アークへの鉄蒸気混入による電流密度が及ぼす入熱量への寄与

カテゴリ: 部門大会

論文No: 26

グループ名: 【B】平成25年電気学会電力・エネルギー部門大会

発行日: 2013/08/27

タイトル(英語): Contribution to Heat Transfer to Anode Affected by Current Density Contaminated with Iron Vapor with Arc

著者名: 小島 正和(東京都市大学),後藤 康徳(東京都市大学),岩尾 徹(東京都市大学),田代 真一(大阪大学),田中 学(大阪大学),湯本 雅恵(東京都市大学)

著者名(英語): Masakazu Kojima(Tokyo City University),Yasunori Goto(Tokyo City University),Toru Iwao(Tokyo City University),Shinichi Tashiro(Osaka University),Manabu Tanaka(Osaka University),Motoshige Yumoto(Tokyo City University)

キーワード: アーク溶接|金属蒸気|入熱量|熱流束|電流密度電磁熱流体シミュレーション|arc welding|metal vapor|heat transfer|heat flux|current densityelectromgnetic thermal fluid simulation

要約(日本語): Recently, the arc welding is one of the main welding technology and used in the various fields of industrial products. In welding, the high reliability about products and structures is needed. However, the welding defect sometimes occurred. Therefore, in order to prevent the accident caused by welding defect, experimental and calculation research have been researched in the case of steady arc affected by metal vapor in TIG (Tungsten Inert Gas) welding. Heat transfer to anode affected by current density including iron vapor with arc was elucidated. The iron vapor is assumed because of simplified calculation. By using the imaginary vapor, the current density distribution including iron vapor is affected by the electrical conductivity. In the case of imaginary vapor (only electrical conductivity changes) the decrement of current density at Ar-Fe and Ar is to be 20 and 170%, respectively, where the heat flux focus on the electrical conductivity, the current density decreases because the electric field contributes. Moreover, the current and electrode angle were changed and the contribution to heat transfer to anode affected by iron vapor mixing was verified. As a result, the contribution to heat transfer decrement affected by the including the iron vapor became large. Thus, the current density becomes high. Especially, the heat transfer of 20 A decreased in the case of over 130 A. In the case of an electrode angle variation, because of the mean current density, the heat transfer to anode increased and it became remarkable include the iron vapor, especially.

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