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Abstract <p>The wear resistance of heat-treated Co25Cr5Mo5W alloy fabricated <i>via</i> laser powder bed fusion was investigated. The results indicate that heat treatment significantly enhances the wear resistance of the alloy, with the specimen heat-treated at 900°C exhibiting the best performance-achieving approximately 50% lower wear rate compared to the as-built alloy. This improvement is attributed to the heat treatment promoting the formation of fine, dispersed Co<sub>3</sub>(Mo, W)<sub>2</sub>Si precipitates, averaging ~ 100&#xa0;nm in size. However, increasing the heat treatment temperature beyond 900°C induces precipitate coarsening, enlarging particles to over 300&#xa0;nm. A high content of these coarse precipitates detrimentally impacts wear resistance of the alloy.</p> Graphical abstract <p></p>

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Effect of heat treatment on the wear resistance of Co25Cr5Mo5W alloy fabricated via laser powder bed fusion

  • 期刊论文

  • 发表日期：

    2025年10月28日

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  • Xiaojuan Li,
  • Wenting Jiang,
  • Caihe Fan,
  • Song Ni,
  • Min Song

摘要

Abstract

The wear resistance of heat-treated Co25Cr5Mo5W alloy fabricated via laser powder bed fusion was investigated. The results indicate that heat treatment significantly enhances the wear resistance of the alloy, with the specimen heat-treated at 900°C exhibiting the best performance-achieving approximately 50% lower wear rate compared to the as-built alloy. This improvement is attributed to the heat treatment promoting the formation of fine, dispersed Co3(Mo, W)2Si precipitates, averaging ~ 100 nm in size. However, increasing the heat treatment temperature beyond 900°C induces precipitate coarsening, enlarging particles to over 300 nm. A high content of these coarse precipitates detrimentally impacts wear resistance of the alloy.

Graphical abstract