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
- Laser & Optoelectronics Progress
- Vol. 55, Issue 2, 021408 (2018)
Fig. 1. Schematic of welding equipments
Fig. 2. Schematic of force acting on droplets. (a) MAG welding; (b) laser-MAG hybrid welding
Fig. 3. fz versus θ
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
Fig. 5. Transition period of droplets versus laser power
Fig. 6. Voltage waveforms under different laser powers. (a) Short-circuiting transfer; (b) globule transfer; (c) spray transfer
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
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
Fig. 9. (a) Relationship between weld penetration and laser power; (b) relationship between weld width and laser power
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 2. Process parameters in welding experiment
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