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<p>In order to prepare high-quality coatings with high bonding strength and dense structure, this paper first uses laser cladding technology to prepare in situ WC-reinforced nickel-based multi-track coatings on the surface of H13 steel, and then, laser remelting is carried out on the WC/Ni-based multi-track coatings by scanning the laser along different paths. This is the systematic study of the effects of four laser scanning paths: vertical path, oblique path, offset path, and original path, on the macroscopic morphology, microstructure, and mechanical properties of laser-remelted specimens. The results show that the higher the degree of overlap between the scanning path of laser remelting and the laser cladding path, the more uniform the distribution of the internal microstructure of the coating. When the remelting path and the cladding path coincide, cracks and pores in the coating are largely eliminated. The ceramic particles inside the coating almost completely dissolve and react with the nickel-based alloy to form a large number of MC carbides, thereby giving the coating the most uniform microstructure and mechanical properties.</p>

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Effects of Laser Remelting Path on Internal Defects, Element Distribution, and Properties of In Situ WC/ Ni-Based Cladding Coatings

  • 期刊论文

  • 发表日期：

    2025年6月30日

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  • Yingying Meng,
  • F. P. Yao,
  • Yuhang Yang,
  • Jinhua Li

摘要

In order to prepare high-quality coatings with high bonding strength and dense structure, this paper first uses laser cladding technology to prepare in situ WC-reinforced nickel-based multi-track coatings on the surface of H13 steel, and then, laser remelting is carried out on the WC/Ni-based multi-track coatings by scanning the laser along different paths. This is the systematic study of the effects of four laser scanning paths: vertical path, oblique path, offset path, and original path, on the macroscopic morphology, microstructure, and mechanical properties of laser-remelted specimens. The results show that the higher the degree of overlap between the scanning path of laser remelting and the laser cladding path, the more uniform the distribution of the internal microstructure of the coating. When the remelting path and the cladding path coincide, cracks and pores in the coating are largely eliminated. The ceramic particles inside the coating almost completely dissolve and react with the nickel-based alloy to form a large number of MC carbides, thereby giving the coating the most uniform microstructure and mechanical properties.