Demin Zou, Jingang Qi, Lin Zhao, Yang Cao. Effect of Welding Speed on Bead Appearance and Low-Temperature Impact Toughness in Laser-Arc Hybrid Welding[J]. Chinese Journal of Lasers, 2022, 49(8): 0802014
- Chinese Journal of Lasers
- Vol. 49, Issue 8, 0802014 (2022)
Fig. 1. Laser-MIG hybrid welding system
Fig. 2. Effect of welding speed on weld width and reinforcement
Fig. 3. Formation of root humping during laser-arc hybrid welding
Fig. 4. Effect of welding speed on impact absorbed energy of weld metal at －40 ℃
Fig. 5. X-ray radiographs of welds at different welding speeds
Fig. 6. Statistics of X-ray inspection of pores in welds at different welding speeds
Fig. 7. Fracture morphologies of weld metal at welding speed of 0.8 m/min. (a) Macroscopic fracture morphology；(b) porosity; (c) cleavage fracture
Fig. 8. Fracture morphologies of weld metal at welding speed of 1.2 m/min. (a) Macroscopic fracture morphology; (b)(c) dimples
Fig. 9. Microstructures of weld metals (OM). (a) Welding speed of 1.2 m/min; (b) welding speed of 1.5 m/min；(c) welding speed of 1.8 m/min
Fig. 10. Microhardness distribution of welded joints
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Table 1. Chemical composition of base metal and solder wire
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Table 2. Mechanical properties of base metal
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Table 3. Surface appearances and cross-sections of weld at different welding speeds
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