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Chinese Journal of Lasers, Volume. 45, Issue 10, 1002004(2018)

Effect of Laser-Arc Distance on Surface Flow of Laser-GMAW Hybrid Welding Molten Pool

Liu Jia1,2、*, Li Zhong1,2, Shi Yan1,2, Bai Chenming1,2, and Zhang Hong1,2
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  • 1[in Chinese]
  • 2[in Chinese]
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    References (18)
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    Schematic of laser-GMAW hybrid welding

    Fig. 1. Schematic of laser-GMAW hybrid welding

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    Surface morphology of molten pool during laser-GMAW hybrid welding of high strength steel (DLA=1 mm). (a) t=0 ms; (b) t=5 ms; (c) t=10 ms; (d) t=15 ms; (e) t=20 ms; (f) t=25 ms; (g) t=30 ms; (h) t=35 ms; (i) t=40 ms; (j) trajectory of tracer particle

    Fig. 2. Surface morphology of molten pool during laser-GMAW hybrid welding of high strength steel (DLA=1 mm). (a) t=0 ms; (b) t=5 ms; (c) t=10 ms; (d) t=15 ms; (e) t=20 ms; (f) t=25 ms; (g) t=30 ms; (h) t=35 ms; (i) t=40 ms; (j) trajectory of tracer particle

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    Surface morphology of molten pool during laser-GMAW hybrid welding of high strength steel (DLA=3 mm). (a) t=0 ms; (b) t=5 ms; (c) t=10 ms; (d) t=15 ms; (e) t=20 ms; (f) t=25 ms; (g) t=30 ms; (h) t=35 ms; (i) t=55 ms; (j) t=75 ms; (k) t=95 ms; (l) t=100 ms; (m) t=105 ms; (n) t=110 ms; (o) t=115 ms; (p) trajectory of tracer particles

    Fig. 3. Surface morphology of molten pool during laser-GMAW hybrid welding of high strength steel (DLA=3 mm). (a) t=0 ms; (b) t=5 ms; (c) t=10 ms; (d) t=15 ms; (e) t=20 ms; (f) t=25 ms; (g) t=30 ms; (h) t=35 ms; (i) t=55 ms; (j) t=75 ms; (k) t=95 ms; (l) t=100 ms; (m) t=105 ms; (n) t=110 ms; (o) t=115 ms; (p) trajectory of tracer particles

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    Surface morphology of molten pool in laser-GMAW hybrid welding of high strength steel(DLA=5 mm). (a) t=0 ms; (b) t=5 ms; (c) t=10 ms; (d) t=15 ms; (e) t=20 ms; (f) t=25 ms; (g) t=30 ms; (h) t=35 ms;(i) t=40 ms; (j) t=45 ms; (k) t=50 ms; (l) t=55 ms; (m) trajectory of tracer particle

    Fig. 4. Surface morphology of molten pool in laser-GMAW hybrid welding of high strength steel(DLA=5 mm). (a) t=0 ms; (b) t=5 ms; (c) t=10 ms; (d) t=15 ms; (e) t=20 ms; (f) t=25 ms; (g) t=30 ms; (h) t=35 ms;(i) t=40 ms; (j) t=45 ms; (k) t=50 ms; (l) t=55 ms; (m) trajectory of tracer particle

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    Schematics of the trajectory of tracer particles at various forces.(a) DLA=1 mm; (b) DLA=3 mm; (c) DLA=5 mm

    Fig. 5. Schematics of the trajectory of tracer particles at various forces.(a) DLA=1 mm; (b) DLA=3 mm; (c) DLA=5 mm

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    Schematic for measuring the flow distance of a tracer particle

    Fig. 6. Schematic for measuring the flow distance of a tracer particle

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    Effect of laser-arc distance on flow distance of tracer particle

    Fig. 7. Effect of laser-arc distance on flow distance of tracer particle

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    Effect of laser-arc distance on transition period of droplets

    Fig. 8. Effect of laser-arc distance on transition period of droplets

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    Simulated thermal cycle curves of laser-GMAW hybrid welding at different laser-arc distances. (a) Whole view; (b) partial view

    Fig. 9. Simulated thermal cycle curves of laser-GMAW hybrid welding at different laser-arc distances. (a) Whole view; (b) partial view

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    Laser-GMAW hybrid welding seam morphology at different laser-arc distances. (a) DLA=1 mm; (b) DLA=3 mm; (c) DLA=5 mm

    Fig. 10. Laser-GMAW hybrid welding seam morphology at different laser-arc distances. (a) DLA=1 mm; (b) DLA=3 mm; (c) DLA=5 mm

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    • Table 1. Chemical composition of base metal and filler metal (mass fraction)%

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      Table 1. Chemical composition of base metal and filler metal (mass fraction)%

      MaterialCCrNiSiMnMoPSFe
      HG785D0.110.60.750.281.40.50.0250.015Bal.
      HCr20Ni10Mn7Mo0.6520.2610.230.606.271.030.020.01Bal.

    • Table 2. Process parameters of laser-GMAW hybrid welding

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      Table 2. Process parameters of laser-GMAW hybrid welding

      Processing parameterValue
      Laser power P /kW2.5
      Arc current I /A200
      Arc voltage U /V26
      Defocusing distance Δf /mm-2
      Laser-arc distance DLA /mm1, 2, 3, 4, 5
      Flow rate of shieldinggas fg /(L·min-1)30
      Flow rate of GMAW shieldinggas fwg /(L·min-1)15
      Welding speed v /(m·min-1)0.8
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    Liu Jia, Li Zhong, Shi Yan, Bai Chenming, Zhang Hong. Effect of Laser-Arc Distance on Surface Flow of Laser-GMAW Hybrid Welding Molten Pool[J]. Chinese Journal of Lasers, 2018, 45(10): 1002004

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    Paper Information

    Category: laser manufacturing

    Received: Apr. 2, 2018

    Accepted: --

    Published Online: Oct. 12, 2018

    The Author Email: Jia Liu (liujia@cust.edu.cn)

    DOI:10.3788/cjl201845.1002004

    Topics

    laser devices and laser physics
    Lasers and Laser Optics
    Laser physics
    laser manufacturing
    Instrumentation, Measurement and Metrology