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Chinese Journal of Lasers, Volume. 51, Issue 16, 1602102(2024)

Study on Coaxial Dual-Beam Laser Welding Process and Microstructure and Properties of Nodular Cast Iron QT500 and Alloy Steel 20MnCr5

Shuaishuai Chen1, Wendong Zhang1, Xianghuan Liu2, Qiyun Chen2, Boyang Li1, Shuanghao Cui2, Liming Liu1, and Hongyang Wang1、*
Author Affiliations
  • 1Liaoning Provincial Key Laboratory of Advanced Connection Technology, School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning , China
  • 2Zhuzhou Gear Co., Ltd., Zhuzhou 412000, Hunan , China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (14)
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    References (20)
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    Figures & Tables(14)
    Metallographic structures of base materials. (a) QT500-7; (b) 20MnCr5

    Fig. 1. Metallographic structures of base materials. (a) QT500-7; (b) 20MnCr5

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    Schematic of welding device structure

    Fig. 2. Schematic of welding device structure

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    Tensile sampling position and tensile sample size

    Fig. 3. Tensile sampling position and tensile sample size

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    Weld morphologies under different pulse laser powers

    Fig. 4. Weld morphologies under different pulse laser powers

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    Weld cross-sections under different offset distances. (a) 0 mm; (b) 0.1 mm; (c) 0.2 mm; (d) 0.3 mm

    Fig. 5. Weld cross-sections under different offset distances. (a) 0 mm; (b) 0.1 mm; (c) 0.2 mm; (d) 0.3 mm

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    Characterization of welds under different offset distances

    Fig. 6. Characterization of welds under different offset distances

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    Microstructures of bond zones on side of ductile iron under different offset distances. (a) Offset distance of 0 mm; (b) offset distance of 0.2 mm toward steel side

    Fig. 7. Microstructures of bond zones on side of ductile iron under different offset distances. (a) Offset distance of 0 mm; (b) offset distance of 0.2 mm toward steel side

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    Microstructures of heat-affected zones on side of ductile iron under different magnification powers. (a) 200×; (b) 500×

    Fig. 8. Microstructures of heat-affected zones on side of ductile iron under different magnification powers. (a) 200×; (b) 500×

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    Structure of heat-affected zone at steel side

    Fig. 9. Structure of heat-affected zone at steel side

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    Tensile strength of joints under different pulse laser powers

    Fig. 10. Tensile strength of joints under different pulse laser powers

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    Tensile strength of joints under different offset distances

    Fig. 11. Tensile strength of joints under different offset distances

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    Fracture morphologies under different offsets. (a)‒(c) Dual-beam laser offset distance of 0 mm; (d)‒(f) dual-beam laser offset distance of 0.2 mm toward steel side

    Fig. 12. Fracture morphologies under different offsets. (a)‒(c) Dual-beam laser offset distance of 0 mm; (d)‒(f) dual-beam laser offset distance of 0.2 mm toward steel side

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    Hardness curves of different areas under different offset distances

    Fig. 13. Hardness curves of different areas under different offset distances

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    • Table 1. Chemical compositions of base metal and welding wire (mass fraction, %)

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      Table 1. Chemical compositions of base metal and welding wire (mass fraction, %)

      MaterialCSiMnSPNiReNb+TaFe
      QT500-73.550‒3.8502.320‒2.860<0.600<0.025<0.080‒0.030-0.050‒Bal.
      20MnCr50.170‒0.220≤0.2501.100‒1.5000.010‒0.030≤0.030‒‒‒Bal.
      ERNICR-3≤0.100≤0.5002.500‒3.500≤0.015≤0.030≥67.000‒2.000‒3.000Bal.
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    Shuaishuai Chen, Wendong Zhang, Xianghuan Liu, Qiyun Chen, Boyang Li, Shuanghao Cui, Liming Liu, Hongyang Wang. Study on Coaxial Dual-Beam Laser Welding Process and Microstructure and Properties of Nodular Cast Iron QT500 and Alloy Steel 20MnCr5[J]. Chinese Journal of Lasers, 2024, 51(16): 1602102

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    Paper Information

    Category: Laser Forming Manufacturing

    Received: Aug. 29, 2023

    Accepted: Nov. 20, 2023

    Published Online: Apr. 17, 2024

    The Author Email: Wang Hongyang (wang-hy@dlut.edu.cn)

    DOI:10.3788/CJL231150

    Topics

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