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<p>To clarify the mechanism of iron and cobalt elements inter-diffusion on its tribological performance, the interfacial pairs between cemented carbide inserts and iron powders were prepared and heated in a muffle furnace. Then, the surface mechanical parameters and tribological performance were measured and evaluated. Experimental results showed that the element diffusion phenomena were induced at cemented carbide inserts and iron powder interfaces, the degree of which was affected by heating temperature. Moreover, a corresponding change for tribological performance was also occurred, and the values of it heated in iron powders were all better than that of in air cases. Thus, a 7.6% reduction for interfacial friction coefficient was obtained along with 3.5% decreasing of wear quantity at heating temperature of 600 °C. The primary reason is that, under heating treatment process, the iron powders alleviate the deterioration degree of surface morphology due to its isolation function against oxygen. Meanwhile, the diffusion of iron element on sample surface replenishes the lattice spacing of cobalt leaching, which improves its surface hardness and tribological performance to a certain extent.</p>

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Element Diffusion and Wear Mechanisms at the Cemented Carbide and Iron Material Interfaces for High-Temperature Treatment Conditions

  • 期刊论文

  • 发表日期：

    2026年2月2日

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  • Yan Zhao,
  • Zengyong Xu,
  • Dongming Jia,
  • Lei Zhang,
  • Liukui Yuan

摘要

To clarify the mechanism of iron and cobalt elements inter-diffusion on its tribological performance, the interfacial pairs between cemented carbide inserts and iron powders were prepared and heated in a muffle furnace. Then, the surface mechanical parameters and tribological performance were measured and evaluated. Experimental results showed that the element diffusion phenomena were induced at cemented carbide inserts and iron powder interfaces, the degree of which was affected by heating temperature. Moreover, a corresponding change for tribological performance was also occurred, and the values of it heated in iron powders were all better than that of in air cases. Thus, a 7.6% reduction for interfacial friction coefficient was obtained along with 3.5% decreasing of wear quantity at heating temperature of 600 °C. The primary reason is that, under heating treatment process, the iron powders alleviate the deterioration degree of surface morphology due to its isolation function against oxygen. Meanwhile, the diffusion of iron element on sample surface replenishes the lattice spacing of cobalt leaching, which improves its surface hardness and tribological performance to a certain extent.