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<p>As a key component in the field of metallurgy, a descaling roller has harsh service conditions. Fatigue wear and corrosion failure are prone to occur to it. The continuous production of steel rolling is affected. It is shown by practice that the surface of the descaling roller through plasma surfacing welding of nickel-based WC alloy can have its surface properties effectively enhanced. It is of great significance to prolong the service life and save the cost of the roller. At present, there have been few studies conducted on nickel-based WC materials for plasma surfacing welding on descaling roller, and it is urgent to perform related work. In this paper, 70 wt&#xa0;pct NiCrBSi + 30 wt&#xa0;pct WC powder and 40 wt&#xa0;pct pctNiCrBSi+60 wt&#xa0;pct WC powder are used as surfacing materials to perform plasma surfacing welding on descaling roller. Finally, the surfacing layer was characterized by SEM, XRD, microhardness, friction, and wear testing. On this basis, a numerical model with multi-field coupling of temperature, stress, and flow velocity during the plasma surfacing welding process was established. The transient evolution mechanisms of temperature, stress, and melt flow velocity during the plasma surfacing welding were revealed. Through the combination of numerical simulation and experimental study, the correlation between powder composition, surfacing layer microstructure, surfacing layer properties, and welding mechanism is revealed. A theoretical foundation for the preparation of high-performance coating on the surface of descaling roller is provided, which has significant engineering application value and practical significance.</p>

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Investigation of Ni/WC Composite Formation and Properties Using Plasma-Transferred Arc Surfacing on Descaling Rollers: Simulation and Experiment

  • 期刊论文

  • 发表日期：

    2025年7月16日

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  • Lei Feng,
  • Chang Li,
  • Fanhong Kong,
  • Xing Han,
  • Fenghua Luo,
  • Han Sun

摘要

As a key component in the field of metallurgy, a descaling roller has harsh service conditions. Fatigue wear and corrosion failure are prone to occur to it. The continuous production of steel rolling is affected. It is shown by practice that the surface of the descaling roller through plasma surfacing welding of nickel-based WC alloy can have its surface properties effectively enhanced. It is of great significance to prolong the service life and save the cost of the roller. At present, there have been few studies conducted on nickel-based WC materials for plasma surfacing welding on descaling roller, and it is urgent to perform related work. In this paper, 70 wt pct NiCrBSi + 30 wt pct WC powder and 40 wt pct pctNiCrBSi+60 wt pct WC powder are used as surfacing materials to perform plasma surfacing welding on descaling roller. Finally, the surfacing layer was characterized by SEM, XRD, microhardness, friction, and wear testing. On this basis, a numerical model with multi-field coupling of temperature, stress, and flow velocity during the plasma surfacing welding process was established. The transient evolution mechanisms of temperature, stress, and melt flow velocity during the plasma surfacing welding were revealed. Through the combination of numerical simulation and experimental study, the correlation between powder composition, surfacing layer microstructure, surfacing layer properties, and welding mechanism is revealed. A theoretical foundation for the preparation of high-performance coating on the surface of descaling roller is provided, which has significant engineering application value and practical significance.