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<p>In this study, a Stellite 6/WC composite coating was applied to the surface of 45 steel using various laser cladding rates. The phase composition, microstructure, microhardness, and corrosion resistance of the composite coating were examined using XRD, SEM, a micro-Vickers hardness tester, and an electrochemical workstation. The analysis revealed that the composite coating predominantly consists of Co<sub>3</sub>W<sub>3</sub>C and Co<sub>4</sub>W<sub>2</sub>C phases. At a cladding rate of 8&#xa0;mm/s, the WC particles within the coating exhibit significant cracking, resulting in numerous fragments. As the cladding rate increases, the spherical WC particles maintain better integrity, but more cracks extend from within the WC particles to the surrounding structure. The coating produced at a 16&#xa0;mm/s cladding rate exhibiting the highest hardness at 950 HV. The composite coating fabricated at a cladding rate of 10&#xa0;mm/s demonstrated excellent corrosion resistance.</p>

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Effect of Cladding Rate on Microstructure and Properties of Stellite 6/WC Composite Coating

  • 期刊论文

  • 发表日期：

    2025年5月12日

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  • Jian-jun Yang,
  • Kang-wei Zhao,
  • Hai Peng,
  • Fang-fang Li,
  • Cai-he Fan,
  • Qin Wu,
  • Shi-yun Dong,
  • Tao Tao,
  • Zai-yu Zhang

摘要

In this study, a Stellite 6/WC composite coating was applied to the surface of 45 steel using various laser cladding rates. The phase composition, microstructure, microhardness, and corrosion resistance of the composite coating were examined using XRD, SEM, a micro-Vickers hardness tester, and an electrochemical workstation. The analysis revealed that the composite coating predominantly consists of Co3W3C and Co4W2C phases. At a cladding rate of 8 mm/s, the WC particles within the coating exhibit significant cracking, resulting in numerous fragments. As the cladding rate increases, the spherical WC particles maintain better integrity, but more cracks extend from within the WC particles to the surrounding structure. The coating produced at a 16 mm/s cladding rate exhibiting the highest hardness at 950 HV. The composite coating fabricated at a cladding rate of 10 mm/s demonstrated excellent corrosion resistance.