Narrow-gap laser-MIG hybrid welding of thick-section steel with different shielding gas nozzles

  • Chuang Cai
  • Liqun LiEmail author
  • Lei Tai


Three different shielding gas nozzles were designed for the narrow-gap laser-MIG hybrid welding of thick-section steel. Different gas flow behaviors produced by the three nozzles exerted great effects on the welding characteristics. While using the straight-trapezium shielding gas nozzle, unstable droplet transfer behavior with spatters and welding current wave were observed due to the unstable and high velocity of shielding gas. The weld with a mass of pores in a honeycomb distribution at the surface was produced by using the straight-trapezium nozzle, since the aft part of the molten pool could not be protected effectively during the welding process. Stable droplet transfer behavior and current wave were realized; qualified welds almost with no pores at the surface were obtained by using the square-outlet nozzle with boss or circle-outlet nozzle with boss.


Narrow-gap laser-MIG hybrid welding Shielding gas nozzle Gas flow behavior Welding characteristics 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Gomez M, Valles P, Medina SF (2011) Evolution of microstructure and precipitation state during thermomechanical processing of a X80 microalloyed steel. Mater Sci Eng A 528:4761–4773CrossRefGoogle Scholar
  2. 2.
    Kelly SM, Brown SW, Tressler JF, Martukanitz RP, Ludwig MJ (2009) Using hybrid laser arc welding to reduce distortion in ship panels. Weld J 88:32–36Google Scholar
  3. 3.
    Balart MJ, Knott JF (2006) Effects of geometry and flow properties on the fracture toughness of a C–Mn reactor pressure vessel steel in the lower shelf region. Int J Pres Ves Pip 83:205–215CrossRefGoogle Scholar
  4. 4.
    Christensen KH, Sorensen T, Kristensen JK (2005) Gas metal arc welding of butt joint with varying gap width based on neural networks. Sci Technol Weld Join 10:32–43CrossRefGoogle Scholar
  5. 5.
    Shinji I, Masatoshi M, Yuji K (2008) Application of narrow gap welding process with high speed rotating arc to box column joints of heavy thick plates. Jfe Giho: 15–19Google Scholar
  6. 6.
    Wang JY, Ren YS, Yang F, Guo HB (2007) Novel rotation arc system for narrow gap MAG welding. Sci Technol Weld Join 12:505–507CrossRefGoogle Scholar
  7. 7.
    Cai XY, Lin SB, Fan CL, Yang CL, Zhang W, Wang YW (2016) Molten pool behaviour and weld forming mechanism of tandem narrow gap vertical GMAW. Sci Technol Weld Join 21:124–130CrossRefGoogle Scholar
  8. 8.
    Sun QJ, Wang JF, Cai CW, Li Q, Feng JC (2016) Optimization of magnetic arc oscillation system by using double magnetic pole to TIG narrow gap welding. Int J Adv Manuf Technol 86:761–767CrossRefGoogle Scholar
  9. 9.
    Wang JF, Sun QJ, Feng JC, Wang SL, Zhao HY (2016) Characteristics of welding and arc pressure in TIG narrow gap welding using novel magnetic arc oscillation. Int J Adv Manuf Technol (In press)Google Scholar
  10. 10.
    Jokinen T, Kujanpaa V (2003) High power Nd:YAG laser welding in manufacturing of vacuum vessel of fusion reactor. Fusion Eng Des 69:349–353CrossRefGoogle Scholar
  11. 11.
    Zhang XD, Ashida E, Tarasawa S, Anma Y, Okada M, Katayama S, Mizutani M (2011) Welding of thick stainless steel plates up to 50 mm with high brightness lasers. J Laser Appl 23:022002CrossRefGoogle Scholar
  12. 12.
    Chen YB, Feng JC, Li LQ, Chang S, Ma GL (2013) Microstructure and mechanical properties of a thick-section high-strength steel welded joint by novel double-sided hybrid fibre laser-arc welding. Mater Sci Eng A 582:284–293CrossRefGoogle Scholar
  13. 13.
    Cao XJ, Wanjara P, Huang J, Munro C, Nolting A (2011) Hybrid fiber laser-arc welding of thick section high strength low alloy steel. Mater Des 32:3399–3413CrossRefGoogle Scholar
  14. 14.
    Launder BE, Spalding DB (1974) The numerical computation of turbulent flows. Comp Meth Appl Mech Eng 3:269–289CrossRefzbMATHGoogle Scholar
  15. 15.
    Campana G, Ascari A, Fortunato A, Tani G (2009) Hybrid laser-MIG welding of aluminum alloys: the influence of shielding gases. Appl Surf Sci 255:5588–5590CrossRefGoogle Scholar

Copyright information

© Springer-Verlag London 2017

Authors and Affiliations

  1. 1.State Key Laboratory of Advanced Welding and JoiningHarbin Institute of TechnologyHarbinChina

Personalised recommendations