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<p>This study employed novel oscillating laser cladding technology to fabricate AlCoCrFeNi-xWC (x = 0, 10, 20, and 30%&#xa0;wt.%) composite cladding layers on the surface of 35CrMo alloy steel and investigated the effect of WC content on the microstructure and properties of the AlCoCrFeNi cladding layers. Results indicate that with increasing WC content, the phase composition of the AlCoCrFeNi-xWC composite cladding layers evolves from FCC and BCC phases to FCC phase, BCC phase, WC, W<sub>2</sub>C, and Cr<sub>23</sub>C<sub>6</sub>. The undecomposed WC particles and newly formed carbides promoted grain refinement in the cladding layer, ultimately resulting in a microstructure predominantly composed of dense honeycomb-like equiaxed structure, with a minor presence of unmelted WC particles. The addition of WC enhances both the hardness and wear resistance of the AlCoCrFeNi cladding layer, with the most significant improvement observed at a WC content of 30&#xa0;wt.%. At this composition, the cladding layer exhibits a microhardness of 614.7 HV<sub>0.5</sub>, an average coefficient of friction of 0.304, and a wear rate of 7.0 × 10<sup>−5</sup>&#xa0;mm<sup>3</sup>/Nm.</p>

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Microstructure Evolution and Tribological Properties of Oscillating Laser-Clad AlCoCrFeNi-xWC Composite Coatings

  • 期刊论文

  • 发表日期：

    2026年3月18日

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  • Kaiming Wang,
  • Biao Xie,
  • Xiaolei Yan,
  • Zhiyi He,
  • Yonggang Tong,
  • Dongqing Li,
  • Jian Gu,
  • Jiang Ju

摘要

This study employed novel oscillating laser cladding technology to fabricate AlCoCrFeNi-xWC (x = 0, 10, 20, and 30% wt.%) composite cladding layers on the surface of 35CrMo alloy steel and investigated the effect of WC content on the microstructure and properties of the AlCoCrFeNi cladding layers. Results indicate that with increasing WC content, the phase composition of the AlCoCrFeNi-xWC composite cladding layers evolves from FCC and BCC phases to FCC phase, BCC phase, WC, W2C, and Cr23C6. The undecomposed WC particles and newly formed carbides promoted grain refinement in the cladding layer, ultimately resulting in a microstructure predominantly composed of dense honeycomb-like equiaxed structure, with a minor presence of unmelted WC particles. The addition of WC enhances both the hardness and wear resistance of the AlCoCrFeNi cladding layer, with the most significant improvement observed at a WC content of 30 wt.%. At this composition, the cladding layer exhibits a microhardness of 614.7 HV0.5, an average coefficient of friction of 0.304, and a wear rate of 7.0 × 10−5 mm3/Nm.