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<p>In order to improve the wear resistance of austempered ductile iron (ADI) under different loads in sliding wear conditions, this study investigated the influence of partial austenitizing temperature on the microstructure, mechanical properties, and tribological behavior of dual-phase austempered ductile iron (DP-ADI). Furthermore, the phase composition, hardness, tensile properties, and the sliding wear resistance of DP-ADI specimens under loads of 20 N and 50 N were analyzed. The results indicate that as the austenitization temperature increases from 810 to 870&#xa0;°C, the volume fraction of proeutectoid ferrite decreases from 92.0 to 8.8%, and this promotes the formation of ausferrite. The tensile strength and hardness increase by 59.9% and 82.7%, respectively, while the elongation decreases from 11.2 to 1.8%. In the low-load sliding wear test with a load of 20 N, for the DP-ADI specimens treated at 850&#xa0;°C, the graphite nodules were cut by the friction pair, forming a lubricating layer on the worn surface. This demonstrated the best anti-friction performance, with a friction coefficient of only 0.03. In the 50 N high-load sliding friction and wear test, as the hardness rises, the load-bearing capacity of the matrix is enhanced. Consequently, the extent of plastic deformation on the worn surface is effectively curbed. This, in turn, diminishes the adhesive interaction between the friction pairs and the formation of abrasive particles, thereby lowering the friction coefficient. This study analyzed the sliding friction and wear characteristics of DP-ADI under different loads, uncovering the application potential of DP-ADI in sliding wear scenarios. It is expected to promote its further application in related fields.</p>

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Effect of Partial Austenitizing on Microstructure and Friction Behavior of Dual-Phase ADI

  • 期刊论文

  • 发表日期：

    2025年7月20日

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  • Xinming Liu,
  • Hongkui Zhang,
  • Wendong Xu,
  • Yihan Hao,
  • Shian Zhu,
  • Wei Zhang,
  • Yingdong Qu,
  • Guanglong Li

摘要

In order to improve the wear resistance of austempered ductile iron (ADI) under different loads in sliding wear conditions, this study investigated the influence of partial austenitizing temperature on the microstructure, mechanical properties, and tribological behavior of dual-phase austempered ductile iron (DP-ADI). Furthermore, the phase composition, hardness, tensile properties, and the sliding wear resistance of DP-ADI specimens under loads of 20 N and 50 N were analyzed. The results indicate that as the austenitization temperature increases from 810 to 870 °C, the volume fraction of proeutectoid ferrite decreases from 92.0 to 8.8%, and this promotes the formation of ausferrite. The tensile strength and hardness increase by 59.9% and 82.7%, respectively, while the elongation decreases from 11.2 to 1.8%. In the low-load sliding wear test with a load of 20 N, for the DP-ADI specimens treated at 850 °C, the graphite nodules were cut by the friction pair, forming a lubricating layer on the worn surface. This demonstrated the best anti-friction performance, with a friction coefficient of only 0.03. In the 50 N high-load sliding friction and wear test, as the hardness rises, the load-bearing capacity of the matrix is enhanced. Consequently, the extent of plastic deformation on the worn surface is effectively curbed. This, in turn, diminishes the adhesive interaction between the friction pairs and the formation of abrasive particles, thereby lowering the friction coefficient. This study analyzed the sliding friction and wear characteristics of DP-ADI under different loads, uncovering the application potential of DP-ADI in sliding wear scenarios. It is expected to promote its further application in related fields.