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Chinese Journal of Lasers, Volume. 46, Issue 3, 0302011(2019)

Controlling of Laser Welding Porosities of Brass Based on Filled Intermediate Layer of Copper

Meifeng Chen1、*, Guangtao Zhou1,2,3、*, Shikai Wu2, Fang Liu1, and Hua Zhang1
Author Affiliations
  • 1 College of Mechanical Engineering and Automation, Huaqiao University, Xiamen, Fujian 362021, China
  • 2 Beijing Engineering Researching Center of Laser Technology, Beijing University of Technology, Beijing 100124, China
  • 3 State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin, Heilongjiang 150001, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    Figures & Tables(14)
    Welding model

    Fig. 1. Welding model

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    Principle schematics. (a) Schematic of brass sheet welding with intermediate layer of copper; (b) q distribution at weld cross-section

    Fig. 2. Principle schematics. (a) Schematic of brass sheet welding with intermediate layer of copper; (b) q distribution at weld cross-section

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    Porosity distribution in weld surface obtained with normal laser welding. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

    Fig. 3. Porosity distribution in weld surface obtained with normal laser welding. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

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    Porosity distribution in weld surface obtained with laser welding under copper intermediate layer condition. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

    Fig. 4. Porosity distribution in weld surface obtained with laser welding under copper intermediate layer condition. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

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    Porosity distribution in weld interior obtained with normal laser welding. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

    Fig. 5. Porosity distribution in weld interior obtained with normal laser welding. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

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    Porosity distribution in weld interior obtained with laser welding under copper intermediate layer condition. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

    Fig. 6. Porosity distribution in weld interior obtained with laser welding under copper intermediate layer condition. (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

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    Distribution curves of weld porosity. (a) Surface; (b) interior

    Fig. 7. Distribution curves of weld porosity. (a) Surface; (b) interior

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    Dynamic behavior of steam for normal laser welding (t=15 s). (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

    Fig. 8. Dynamic behavior of steam for normal laser welding (t=15 s). (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

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    Dynamic behavior of steam for laser welding under copper intermediate layer condition (t=15 s). (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

    Fig. 9. Dynamic behavior of steam for laser welding under copper intermediate layer condition (t=15 s). (a) 1.0 mm/s; (b) 1.2 mm/s; (c) 2.2 mm/s

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    Microstructure of weld and heat affected zone

    Fig. 10. Microstructure of weld and heat affected zone

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    Distribution curves of weld microhardness

    Fig. 11. Distribution curves of weld microhardness

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    Tensile fracture analysis. (a) Tensile specimen for normal laser welding; (b) tensile specimen for laser welding under copper intermediate layer condition

    Fig. 12. Tensile fracture analysis. (a) Tensile specimen for normal laser welding; (b) tensile specimen for laser welding under copper intermediate layer condition

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    • Table 1. Chemical composition of H62 brass and T2 copper

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      Table 1. Chemical composition of H62 brass and T2 copper

      ElementMass fractionof element inH62 brassElementMass fractionof element inT2 copper
      Cu<63.500Cu>99.900
      Fb0.080Fe0.010
      Fe0.150Ca0.018
      Sb0.005Zn0.005
      P0.010Si0.003
      Others<36.250Others<0.070

    • Table 2. Tensile test results

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      Table 2. Tensile test results

      SampleTensile strength /MPa
      Normal laserweldingLaser welding under copperintermediate layer condition
      1135163
      2143149
      3142159
      Average140157
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    Meifeng Chen, Guangtao Zhou, Shikai Wu, Fang Liu, Hua Zhang. Controlling of Laser Welding Porosities of Brass Based on Filled Intermediate Layer of Copper[J]. Chinese Journal of Lasers, 2019, 46(3): 0302011

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    Paper Information

    Category: laser manufacturing

    Received: Oct. 30, 2018

    Accepted: Dec. 13, 2018

    Published Online: May. 9, 2019

    The Author Email:

    DOI:10.3788/CJL201946.0302011

    Topics

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