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Laser & Optoelectronics Progress, Volume. 58, Issue 9, 0914001(2021)

Characteristics of Femtosecond Laser Microprecision Ablation of 18Cr2Ni4WA Steel Used in Face Gears

Rui Ming1, Jingwei Shen1, Mingtao Lai1, Yulong Ma2, Xian Zhou2, and Xingzu Ming1,2、*
Author Affiliations
  • 1School of Mechanical Engineering, Hunan University of Technology, Zhuzhou , Hunan 412007, China
  • 2School of Mechanical Engineering, Hubei University of Arts and Sciences, Xiangyang, Hubei 441053, China
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    AbstractGet PDF(in Chinese)
    Figures&Tables (12)
    Equations (14)
    References (19)
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    Figures & Tables(12)
    Electron and lattice temperatures of ablated material of face gear under different pulse widths. （a） Electron temperature;（b） lattice temperature

    Fig. 1. Electron and lattice temperatures of ablated material of face gear under different pulse widths. （a） Electron temperature;（b） lattice temperature

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    Electron and lattice temperatures of ablated material of face gear under different average powers. （a） 0.7 W; （b） 0.9 W;（c） 2 W; （d） 3.5 W

    Fig. 2. Electron and lattice temperatures of ablated material of face gear under different average powers. （a） 0.7 W; （b） 0.9 W;（c） 2 W; （d） 3.5 W

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    Electron and lattice temperatures of ablated face gear material at high average power. （a） 6.45 W; （b） 7.83 W

    Fig. 3. Electron and lattice temperatures of ablated face gear material at high average power. （a） 6.45 W; （b） 7.83 W

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    Three-dimensional temperature field distributions of electron and lattice at an average power of 2 W. （a） Electron； （b） lattice

    Fig. 4. Three-dimensional temperature field distributions of electron and lattice at an average power of 2 W. （a） Electron； （b） lattice

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    Three-dimensional temperature field distributions of electron and lattice at an average power of 6 W. （a） Electron； （b） lattice

    Fig. 5. Three-dimensional temperature field distributions of electron and lattice at an average power of 6 W. （a） Electron； （b） lattice

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    Schematic of femtosecond laser micromachining system

    Fig. 6. Schematic of femtosecond laser micromachining system

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    Energy density distribution of Gaussian beam

    Fig. 7. Energy density distribution of Gaussian beam

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    Relationship between D2 and ln P under single pulse laser

    Fig. 8. Relationship between D2 and ln P under single pulse laser

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    Ablative ring morphologies under different average powers. （a） 3.5 W; （b） 4.98 W; （c） 6.45 W; （d） 10.04 W

    Fig. 9. Ablative ring morphologies under different average powers. （a） 3.5 W; （b） 4.98 W; （c） 6.45 W; （d） 10.04 W

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    Micro-morphologies of tooth ablation pit under different pulse numbers. （a） N=10; （b） N=100; （c） N=200; （d） N=500

    Fig. 10. Micro-morphologies of tooth ablation pit under different pulse numbers. （a） N=10; （b） N=100; （c） N=200; （d） N=500

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    • Table 1. Simulation parameters

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      Table 1. Simulation parameters

      ParameterSymbol/unitValue
      Electron specific heat capacityCe /（J·K-2·m-3）7.064×102
      Lattice specific heat capacityCi /(J·K-1·m-3)3.5×106
      Densityρ /(kg·m-3)7.91×103
      Absorption rateα /m-17.1×107
      ReflectivityR0.51
      Coupling coefficientg /(W·m-3·K-1)1.3×1018
      Fermi temperatureTF /K1.28×105
      Thermal conductivity coefficientk /(W·m-1·K-1)78.4
      Melting temperatureTm/K1724
      Evaporation temperatureTn /K3023

    • Table 2. Chemical composition of face gear material 18Cr2Ni4WA

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      Table 2. Chemical composition of face gear material 18Cr2Ni4WA

      ElementNiCrWMnSiCCuPS
      Mass fraction/%4.191.470.890.370.240.160.1000.0120.011
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    Rui Ming, Jingwei Shen, Mingtao Lai, Yulong Ma, Xian Zhou, Xingzu Ming. Characteristics of Femtosecond Laser Microprecision Ablation of 18Cr2Ni4WA Steel Used in Face Gears[J]. Laser & Optoelectronics Progress, 2021, 58(9): 0914001

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    Paper Information

    Category: Lasers and Laser Optics

    Received: Jul. 18, 2020

    Accepted: Sep. 22, 2020

    Published Online: May. 12, 2021

    The Author Email: Ming Xingzu (mxz9036@126.com)

    DOI:10.3788/LOP202158.0914001

    Topics

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