对偶材料对铜-石墨复合材料载流摩擦磨损性能的影响

吴海红; 王能慧; 张礼松; 叶佳钰; 王传锋; 涂有旺; 康潇

doi:10.19976/j.cnki.43-1448/TF.2024063

粉末冶金材料科学与工程 >

2024 , Vol. 29 >Issue 5: 384 - 395

DOI: https://doi.org/10.19976/j.cnki.43-1448/TF.2024063

工艺技术

对偶材料对铜-石墨复合材料载流摩擦磨损性能的影响

吴海红 ,
王能慧 ,
张礼松 ,
叶佳钰 ,
王传锋 ,
涂有旺 ,
康潇

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1.中南大学材料科学与工程学院,长沙 410083;
2.中船九江海洋装备(集团)有限公司,九江 332008;
3.中南大学粉末冶金国家重点实验室,长沙 410083

收稿日期: 2024-07-09

修回日期: 2024-09-17

网络出版日期: 2024-11-18

基金资助

江西省重大科技研发专项项目(20223AAE01002)

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Effects of counterpart materials on the current-carrying friction and wear properties of copper-graphite composites

WU Haihong ,
WANG Nenghui ,
ZHANG Lisong ,
YE Jiayu ,
WANG Chuanfeng ,
TU Youwang ,
KANG Xiao

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1. School of Materials Science and Engineering, Central South University, Changsha 410083, China;
2. CSSC Jiujiang Marine Equipment (Group) Co.,Ltd., Jiujiang 332008, China;
3. State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China

Received date: 2024-07-09

Revised date: 2024-09-17

Online published: 2024-11-18

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摘要

为探究铜-石墨复合材料在不同对偶材料下的载流摩擦磨损性能及相关机理,采用加压烧结法制备2种不同石墨含量的铜-石墨复合材料,并选用T2紫铜、QCr0.8铜锆合金和镀硬金的紫铜作为对偶材料进行载流摩擦磨损实验。通过扫描电镜、纳米压痕仪、表面轮廓仪和销盘摩擦磨损试验仪,对材料的微观结构、硬度和载流摩擦磨损性能进行研究。结果表明：与3种对偶材料对磨,铜-石墨材料的摩擦因数均在0.4~0.5之间,磨损率在10^-13 m³/(N·m)数量级,平均电压降在0.7~1.4 V之间,平均电噪声在0.2~0.7 mV之间。其中,QCr0.8铜锆合金作为对偶材料时,铜-石墨复合材料的载流摩擦磨损性能最佳,表现出最低的磨损率、电压降和电噪声,此时材料的磨损机制主要为剥层磨损和少量磨粒磨损,表面形成了由Pb、石墨和少量氧化物组成的润滑膜。

关键词： 摩擦配副; 摩擦磨损; 电传输; 铜基复合材料; 载流

本文引用格式

吴海红 , 王能慧 , 张礼松 , 叶佳钰 , 王传锋 , 涂有旺 , 康潇 . 对偶材料对铜-石墨复合材料载流摩擦磨损性能的影响[J]. 粉末冶金材料科学与工程, 2024 , 29(5) : 384 -395 . DOI: 10.19976/j.cnki.43-1448/TF.2024063

Abstract

To investigate the current-carrying friction and wear properties and underlying mechanisms of copper-graphite composites against different counterpart materials, two types of copper-graphite composites with varying graphite contents were prepared using the pressure sintering method. T2 copper, QCr0.8 copper-zirconium alloy, and hard gold-plated copper were selected as counterpart materials for current-carrying friction and wear tests. The microstructure, hardness, and friction and wear properties of the materials were examined using scanning electron microscopy, nanoindentation, surface profilometry, and pin-on-disk friction and wear test apparatus. The results show the average friction factors of the copper-graphite composites range between 0.4 and 0.5, the wear rates are on the order of 10^-13 m³/(N·m), the average voltage drop ranges from 0.7 V to 1.4 V, and the average electrical noise ranges from 0.2 mV to 0.7 mV when grinding with the three counterpart materials. Among these, the copper-graphite composite exhibits the best current-carrying friction and wear properties when paired with QCr0.8

Key words： friction pair; friction and wear; electrical transmission; copper-based composite; current-carrying

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