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The characteristics of bead welding on steel with process parameter during the laser-arc hybrid welding(II) - Effect of heat input parameters -

강의 레이저-아크 하이브리드 용접시 공정변수에 따른 비드용접특성 (II) - 용접 입열 변수의 영향 -

  • Kim, Jond-Do (Division of Marine Engineering, Korea Maritime and Ocean Univ.) ;
  • Myung, Gi-Hoon (Graduate School, Korea Maritime and Ocean Univ.) ;
  • Park, In-Duck (Busan Laser Application Support Center, Korea Institute of Machinery & Materials)
  • 김종도 (한국해양대학교 기관공학부) ;
  • 명기훈 (한국해양대학교 대학원 기관공학과) ;
  • 박인덕 (한국기계연구원 부산레이저기술지원센터)
  • Received : 2015.04.17
  • Accepted : 2015.04.29
  • Published : 2015.04.30

Abstract

The laser-arc hybrid welding of SS400 steel was carried out with the use of disk laser equipment of 6.6kW maximum power and MAG equipment of pulse mode. Parameter regarding heat input is one of the most important factors that directly affect penetration characteristics and welding defect. Therefore in this study, the effects of laser power, welding speed and current, voltage and pulse correction were investigated. As experiment result, it was found that the lower heat input, the more likely humping bead is formed at the back, and such humping bead could be suppressed by increasing laser power and arc current or decreasing welding speed, thus increasing heat input. Also deep penetration could be achieved by reducing arc voltage or pulse correction parameter in the same welding condition.

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