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CHEN Genyu, WANG Bin, ZHONG Peixin, LIU Jianhua, LI Wei. Laser scanning welding of 2060 Al-Li alloy with filler wire[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(4): 44-50. DOI: 10.12073/j.hjxb.20191016002
Citation: CHEN Genyu, WANG Bin, ZHONG Peixin, LIU Jianhua, LI Wei. Laser scanning welding of 2060 Al-Li alloy with filler wire[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2020, 41(4): 44-50. DOI: 10.12073/j.hjxb.20191016002
shu

Laser scanning welding of 2060 Al-Li alloy with filler wire

  • 1.

    State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha，410082，China

  • 2.

    Laser Research Institue, Hunan University, Changsha，410082，China

  • 3.

    Han’s Laser Technology Co., Ltd., Shenzhen，518000，China

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  • Received Date: October 15, 2019
  • Available Online: July 26, 2020
    Graphical Abstract
    • Abstract
  • In order to solve the problems of porosity and insufficient tensile strength of aluminum lithium alloy weld, a method of laser scanning welding with filler wire was proposed. Taking 2060 Al-Li alloy with 2 mm thickness as research objects, the suppression effect of laser scanning welding with filler wire on welding defects of Al-Li alloy was investigated. A high-speed camera system was built to explore the mechanism and the change of the dynamic evolution of the molten pool. The influence of scanning parameters on the formation of porosity in weld seam and the mechanism of inhibiting porosity of laser scanning welding with filler wire technique were investigated. Response surface methodology was applied to explore the influence of process parameters on tensile strength. The quantitative relationship between process parameter combination, tensile strength and the optimal parameter combination were proposed. The maximum tensile strength of the weld is 382 MPa, which is 76.4% of the base metal. The research shows that the flow of the molten pool is stable, and meanwhile the eruption of the keyhole is weak and showing the periodicity, in the process of “∞” shaped laser scanning welding with filler wire. And the process of “∞” shaped laser scanning welding with filler wire can effectively inhibit weld porosity and improve the welding quality of Al-Li alloy.
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    • References (15)
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