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<p>WC-Co cemented carbide is a critical material in industrial applications due to its exceptional mechanical properties. In this work, the effects of trace Cr<sub>3</sub>C<sub>2</sub> addition (0–0.5&#xa0;wt.%) on the microstructural evolution and property enhancement of WC-8.5Co cemented carbides were systematically investigated. The effect of Cr<sub>3</sub>C<sub>2</sub> additives on the microstructural, mechanical, and magnetic behaviors of WC-Co cemented carbides are investigated in a comparative manner. The addition of Cr<sub>3</sub>C<sub>2</sub> significantly refines the WC grain size and suppresses abnormal grain growth primarily through the formation of Cr-rich interfacial layers and the pinning of grain boundaries, which leads to the evidently enhancement of hardness, bending strength, and compressive strength of the alloy as expected. These results demonstrate that Cr<sub>3</sub>C<sub>2</sub> additives are highly effective in optimizing the performance of WC-Co cemented carbides, making them suitable for demanding industrial applications. This study provides valuable insights into the mechanisms of grain refinement and property enhancement in WC-Co alloys, offering a pathway for the development of advanced cemented carbides.</p> Graphical abstract <p></p>

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Microstructure and mechanical behaviors of WC-Co cemented carbides with Cr3C2 regulations

  • 期刊论文

  • 发表日期：

    2026年3月8日

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  • Wenli Li,
  • Jianming Cui,
  • Weibo Guo,
  • Chun Huang,
  • Ailin Li,
  • Liping Wu,
  • Gansheng Zhang,
  • Congcong Xu,
  • Jiakang Qian,
  • Liyong Chen,
  • Jianguo Lu

摘要

WC-Co cemented carbide is a critical material in industrial applications due to its exceptional mechanical properties. In this work, the effects of trace Cr3C2 addition (0–0.5 wt.%) on the microstructural evolution and property enhancement of WC-8.5Co cemented carbides were systematically investigated. The effect of Cr3C2 additives on the microstructural, mechanical, and magnetic behaviors of WC-Co cemented carbides are investigated in a comparative manner. The addition of Cr3C2 significantly refines the WC grain size and suppresses abnormal grain growth primarily through the formation of Cr-rich interfacial layers and the pinning of grain boundaries, which leads to the evidently enhancement of hardness, bending strength, and compressive strength of the alloy as expected. These results demonstrate that Cr3C2 additives are highly effective in optimizing the performance of WC-Co cemented carbides, making them suitable for demanding industrial applications. This study provides valuable insights into the mechanisms of grain refinement and property enhancement in WC-Co alloys, offering a pathway for the development of advanced cemented carbides.

Graphical abstract