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- Tashiro Shinichi
- Osaka University
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- Tanaka Manabu
- Osaka University
抄録
The heat source properties of TIG arc strongly depend on composition of shielding gas. For example, since the arc column is constricted due to high specific heat, heat flux onto a base metal in case of CO2 TIG arc is higher than that of argon TIG arc. The heat source properties can be controlled also by current waveform. Pulsed TIG welding is suitable for back-bead welding and thin plate welding, because the heat flux onto the base metal can be controlled by adjusting peak / base current ratio and frequency. In this paper, numerical simulation result of the heat source properties of pulsed TIG arc for various shielding gas composition will be reported. As a result, it was found that the heat flux increased immediately after transition from base current to peak current because of the thermal pinch effect. Furthermore, in CO2, although the heat transport toward the anode by convective flow was seen, that in radial direction due to thermal conduction was smaller than that of argon because of influence of large specific heat.
収録刊行物
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- Transactions of the Materials Research Society of Japan
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Transactions of the Materials Research Society of Japan 37 (2), 161-164, 2012
一般社団法人 日本MRS
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詳細情報 詳細情報について
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- CRID
- 1390282680489137664
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- NII論文ID
- 130003399073
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- COI
- 1:CAS:528:DC%2BC38Xht1aksL7F
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- ISSN
- 21881650
- 13823469
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可