Journal of Welding and Joining

  • 제30권5호
  • /
  • Pages.46-50
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  • 2012
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  • 2466-2232(pISSN)
  • /
  • 2466-2100(eISSN)
대한용접접합학회 (The Korean Welding and Joining Society)
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아연도금강관의 가스메탈아크용접에서 용접인자가 기공형성에 미치는 영향

Effects of Welding Parameters on Porosity Formation in Weld Beads of Galvanized Steel Pipes produced with Gas Metal Arc Welding

  • 임영민 (한국기술교육대학교 신소재공학과) ;
  • 장복수 (정우산기주식회사) ;
  • 고진현 (한국기술교육대학교 신소재공학과)
  • Lim, Young-Min (School of Energy.Materials.Chemical, Korea University of Technology and Education) ;
  • Jang, Bok-Su (Jeong-woo Industrial Machine Co., Ltd.) ;
  • Koh, Jin-Hyun (School of Energy.Materials.Chemical, Korea University of Technology and Education)
  • 투고 : 2012.10.11
  • 심사 : 2012.10.31
  • 발행 : 2012.10.30
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초록

This study was carried out to investigate the effect of welding parameters such as shielding gas compositions welding voltage and welding current on the pore formation in the weld beads of galvanized steel pipes produced with gas metal arc welding. The porosity was evaluated and rated by metallography and radiographic test in terms of weight percentage, number and distribution of pores in weld beads. The porosity increased with increasing welding voltage and current, in which Ar gas produced the most porosity while $Ar+5%O_2$ generated the least porosity. It was found that the porosity could be reduced by selection of the proper gas mixture composition such as $Ar+5%O_2$ and $Ar+10%CO_2$ and by using current (130~150A) and voltage(16~20V).

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참고문헌

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