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<p>The present study constitutes a systematic investigation into the impact of a synchronized pressure roller treatment on the Ni60-WC laser-melted cladding crack-suppression mechanism and properties. The investigation involves the introduction of a synchronized pressure roller process, with the objective of elucidating its influence on these parameters. The experiments were conducted using 45# steel as the supporting material and Ni60 containing 25 wt.% WC alloy powder. The composition, microstructure, microhardness, and wear characteristics of the melt-coated layer were analyzed by optimizing the laser power parameters (2400 W) and roller load (0–6&#xa0;kg). The findings demonstrate that the use of the synchronized printing roller significantly reduces the crack susceptibility of the fused cladding. Furthermore, XRD analysis indicates that the primary microstructures of the fused cladding include γ-Ni(Fe), M23C6, Ni3Fe, WC, and W2C. The microhardness exhibited a decrease in response to an increase in loading force; the hardness at 6-kg loading force decreased by 20.91% in comparison with that of the conventional process. However, the abrasion resistance was improved by 34.94% (the abrasion mark cross-sectional area decreased from 5093.94 μm<sup>2</sup> to 3313.63 (μm<sup>2</sup>).</p>

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Influence of Synchronized Pressure Rollers on Crack Suppression Mechanism and Properties of Ni60-WC Laser Cladding Layer

  • 期刊论文

  • 发表日期：

    2026年1月16日

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  • Haifeng Zhang,
  • Huaichen Guo,
  • Xiaoping Hu,
  • Jiyuan Tao,
  • Wenhan She,
  • Changlong Zhao

摘要

The present study constitutes a systematic investigation into the impact of a synchronized pressure roller treatment on the Ni60-WC laser-melted cladding crack-suppression mechanism and properties. The investigation involves the introduction of a synchronized pressure roller process, with the objective of elucidating its influence on these parameters. The experiments were conducted using 45# steel as the supporting material and Ni60 containing 25 wt.% WC alloy powder. The composition, microstructure, microhardness, and wear characteristics of the melt-coated layer were analyzed by optimizing the laser power parameters (2400 W) and roller load (0–6 kg). The findings demonstrate that the use of the synchronized printing roller significantly reduces the crack susceptibility of the fused cladding. Furthermore, XRD analysis indicates that the primary microstructures of the fused cladding include γ-Ni(Fe), M23C6, Ni3Fe, WC, and W2C. The microhardness exhibited a decrease in response to an increase in loading force; the hardness at 6-kg loading force decreased by 20.91% in comparison with that of the conventional process. However, the abrasion resistance was improved by 34.94% (the abrasion mark cross-sectional area decreased from 5093.94 μm2 to 3313.63 (μm2).