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<p>The issue of corrosion and protection of the rack and pinion components of the lifting system on offshore wind power operation and maintenance platforms presents a significant challenge in the advancement and utilization of offshore wind energy. This research focused on the application of an Inconel 718 fusion cladding layer onto the surface of 17CrNiMo<sub>6</sub> using coaxial powder feeding laser cladding equipment. The study investigated the microstructure and corrosion resistance of the fusion cladding layer, substrate, and fusion cladding interface. The findings revealed that the interface bonding of the fusion cladding layer was superior, the microhardness of the heat-affected zone (HAZ) decreased notably, the microhardness of the fusion cladding layer increased with its height, and the fusion cladding layer exhibited a tensile yield strength of 340&#xa0;MPa and a tensile strength of 591&#xa0;MPa. Additionally, the fusion cladding interface displayed a compressive yield strength of 903&#xa0;MPa and a compressive yield stress of 2553&#xa0;MPa. Corrosion experiments indicated that as the concentration of NaCl solution rose, the corrosion resistance of the substrate and fusion cladding layer decreased. The substrate developed loose and porous corrosion products. The Inconel 718 cladding layer exhibited lower self-corrosion current density, higher self-corrosion potential, slower corrosion rate, smoother corrosion morphology, and better corrosion resistance. Consequently, the reconditioned lifting system rack of the offshore wind power operation and maintenance platform could significantly enhance its service life.</p>

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Mechanical and Corrosion Resistance Properties of the Inconel 718 Alloy Laser Welded to the Surface of 17CrNiMo6

  • 期刊论文

  • 发表日期：

    2025年7月1日

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  • Daqi Li,
  • Bingtao Hu,
  • Bailibing Jiang,
  • Yujie Song

摘要

The issue of corrosion and protection of the rack and pinion components of the lifting system on offshore wind power operation and maintenance platforms presents a significant challenge in the advancement and utilization of offshore wind energy. This research focused on the application of an Inconel 718 fusion cladding layer onto the surface of 17CrNiMo6 using coaxial powder feeding laser cladding equipment. The study investigated the microstructure and corrosion resistance of the fusion cladding layer, substrate, and fusion cladding interface. The findings revealed that the interface bonding of the fusion cladding layer was superior, the microhardness of the heat-affected zone (HAZ) decreased notably, the microhardness of the fusion cladding layer increased with its height, and the fusion cladding layer exhibited a tensile yield strength of 340 MPa and a tensile strength of 591 MPa. Additionally, the fusion cladding interface displayed a compressive yield strength of 903 MPa and a compressive yield stress of 2553 MPa. Corrosion experiments indicated that as the concentration of NaCl solution rose, the corrosion resistance of the substrate and fusion cladding layer decreased. The substrate developed loose and porous corrosion products. The Inconel 718 cladding layer exhibited lower self-corrosion current density, higher self-corrosion potential, slower corrosion rate, smoother corrosion morphology, and better corrosion resistance. Consequently, the reconditioned lifting system rack of the offshore wind power operation and maintenance platform could significantly enhance its service life.