Page 76 - 《摩擦学学报》2021年第3期

第 41 卷 第 3 期 摩 擦 学 学 报 Vol 41 No 3
2021 年 5 月 Tribology May, 2021

DOI: 10.16078/j.tribology.2020084

转速对水环境下纯铜滚动载流摩擦

损伤的影响

1
2
2
2*
孙逸翔 , 宋晨飞 , 李家伟 , 张燕燕 , 张永振 1,2*
(1. 机械科学研究总院集团有限公司 武汉材料保护研究所有限公司，湖北 武汉 430030;
2. 河南科技大学 高端轴承摩擦学技术与应用国家地方联合工程实验室，河南 洛阳 471000)
摘 要: 使用滚动载流摩擦试验机研究了水环境下转速对纯铜滚动载流摩擦性能和表面损伤的影响. 转速从
30 r/min增至480 r/min，水下摩擦系数从1.06降低至0.49，且水下摩擦系数远高于干态摩擦系数；水下接触电阻从
0.57 Ω升高至6.4 Ω，且水下接触电阻比干态下更高. 分析可能的机制如下：低转速时水主要表现出毛细作用，导致
摩擦系数较高，材料表面发生明显的层片状剥落；高转速时水体现出部分润滑作用，摩擦系数降低，但“水压”作用
导致材料表面发生疲劳剥落. 不同转速下疲劳损伤形式转变是摩擦系数降低和水压作用增强竞争的结果. 本文试验
条件下表面损伤形式转变的临界转速在200~240 r/min之间. 载流摩擦表面发生了电化学氧化，但由于低转速表面剥
落严重，导致表面O: Cu原子个数比较低，接触电阻较低.
关键词: 载流摩擦; 水环境; 滚动; 接触电阻; 转速
中图分类号: TH117.1 文献标志码: A 文章编号: 1004-0595(2021)03–0365–08

Effect of Rotating Speed on Surface Damage of Rolling
Current-Carrying Pairs in a Water Environment

1 2* 2 2 1,2*
SUN Yixiang , SONG Chenfei , LI Jiawei , ZHANG Yanyan , ZHANG Yongzhen
(1. Wuhan Research Institute of Materials Protection, China Academy of Machinery Science and Technology
Group Co, Ltd, Hubei Wuhan 430030, China
2. National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and
Technology, Henan Luoyang 471000, China)
Abstract: The effect of rotating speed on the current-carrying properties and surface damage of pure copper rolling pairs
were investigated in a water environment. With the increasing of rotation speed from 30 r/min to 480 r/min, the friction
coefficient decreased from 1.06 to 0.49 in water environment, which was much higher than that of dry current-carrying
friction. And the underwater contact resistance increased from 0.57 Ω to 6.4 Ω, which was higher than that in dry rolling.
The possible mechanisms were as follows. At low speeds, the water mainly exhibited capillary action, resulting in a high
coefficient of friction and significant flaking on the surface of the material. While at high speeds, water exhibited partial
lubrication effect, the coefficient of friction decreased and pitting occurred on the surface because of the pressurization
effect. The evolution of the damage characters was based on the competition of the lubrication and pressurization of
water, and the critical rotation speed of such transition was 200~240 r/min. Electrochemical oxidation happened on the
current-carrying friction surface, but the atomic ratio of O to Cu was lower at lower speed due to the severe peeling, and
therefore the contact resistance was lower.

Received 15 May 2020, revised 13 August 2020, accepted 9 September 2020, available online 28 May 2021.
*Corresponding author. E-mail: cfsong@haust.edu.cn, Tel: +86-18338801692; E-mail: yzzhang@haust.edu.cn, Tel: +86-
13603961335.
The project was supported by the National Natural Science Foundation of China (U1804252, 51775173).
国家自然科学基金项目(U1804252, 51775173)资助.