GMAW 작업성 및 용접금속 기계적 성질에 미치는 차폐가스 및 용접와이어 성분의 영향

Abstract

The factors affecting workability and mechanical properties of weld metal in GMAW such as shielding gas, surface active element(S), specific resistance of wire were investigated. These factors were varied independently to get different welding characteristics. By increase of oxygen content in weld metal, toughness of weld metal was decreased. By increase of surface active element(S), surface tension of weld metal decreased. And by different surface treatment of weld wire resulted in different specific resistance and thus showed different deposition rate.