Laser & Optoelectronics Progress, Volume. 57, Issue 1, 011405(2020)

Microstructure and Properties of 40CrNiMoA Steel Surface After Laser Quenching

Zhen Yang1, Xiangfang Fan1、*, Changjun Qiu1, Yong Li2, and Ning Liu2
Author Affiliations
  • 1College of Mechanical Engineering, University of South China, Hengyang, Hunan 421001, China
  • 2Hengyan Sino-Steel Hengzhong Equipment Co. Ltd., Hengyang, Hunan 421002, China
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    Figures & Tables(8)
    Cross-sectional morphology of laser-quenched 40CrNiMoA steel. (a) Photograph of low-power stereo microscope; (b) photograph of high-power stereo microscope
    Microstructures of substrate surface and phase-transformation hardening zone after laser-quenching. (a) Substrate; (b) phase-transformation hardening zone
    Microhardness distribution of cross section of laser quenched specimen
    Friction coefficient as a function of time
    Morphologies of surface after wear. (a) Substrate; (b) laser-quenched sample
    Electrochemical corrosion curves of different samples
    • Table 1. Chemical compositions of 40CrNiMoA steel

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      Table 1. Chemical compositions of 40CrNiMoA steel

      Type of elementCMnSiCrNiMoFe
      Standard mass fraction /%0.37--0.440.50--0.800.17--0.370.60--0.901.25--1.650.15--0.25margin
      Detection mass fraction /%0.410.700.280.701.380.16margin
    • Table 2. Loss of weight and average friction coefficient of sample

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      Table 2. Loss of weight and average friction coefficient of sample

      Type of sampleLoss ofweight /mgAverage frictioncoefficient
      Substrate3.60.880
      Quenched-sample1.30.506
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    Zhen Yang, Xiangfang Fan, Changjun Qiu, Yong Li, Ning Liu. Microstructure and Properties of 40CrNiMoA Steel Surface After Laser Quenching[J]. Laser & Optoelectronics Progress, 2020, 57(1): 011405

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    Paper Information

    Category: Lasers and Laser Optics

    Received: May. 10, 2019

    Accepted: Jul. 15, 2019

    Published Online: Jan. 3, 2020

    The Author Email: Fan Xiangfang (hefanyibang@163.com)

    DOI:10.3788/LOP57.011405

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