Co-Cr3C2 coating incorporating grain refinement and dislocation density gradient to enhance wear resistance of 24CrNiMo steel

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-01-19 DOI:10.1016/j.wear.2025.205752

Haobing Hu , Gongbin Tang , Zhitao Cheng , Yiting Pan , Zongbi Huang , Wenfeng Ding , Zhongwei Liang

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引用次数: 0

Abstract

High-speed train brake discs, crucial components of the braking system, predominantly fail due to high-temperature wear that critically affects their performance and lifespan. Here, we introduce a novel method that incorporates ultrasonic shot peening with Co-Cr₃C₂ particles to create a composite modified layer (referred to as UEG) on the surface of 24CrNiMo brake discs. Friction test results show that UEG-treated samples maintain a more stable coefficient of friction and exhibit lower wear rates across a temperature range of 25–600 °C compared to Untreated samples. Particularly at 600 °C, the wear rate of UEG-treated samples is reduced by 72 %. Detailed experiments and analyses have determined that the enhancements in high-temperature stability and wear resistance of UEG-treated samples are due to the presence of grain refinement and a gradient in dislocation density. These findings suggest that UEG treatment holds substantial potential for improving the high-temperature wear resistance of brake discs, providing innovative insights and approaches for their application.

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.