Effect of Slip-Roll Ratio on the Current-Carrying Tribology Performance of Cu/Cu Rolling Pairs
ZENG Zexiang1, SONG Chenfei1,*, WU Haihong2, LYU Bin2, SUN Chao1, PANG Xianjuan1, ZHANG Yongzhen1
1 National United Engineering Laboratory for Advanced Bearing Tribology, Henan University of Science and Technology, Luoyang 471023, Henan, China 2 CSSC Jiujiang Jingda Techology Co., Ltd., Jiujiang 332000, Jiangxi, China
Abstract: Slip-roll ratio was an important factor affecting the rolling contact. In this work, current-carrying tribology performance of Cu/Cu rolling pairs were studied under different slip-roll conditions. With the increase of slip-roll ratio, the average current-carrying friction coefficient increased, the contact resistance decreased first and then remained stable, and the width of wear mark increased. As a comparison, the mechanical friction coefficient at the same slip-roll ratio without current changed in the similar trends but the value was lower. The increase of slip-roll ratio promoted the fatigue wear, and the degree of surface oxidation decreased due to the fatigue spalling of material. The slip-roll led to obvious plastic deformation of subsurface layer. By comparing the results with and without current, it was found that the current aggravated surface fatigue and plastic deformation of the subsurface which may be related to the Joule heating-induced material weakening. The slip-roll could enhance the electrical conductivity but cause drastic fatigue damage, and the participation of current promoted the material damage. How to control the slip-roll ratio is a key challenge for future design of rolling conductive rotary joints.
曾泽祥, 宋晨飞, 吴海红, 吕斌, 孙超, 逄显娟, 张永振. 滑滚比对Cu/Cu对滚配副载流摩擦性能的影响[J]. 材料导报, 2023, 37(21): 22040041-6.
ZENG Zexiang, SONG Chenfei, WU Haihong, LYU Bin, SUN Chao, PANG Xianjuan, ZHANG Yongzhen. Effect of Slip-Roll Ratio on the Current-Carrying Tribology Performance of Cu/Cu Rolling Pairs. Materials Reports, 2023, 37(21): 22040041-6.
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2023, Vol. 37 
