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Chinese Journal of Lasers, Volume. 46, Issue 9, 902006(2019)

Welding Seam Forming Mechanism of High-Strength Steel Laser-Metal Inert Gas Hybrid Welding with Butt Gap

Liu Zhengjun1, Gu Siyuan1, Zhang Peilei1,2、*, Yu Zhishui1,2, Ye Xin1,2, and Gu Yong3
Author Affiliations
  • 1School of Materials Engineering, Shanghai University of Engineering Science, Shanghai 201620, China
  • 2Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai 201620, China
  • 3Shanghai Huizhong Automotive Manufacturing Co., Ltd, Shanghai 200122, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (11)
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    References (13)
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    Figures & Tables(11)
    Schematics of laser-MIG hybrid welding setup with butt gap and heat source

    Fig. 1. Schematics of laser-MIG hybrid welding setup with butt gap and heat source

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    Morphologies of laser-MIG hybrid welding seams with different butt gaps

    Fig. 2. Morphologies of laser-MIG hybrid welding seams with different butt gaps

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    Arc shape high speed photographs of laser-MIG arc hybrid welding with different butt gaps

    Fig. 3. Arc shape high speed photographs of laser-MIG arc hybrid welding with different butt gaps

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    Three cross-section shape diagrams of laser-MIG hybrid welding arc plasma. (a)(c) Arc striking/arcing with either side of test plate; (b) arc striking/arcing with both test plates at the same time

    Fig. 4. Three cross-section shape diagrams of laser-MIG hybrid welding arc plasma. (a)(c) Arc striking/arcing with either side of test plate; (b) arc striking/arcing with both test plates at the same time

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    Diagram of forming mechanism of laser-MIG hybrid welding with butt gap

    Fig. 5. Diagram of forming mechanism of laser-MIG hybrid welding with butt gap

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    Microhardness and microstructure sampling position diagrams of upper and lower welds

    Fig. 6. Microhardness and microstructure sampling position diagrams of upper and lower welds

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    Midline microhardness and microstructures of weld upper and lower parts of A0 mm and A0.5 mm welds. (a) Microhardness; (b)-(e) microstructures

    Fig. 7. Midline microhardness and microstructures of weld upper and lower parts of A0 mm and A0.5 mm welds. (a) Microhardness; (b)-(e) microstructures

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    Midline microhardness and microstructures of weld upper and lower parts of B0 mm and B1.0 mm welds. (a) Microhardness; (b)-(e) microstructures

    Fig. 8. Midline microhardness and microstructures of weld upper and lower parts of B0 mm and B1.0 mm welds. (a) Microhardness; (b)-(e) microstructures

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    Midline microhardness diagram and weld upper and lower parts diagram of C0 mm and C1.5 mm welds. (a) Microhardness; (b)-(e) microstructures

    Fig. 9. Midline microhardness diagram and weld upper and lower parts diagram of C0 mm and C1.5 mm welds. (a) Microhardness; (b)-(e) microstructures

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    • Table 1. Chemical compositions of high-strength steel and JM-56 wire

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      Table 1. Chemical compositions of high-strength steel and JM-56 wire

      MaterialMass fraction /%
      CSiMnNiTiNbCuFe
      HR420LA≤0.1≤0.5≤1.6≤0.15≤0.009Bal.
      JM-560.06-0.150.8-1.151.40-1.85≤0.15≤0.5Bal.

    • Table 2. Welding parameters of laser-MIG hybrid welding with different butt gaps

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      Table 2. Welding parameters of laser-MIG hybrid welding with different butt gaps

      ParameterA0 mm and A0.5 mmB0 mm and B1.0 mmC0 mm and C1.5 mm
      Laser power /W200040004900
      Welding speed /(m·min-1)222
      Wire feeding velocity /(m·min-1)4.51016
      Voltage /V161624
      Defocus amount /mm000
      Shielding gas flow rate /(L·min-1)151515
      Distance of laser and wire /mm2.51.52.5
      Angle of welding torch /(°)553525
      Welding wire extension /mm152025
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    Liu Zhengjun, Gu Siyuan, Zhang Peilei, Yu Zhishui, Ye Xin, Gu Yong. Welding Seam Forming Mechanism of High-Strength Steel Laser-Metal Inert Gas Hybrid Welding with Butt Gap[J]. Chinese Journal of Lasers, 2019, 46(9): 902006

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    Paper Information

    Category: laser manufacturing

    Received: Jan. 25, 2019

    Accepted: --

    Published Online: Sep. 10, 2019

    The Author Email: Peilei Zhang (peilei@sues.edu.cn)

    DOI:10.3788/CJL201946.0902006

    Topics

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