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中南大学学报(英文版)

Journal of Central South University

Vol. 24    No. 2    February 2017

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Friction properties of groove texture on Cr12MoV surface
WANG Jing(王敬)1, 2, ZHOU Jie(周杰)1, ZHU Shan-shan(朱姗姗)1, ZHANG Jian-sheng(张建生)1

1. School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China;
2. Department of Automotive Engineering, Chongqing Technology and Business Institute, Chongqing 400052, China

Abstract:To analyze the influence of surface texture on friction properties of Cr12MoV’, ordinary grinder and spinning technology were adopted to obtain the grooved surface morphology of samples, and then the impact of spindle speed and feed in z-direction on surface morphology in the process of spinning was studied. In addition, the corresponding friction coefficient of sample was obtained through friction and wear tests. The results show that the peak clipping and the valley filling were conducted on the grinding surface, which could improve the surface roughness effectively and make the grinding trench-type wear scar more uniform. Both the area ratio of groove and groove spacing increased initially and then decreased with the increase of the spindle speed or the feed in z-direction. As a kind of micro-process, the groove could influence the friction coefficient of sample surface, whose distribution was beneficial to the reduction of friction coefficient. Compared with the surface obtained through ordinary grinding, grooved surface morphology through spinning technology was more conductive to reduce the friction coefficient, which could be reduced by 25%. When the friction coefficient of sample was reduced to the minimum, the texture of groove corresponded had an optimal area ratio and an optimal groove spacing, 37.5% and 27.5 μm, respectively.

 

Key words: groove texture; spinning; friction coefficient; area ratio; groove spacing

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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