Laser & Optoelectronics Progress, Volume. 57, Issue 3, 031402(2020)

Microstructure and Corrosion Behaviors of 316L Coating Fabricated by Laser Cladding

Peng Liu1, Zhikai Chen2,3、*, Quanming Jin1, and Qinghai Zhu2,3
Author Affiliations
  • 1Xuzhou Construction Machinery Group Hydraulics Business Division, Xuzhou, Jiangsu 221004, China
  • 2Jiangsu Xuzhou Construction Machinery Research Institute Co., Ltd., Xuzhou, Jiangsu 221004, China
  • 3State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, Xuzhou, Jiangsu 221004, China
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    Figures & Tables(10)
    Surface of 316L coating when energy density is less than or equal to 19 J·mm-2
    Microstructures of 316L coating. (a) Cross-sectional morphology; (b) microstructure of cellular crystal; (b) microstructure of columnar crystal; (d) microstructure of overlapping zone
    Relationship between hardness and energy density of 316L coating and schematic of microstructures. (a) Hardness of coating under different energy densities; (b)-(d) microstructures under energy densities of 19, 28, and 44 J·mm-2, respectively
    SEM image of 316L coating under magnification of 3000
    Polarization curves. (a) Substrate; (b) 316L coating
    Corrosion morphologies of substrate and 316L coating after suffering acid salt spray tests with different time. (a) Substrate after 16 h; (b) 316L coating after 16 h; (c) 316L coating after 96 h; (d) 316L coating after 350 h
    Micro corrosion morphologies of 316L coating after suffering acid salt spray for 350 h. (a) 100×; (b) 500×
    • Table 1. Elemental compositions of 316L metal powder (mass fraction, %)

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      Table 1. Elemental compositions of 316L metal powder (mass fraction, %)

      FeCCrMoSiMnNi
      Bal.≤0.0816-182-31210-14
    • Table 2. Processing parameters of 316L metal powder

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      Table 2. Processing parameters of 316L metal powder

      Power /WScanningspeed /(mm·s-1)Powderfeeding /(r·min-1)Energydensity /(J·mm-2)
      2200101.244.00
      2800202.028.00
      3400303.422.67
      3800402.419.00
      3800404.019.00
      3800503.015.20
    • Table 3. Elemental contents of P1 and P2 points (mass fraction, %)

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      Table 3. Elemental contents of P1 and P2 points (mass fraction, %)

      PositionCrFeNiMo
      P117.2066.4213.233.16
      P218.9265.0313.043.01
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    Peng Liu, Zhikai Chen, Quanming Jin, Qinghai Zhu. Microstructure and Corrosion Behaviors of 316L Coating Fabricated by Laser Cladding[J]. Laser & Optoelectronics Progress, 2020, 57(3): 031402

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    Paper Information

    Category: Lasers and Laser Optics

    Received: May. 29, 2019

    Accepted: Jul. 25, 2019

    Published Online: Feb. 17, 2020

    The Author Email: Chen Zhikai (chenzhikai2004@126.com)

    DOI:10.3788/LOP57.031402

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