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Laser & Optoelectronics Progress, Volume. 55, Issue 2, 021408(2018)

Effects of Laser Power on Droplet Transfer Behaviour in Laser-MAG Hybrid Welding

Shuang He, Hui Chen*, Yong Chen, Lidong Xu, and Xiaoli Che
Author Affiliations
  • School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
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    References (25)
    Cited By (5)
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    Figures & Tables(12)
    Schematic of welding equipments

    Fig. 1. Schematic of welding equipments

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    Schematic of force acting on droplets. (a) MAG welding; (b) laser-MAG hybrid welding

    Fig. 2. Schematic of force acting on droplets. (a) MAG welding; (b) laser-MAG hybrid welding

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    fz versus θ

    Fig. 3. fz versus θ

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    Droplet images in short-circuiting transfer mode. (a) MAG welding; (b) laser-MAG hybrid welding, P=1000 W; (c) laser-MAG hybrid welding, P=2000 W; (d) laser-MAG hybrid welding, P=3000 W; (e) laser-MAG hybrid welding, P=4000 W

    Fig. 4. Droplet images in short-circuiting transfer mode. (a) MAG welding; (b) laser-MAG hybrid welding, P=1000 W; (c) laser-MAG hybrid welding, P=2000 W; (d) laser-MAG hybrid welding, P=3000 W; (e) laser-MAG hybrid welding, P=4000 W

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    Transition period of droplets versus laser power

    Fig. 5. Transition period of droplets versus laser power

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    Voltage waveforms under different laser powers. (a) Short-circuiting transfer; (b) globule transfer; (c) spray transfer

    Fig. 6. Voltage waveforms under different laser powers. (a) Short-circuiting transfer; (b) globule transfer; (c) spray transfer

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    Droplet images in globule transfer mode. (a) MAG welding; (b) laser-MAG hybrid welding, P=1000 W; (c) laser-MAG hybrid welding, P=2000 W; (d) laser-MAG hybrid welding, P=3000 W; (e) laser-MAG hybrid welding, P=4000 W

    Fig. 7. Droplet images in globule transfer mode. (a) MAG welding; (b) laser-MAG hybrid welding, P=1000 W; (c) laser-MAG hybrid welding, P=2000 W; (d) laser-MAG hybrid welding, P=3000 W; (e) laser-MAG hybrid welding, P=4000 W

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    Droplet images in spray transfer mode. (a) MAG welding; (b) laser-MAG hybrid welding, P=1000 W; (c) laser-MAG hybrid welding, P=2000 W; (d) laser-MAG hybrid welding, P=3000 W

    Fig. 8. Droplet images in spray transfer mode. (a) MAG welding; (b) laser-MAG hybrid welding, P=1000 W; (c) laser-MAG hybrid welding, P=2000 W; (d) laser-MAG hybrid welding, P=3000 W

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    (a) Relationship between weld penetration and laser power; (b) relationship between weld width and laser power

    Fig. 9. (a) Relationship between weld penetration and laser power; (b) relationship between weld width and laser power

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    Weld cross sections under different laser powers. (a) Short-circuiting transfer; (b) globule transfer; (c) spray transfer

    Fig. 10. Weld cross sections under different laser powers. (a) Short-circuiting transfer; (b) globule transfer; (c) spray transfer

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    • Table 1. Chemical compositions of base metal and wire (mass fraction, %)

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      Table 1. Chemical compositions of base metal and wire (mass fraction, %)

      MaterialCSiMnPSCrNiMoCuFe
      Base metal0.02280.5381.310.0268<0.00117.277.330.05180.201Bal.
      Wire0.060.4551.820.030.0319.510.0≤0.75≤0.75Bal.

    • Table 2. Process parameters in welding experiment

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      Table 2. Process parameters in welding experiment

      Welding parameterValue
      Welding speed /(m·min-1)1.0
      Laser power /kW1, 2, 3, 4
      Arc voltage /V24, 27, 32
      Defocusing /mm0
      Laser-arc distance /mm2
      Extension length /mm15
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    Shuang He, Hui Chen, Yong Chen, Lidong Xu, Xiaoli Che. Effects of Laser Power on Droplet Transfer Behaviour in Laser-MAG Hybrid Welding[J]. Laser & Optoelectronics Progress, 2018, 55(2): 021408

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Aug. 29, 2017

    Accepted: --

    Published Online: Sep. 10, 2018

    The Author Email: Hui Chen (xnrpt@swjtu.edu.cn)

    DOI:10.3788/LOP55.021408

    Topics

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