Narrow-gap laser welding using filler wire of thick steel plates

  • Yong Zhao
  • Shengchong Ma
  • Jian Huang
  • Yixiong Wu


Thick-section steel has been widely used in many heavy industries. Traditionally, very thick steel plates could be welded by using submerged arc welding and other welding processes. However, there were more or less drawbacks in these welding methods. Laser welding, a high-energy density welding method, is being considered for such structures to improve the production efficiency and reduce the residual stresses of the joints. In this study, butt joints with narrow gap were welded using a high-power CO2 laser. The effect of welding parameters including the relative position between the laser beam and the filler wire, welding speed, and the distance from the intersection of the beam and wire to root of the groove on the weld bead geometry and welding defects was studied. Additionally, high-speed photography was introduced in the experiment as an efficient method to record the total process of welding, especially the transfer of molten drop. The study found that when the beam was focused on the center of the groove, the filler wire could be melted successfully even though it would tremble slightly during welding process. The optimized distance from the intersection of the beam and wire to groove root was 3 mm. Later, butt weld joints of 70-mm-thick steel plate without lack of fusion can be obtained under optimized welding parameters.


Narrow gap Thick plate Laser welding with filler wire 


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  1. 1.
    Reisgen U, Schleser M, Mokrov O, Ahmed E (2012) Optimization of laser welding of DP/TRIP steel sheets using statistical approach. Opt Laser Technol 44(1):255–262CrossRefGoogle Scholar
  2. 2.
    Elmesalamy A, Francis JA, Li L (2014) A comparison of residual stresses in multi pass narrow gap laser welds and gas-tungsten arc welds in AISI 316L stainless steel. Int J Press Vessel Pip 113:49–59CrossRefGoogle Scholar
  3. 3.
    Dittrich D, Schedewy R, Brenner B, Standfuß J (2013) Laser multi-pass narrow gap welding of hot crack sensitive thick aluminum plates. Phys Procedia 41:225–233CrossRefGoogle Scholar
  4. 4.
    Guo W, Crowther D, Francis JA, Thompson A, Li L (2016) Process-parameter interactions in ultra-narrow gap laser welding of high strength steels. Int J Adv Manuf Technol 84(9–12):2547–2566CrossRefGoogle Scholar
  5. 5.
    Shi H, Zhang K, Xu Z, Huang T, Fan L, Bao W (2014) Applying statistical models optimize the process of multi-pass narrow-gap laser welding with filler wire. Int J Adv Manuf Technol 75(1–4):279–291CrossRefGoogle Scholar
  6. 6.
    Li R, Yue J, Shao X, Wang C, Yan F, Hu X (2015) A study of thick plate ultra-narrow-gap multi-pass multi-layer laser welding technology combined with laser cleaning. Int J Adv Manuf Technol 81:113–127CrossRefGoogle Scholar
  7. 7.
    Heralić A, Christiansson AK, Lennartson B (2012) Height control of laser metal-wire deposition based on iterative learning control and 3D scanning. Opt Lasers Eng 50(9):1230–1241CrossRefGoogle Scholar
  8. 8.
    Phaoniam R, Shinozaki K, Yamamoto M, Kadoi K, Tsuchiya S, Nishijima A (2013) Development of a highly efficient hot-wire laser hybrid process for narrow-gap welding—welding phenomena and their adequate conditions. Welding in the World 57(5):607–613CrossRefGoogle Scholar
  9. 9.
    Jokinen T, Vihervä T, Riikonen H, Kujanpää V (2000) Welding of ship structural steel A36 using a Nd:YAG laser and gas-metal arc welding. Journal of Laser Applications 12(5):185–188CrossRefGoogle Scholar
  10. 10.
    Patschger A, Sahib C, Bergmann JP, Bastick A (2011) Process optimization through adaptation of shielding gas selection and feeding during laser beam welding. Phys Procedia 12:46–55CrossRefGoogle Scholar
  11. 11.
    Bannour S, Abderrazak K, Mhiri H, Le Palec G (2012) Effects of temperature-dependent material properties and shielding gas on molten pool formation during continuous laser welding of AZ91 magnesium alloy. Opt Laser Technol 44(8):2459–2468CrossRefGoogle Scholar
  12. 12.
    Li S, Chen G, Zhou C (2015) Effects of welding parameters on weld geometry during high-power laser welding of thick plate. Int J Adv Manuf Technol 79:177–182CrossRefGoogle Scholar
  13. 13.
    Zhang W, Hua X, Liao W, Li F, Wang M (2014) Study of metal transfer in CO2 laser+GMAW-P hybrid welding using argon-helium mixtures. Opt Laser Technol 56(1):158–166CrossRefGoogle Scholar

Copyright information

© Springer-Verlag London 2017

Authors and Affiliations

  • Yong Zhao
    • 1
    • 2
  • Shengchong Ma
    • 2
  • Jian Huang
    • 1
  • Yixiong Wu
    • 1
  1. 1.Shanghai Key Laboratory of Materials Laser Processing and ModificationShanghai Jiao Tong UniversityShanghaiChina
  2. 2.Provincial Key Laboratory of Advanced Welding TechnologyJiangsu University of Science and TechnologyZhenjiangChina

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