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<p>To enhance the wear resistance of 35CrMoV steel, WC/Ni60 composite coatings with varying WC contents (0-20%) were prepared on the surface of 35CrMoV steel through laser cladding. The impact of WC contents on the microstructure and wear resistance of the WC/Ni60 composite coatings was investigated by analyzing the phase composition, microstructure, microhardness, and wear resistance. The experimental results indicate that no cracks appear in the composite coatings after adding WC particles; however, unfused particles are observed at the bottom. The WC/Ni60 composite coatings mainly consist of γ-(Fe, Ni), W<sub>2</sub>C, and Cr<sub>23</sub>C<sub>6</sub> phases. The microstructure reveals planar crystals at the bonding interface, columnar crystals at the bottom, and equiaxed crystals in the middle and top regions. The microhardness of the WC/Ni60 composite coatings increases with higher WC content, surpassing that of the substrate. Both wear amount and maximum wear depth initially increase and then decrease with increasing WC contents. Optimal wear resistance is achieved with 10%WC content in the composite coating. These findings contribute to improving our understanding of preparing better properties in WC/Ni60 composite coatings and provide a reference for enhancing the wear resistance of 35CrMoV parts.</p>

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Effect of WC Content on the Wear Resistance of WC/Ni60 Composite Coatings on 35CrMoV Steel by Laser Cladding

  • 期刊论文

  • 发表日期：

    2025年5月9日

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  • Yanbin Du,
  • Hongxi Chen,
  • Zhiqiang Li,
  • Qiang Liang

摘要

To enhance the wear resistance of 35CrMoV steel, WC/Ni60 composite coatings with varying WC contents (0-20%) were prepared on the surface of 35CrMoV steel through laser cladding. The impact of WC contents on the microstructure and wear resistance of the WC/Ni60 composite coatings was investigated by analyzing the phase composition, microstructure, microhardness, and wear resistance. The experimental results indicate that no cracks appear in the composite coatings after adding WC particles; however, unfused particles are observed at the bottom. The WC/Ni60 composite coatings mainly consist of γ-(Fe, Ni), W2C, and Cr23C6 phases. The microstructure reveals planar crystals at the bonding interface, columnar crystals at the bottom, and equiaxed crystals in the middle and top regions. The microhardness of the WC/Ni60 composite coatings increases with higher WC content, surpassing that of the substrate. Both wear amount and maximum wear depth initially increase and then decrease with increasing WC contents. Optimal wear resistance is achieved with 10%WC content in the composite coating. These findings contribute to improving our understanding of preparing better properties in WC/Ni60 composite coatings and provide a reference for enhancing the wear resistance of 35CrMoV parts.