ガスタングステンアーク溶接における電流増加が及ぼす放射損失

カテゴリ: 部門大会

論文No: 43

グループ名: 【B】平成24年電気学会電力・エネルギー部門大会

発行日: 2012/09/12

タイトル(英語): Radiation Loss of Gas Tungsten Arc Welding Affected by Current Increment

著者名: 廣瀬 迪郎(東京都市大学),岩尾 徹(東京都市大学),湯本 雅恵(東京都市大学)

著者名(英語): Michio Hirose(Tokyo City University),Toru Iwao(Tokyo City University),Motoshige Yumoto(Tokyo City University)

キーワード: GTA 溶接|アーク電流|金属蒸気|蒸気混入率|放射損失|GTA welding|arc current|metal vapor|vapor contamination ratio|radiation loss

要約(日本語): Gas tungsten arc welding is a high quality and productive joining technology. Because the inert gas is used as a　shielding gas, the arc is not contaminated by surrounding gas. Therefore, this joining process is very clean to join the　materials. However, the weld defects are occurred, such as lack of penetration and overlap because of low heat transfer to the anode. However, the view point of radiation loss has not been researched. Especially, the TIG welding is contaminated with metal vapor from anode material. In this case, the heat　transfer to anode is affected by radiation emitted from metal vapor, because of the net emission coefficient emitted from　metal vapor is very high. In this paper, the radiation loss of gas tungsten arc welding affected by current increment is elucidated. When the current increases, the heat transfer to the anode increases, and then the contamination ratio of metal vapor increases. When the contamination ratio of metal vapor increases, the arc temperature changes, and then the heat transfer to the anode changes. As a result, the radiation loss increases with increasing the current. When the metal contamination ratio and its distribution change, the radiation loss changes.

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