Al0.6CoCrFeNiTi/TiC高熵合金熔覆层组织与摩擦磨损行为

doi:10.3901/JME.2025.10.141

机械工程学报 ›› 2025, Vol. 61 ›› Issue (10): 141-151.doi: 10.3901/JME.2025.10.141

• 特邀专栏：高端装备表面强化防护与再制造 • 上一篇下一篇

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Al_0.6CoCrFeNiTi/TiC高熵合金熔覆层组织与摩擦磨损行为

程靖越¹, 姚海华², 赵万新¹, 杨延格³, 王国红¹, 周正^1,4

1. 北京工业大学材料科学与工程学院北京 100124;
2. 北京工业大学物理与光电工程学院北京 100124;
3. 中国科学院金属研究所师昌绪先进材料创新中心沈阳 110016;
4. 北京工业大学材料循环低碳再生全国重点实验室北京 100124

收稿日期:2024-08-12 修回日期:2024-12-12 出版日期:2025-05-20 发布日期:2025-07-12
作者简介:程靖越，男，2002年出生。主要研究方向为高熵合金涂层。E-mail：Cheng@emails.bjut.edu.cn;姚海华(通信作者)，女，1987年出生，博士，助理研究员，硕士研究生导师。主要研究方向为亚稳态金属材料。E-mail：yaohaihua@bjut.edu.cn
基金资助:
国家自然科学基金资助项目(52171060，52001025)。

Microstructure and Frictional Wear Behavior of Al_0.6CoCrFeNiTi/TiC Cladding Layers

CHENG Jingyue¹, YAO Haihua², ZHAO Wanxin¹, YANG Yange³, WANG Guohong¹, ZHOU Zheng^1,4

1. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124;
2. School of Physics and Optoelectronic Engineering, Beijing University of Technology, Beijing 100124;
3. Shi-changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016;
4. State Key Laboratory of Materials Low-carbon Recycling, Beijing University of Technology, Beijing 100124

Received:2024-08-12 Revised:2024-12-12 Online:2025-05-20 Published:2025-07-12

摘要/Abstract

摘要： 针对连铸辊表面耐磨防护需求，采用激光熔覆技术制备Al_0.6CoCrFeNiTi/TiC高熵合金熔覆层，研究TiC析出量对熔覆层组织与不同温度下摩擦磨损行为的影响。结果表明，HEA-C0熔覆层(无TiC析出)由无序BCC结构的A2相(富Fe-Cr)和有序BCC结构的B2相(富Al-Ni-Ti)构成。随着TiC析出量增加，固溶Ti元素含量减少，熔覆层基体组织向A2相转变，且A2相硬度逐渐降低。HEA-C0熔覆层磨损率随温度上升而显著增大，呈现出较强的温度敏感性。TiC析出相在高温下强化作用显著，但A2相硬度降低对熔覆层耐磨性有不利影响，综合作用下HEA-C0.5(TiC部分析出)熔覆层从室温至600℃具有相对最为优异的耐磨性。高熵合金熔覆层磨损机制随温度升高发生转变，25℃时主要为疲劳磨损和轻微氧化磨损，300℃时由粘着磨损和磨粒磨损主导，600℃时转变为氧化磨损和磨粒磨损为主。

关键词: 高熵合金, 激光熔覆, 微观组织结构, 摩擦磨损

Abstract: Al_0.6CoCrFeNiTi/TiC high-entropy alloy cladding layers were prepared by laser cladding to meet the wear-resistant need of continuous casting rollers. The effects of TiC precipitates on the microstructure and frictional wear behavior at different temperatures of the cladding layers were investigated. The results show that the HEA-C0 cladding layer (TiC precipitates free) is composed of A2 phase (Fe-Cr rich) with disordered BCC structure and B2 phase (Al-Ni-Ti rich) with ordered BCC structure. The matrix structure of cladding layer transforms to single A2 phase with the increase of TiC precipitates, due to the decrease of Ti content in solid solution, and the hardness of A2 phase decreases gradually. The wear rate of HEA-C0 cladding layer significantly increases with the elevated temperature, showing a strong temperature-sensitivity. The TiC precipitates exhibit a remarkable strengthening effect at high-temperature, but the decreased hardness of A2 phase hampers the wear resistance of the cladding layer. Combining the conflicting effects, the HEA-C0.5 (TiC partially precipitated) cladding layer presents a superior wear resistance from room temperature to 600 ℃. The wear mechanism of the high-entropy alloy cladding layer alters with the elevated temperature, which is dominated by fatigue wear and slight oxidation wear at 25 ℃, and adhesive wear and abrasive wear at 300 ℃, and oxidative wear and abrasive wear at 600 ℃.

Key words: high-entropy alloy, laser cladding, microstructure, frictional wear

中图分类号:

TG174

程靖越, 姚海华, 赵万新, 杨延格, 王国红, 周正. Al_0.6CoCrFeNiTi/TiC高熵合金熔覆层组织与摩擦磨损行为[J]. 机械工程学报, 2025, 61(10): 141-151.

CHENG Jingyue, YAO Haihua, ZHAO Wanxin, YANG Yange, WANG Guohong, ZHOU Zheng. Microstructure and Frictional Wear Behavior of Al_0.6CoCrFeNiTi/TiC Cladding Layers[J]. Journal of Mechanical Engineering, 2025, 61(10): 141-151.

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Al_0.6CoCrFeNiTi/TiC高熵合金熔覆层组织与摩擦磨损行为

Microstructure and Frictional Wear Behavior of Al_0.6CoCrFeNiTi/TiC Cladding Layers

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Al0.6CoCrFeNiTi/TiC高熵合金熔覆层组织与摩擦磨损行为

Microstructure and Frictional Wear Behavior of Al0.6CoCrFeNiTi/TiC Cladding Layers

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Al_0.6CoCrFeNiTi/TiC高熵合金熔覆层组织与摩擦磨损行为

Microstructure and Frictional Wear Behavior of Al_0.6CoCrFeNiTi/TiC Cladding Layers