabu
	Tashiro, Shinichi
	Kashima, Takayuki
	Murphy, Anthony, B.
	Lowke, John, J.
citation_publisher	大阪大学接合科学研究所
citation_language	英語
citation_date	2006-07
citation_journal_title	Transactions of JWRI
citation_volume	35
citation_issue	1
citation_firstpage	9
citation_lastpage	12
citation_issn	03874508
citation_public_url	http://hdl.handle.net/11094/6515
citation_keywords	CO₂ gas
	Thermal plasma
	Arc
	Heat source
	Materials processing
	Low cost
	High productivity

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