• Chinese Journal of Lasers
  • Vol. 49, Issue 2, 0202020 (2022)
Xiaohui Han1, Zhiyi Zhang1, Guolong Ma1, Laijun Wu2、3, Xiaoguo Song2、3, Houqin Wang2, and Caiwang Tan2、3、*
Author Affiliations
  • 1CRRC Qingdao Sifang Co., LTD., Qingdao, Shandong 266111, China
  • 2State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
  • 3Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology at Weihai, Weihai, Shandong 264209, China
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    DOI: 10.3788/CJL202249.0202020 Cite this Article Set citation alerts
    Xiaohui Han, Zhiyi Zhang, Guolong Ma, Laijun Wu, Xiaoguo Song, Houqin Wang, Caiwang Tan. Effects of Heat Source Angle on Weld Formation and Porosity Defects of Laser-MIG Hybrid Welding of 6A01 Aluminum Alloy[J]. Chinese Journal of Lasers, 2022, 49(2): 0202020 Copy Citation Text show less

    Abstract

    Conclusions

    Aluminum alloy profiles based on laser-MIG hybrid welding were studied for high-speed trains, and the influence of different heat source angles on the welding characteristics, including appearance, pores and melt flowing, was investigated. Results show that the weld depth decreases with an increase in the angle between the laser and the welding direction. When the laser source angle is increased from 82.5° to 110°, the penetration depth and weld width decrease by 50% and 25%, respectively. Moreover, increasing the heat source angle is conducive for reducing the weld pores. When the laser source angle is increased from 82.5° to 97.5°, the weld porosity decreases from 3% to 0%. Moreover, the droplet transfer mode was observed under different heat source angles and the length of the molten pool was promoted by increasing the angle between the laser and the welding direction. Fluent simulation results suggested that the heat source angle has significant effects on energy propagation. With an increase in the angle between the laser and the welding direction, the propagation of energy in the depth direction will decrease. The heating range increases with increasing arc angle, which is beneficial for prolonging the solidification time of molten pools and the eliminating weld pores.

    Xiaohui Han, Zhiyi Zhang, Guolong Ma, Laijun Wu, Xiaoguo Song, Houqin Wang, Caiwang Tan. Effects of Heat Source Angle on Weld Formation and Porosity Defects of Laser-MIG Hybrid Welding of 6A01 Aluminum Alloy[J]. Chinese Journal of Lasers, 2022, 49(2): 0202020
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