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


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.


  1. Surendar Marys, et al, Overview of Recent Advances in Welding, 溶接學會誌, 79(4) (2010), 292-298 (in Japanese)
  2. Tsubota S. Koga H, Application of Laser Arc Hybrid Welding to Shipbuilding, Jnl. of JWS 79(7) (2010), 7-10 (in Japanese)
  3. S.M. Kelly, S.W. Brown, Using Hybrid Laser-Arc Welding to Reduce Distortion in Ship Panels, Welding Jnl. March, (2009), 32-36
  4. Y NAITO, Penetration Characteristics in YAG Laser and TIG-Arc Hybrid Welding and Arc and Plasma/P lume Behavior during Welding, Quarterly Jnl. of JWS, 24(1) (2006), 32-38 (in Japanese)
  5. Y. Naito, S. Katayama, Penetration Characteristics in YAG Laser and TIG Arc Hybrid Welding, and Arc and Plasma/Plume Behavior during Welding, Quarterly Jnl. of JWS 24(1) (2006), 32-38 (in Japanese)
  6. Ascari. A, Fortunato. A, The Influence of Process on Porosity Formation in Hybrid Laser-GMA Welding of AA6062 Aluminum Alloy, Optic and Laser Technology, 44(5) (2012), 1465-1490
  7. Han-Sur Bang, Chong-In Oh, Hee-Seon Bang, Chan-Seung Ro, Yoon-Ki Lee, The Comparison of the Thermal and Mechanical Characteristic in Butt Joint for Ship Structure Thick Plate AH32 Steel by SAW & Hybrid(CO2 Laser+MIG)Welding, Journal of KWJS, 26(5) (2008), 29-35 (in Korean)
  8. Ming Gao, Shuwen Mei, Process and Joint Characteri-zations of Laser-MIG Hybrid Welding of AZ31 Magnesium Alloy, Journal of Materials Processing Technology, 212 (2012), 1338-1346
  9. Shin Minhyo, NAKATA Kazuhiro, Study on Weld Bead Formation with Square-Groove Butt Joint by 10kW Class Fiber Laser-MAG Arc Hybrid Welding, Jnl. of JWS, 29(3) (2011), 181-186 (in Japanese)