Abstract:As one of techniques to improve a penetration depth in a gas tungsten arc welding, it has been proposed that carbon dioxide gas is applied as a shielding gas using a double shielding torch. Two types of gases can flow independently in the double shielding torch: inner gas and outer gas. The purpose of this study was clarification of the carbon dioxide behavior to establish a guideline for controlling oxygen contamination which affects the toughness of welded part formed by this welding process. As a result, it… Show more
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