Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지

A Study on $CO_2$ Laser-TIG Hybrid Welding of Zinc-Coated Steel Sheet Part 1: Analysis of Welding Phenomena

아연도금 강판의 $CO_2$ 레이저-TIG 하이브리드 용접에 관한 연구 Part 1 : 용접현상분석

  • 김철희 (한국생산기술연구원 정밀접합팀) ;
  • 최웅용 (삼성전자 디지털미디어 총괄) ;
  • 채현병 (한국생산기술연구원 정밀접합팀) ;
  • 김정한 (한국생산기술연구원 정밀접합팀) ;
  • 이세헌 (한양대학교 공과대학 기계공학부)
  • Published : 2006.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

In lap welding of zinc-coated steel, porosity formation is one of most significant weld defects, which is caused by zinc vapor generated between the steel sheets. Various solutions have been proposed in the past years but development of more effective method is a worthwhile subject to be investigated. In this study, autogenous laser welding and laser-TIG hybrid welding was applied to the lap welding of zinc-coated steel without gap, and weld pool behaviors were observed by using high speed camera and the porosity generation mechanism was analyzed. The weld defects were successfully eliminated by laser-TIG hybrid welding. This is because the leading TIG arc partially melted the upper sheet and vaporized/oxidized the coated zinc on the lapped surfaces prior to the trailing laser illuminating the specimen.

Keywords

References

  1. 대한용접학회편: 용접.접합편람, 대한용접학회, 1998, 608 (in Korean)
  2. Y.-K. Oh and H. Park: Application of Welding Technology to Automotive Industry, Journal of KWS, 20-5 (2002), 583-587 (in Korean)
  3. H. Zefferer and T. Morris: Guidelines for Laser Welding of Sheet Metal, Welding Journal, 84-8 (2005), 23s-28s
  4. G. S. Brady and H. R. Clauser: Materials Handbook (12th Edition), McGraw-Hill Book Co., 1989
  5. R. Akhter, W. M. Steen and D. Cruciani: Laser Welding of Zinc Coated Steel, Lasers in Manufacturing (LIM), 1988, 195-206
  6. M. Ono, S. Kaizu, M. Ohmura, M. Kabasawa and K. Mori: Laser Welding of Zinc Coated Steel, Quarterly Journal of Japan Welding Society, 15-3 (1997), 438-444 (in Japanese) https://doi.org/10.2207/qjjws.15.438
  7. Y-F. Tzeng: Pulsed Nd:YAG Laser Seam Welding of Zinc-Coated Steel, Welding Journal, 78-7 (1999), 238s-244s
  8. M.M.S. Gualini: Experimental Result of Laser Welding of Zinc Coated Steel Sheets with a New Method, International Congress on Applications of Laser & Electro-Optics(ICALEO), LMP Section A, 2003, 274-284
  9. M. G. Forrest and F. Lu: Advanced Dual Beam Welding of Zinc-Coated Steel Sheets in Lap Joint Configuration with Zero Gap at the Interface, International Congress on Applications of Laser & Electro-Optics(ICALEO), Laser Welding & Brazing Section, 2004, 112-119
  10. M.M.S. Gualini: Laser Welding of Zinc Coated Steel Sheets, an Old Problem with a Possible Solution, International Congress on Applications of Laser & Electro-Optics(ICALEO), Section C, 2001, Paper No. P511
  11. W. M. Steen, M. Eboo and J. Clarke: Arc Augmented Laser Welding, Advances in Welding Processes Proceedings, 4th International Conference, Harrogate, U. K., May 9-11, 1978
  12. N. Abe and H. Hayashi: Trends in Laser Arc Combination Welding Methods, Welding International, 16-2 (2002), 94-98 https://doi.org/10.1080/09507110209549498
  13. C. Bagger and F. O. Olsen : Review of Laser Hybrid Welding, Journal of Laser Applications, 17-1 (2005), 2-14 https://doi.org/10.2351/1.1848532
  14. H. Gu and R. Miller : Hybrid Welding of Galvanized Steel Sheet, International Congress on Applications of Laser & Electro-Optics(ICALEO), Section A, 2001, Paper No. 304