静态接触中表面纹理对塑性变形界面微凸体平坦化的影响

doi:10.3901/JME.2016.03.093

机械工程学报 ›› 2016, Vol. 52 ›› Issue (3): 93-100.doi: 10.3901/JME.2016.03.093

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静态接触中表面纹理对塑性变形界面微凸体平坦化的影响

胡兆稳, 刘焜, 刘小君, 王伟

合肥工业大学机械与汽车工程学院合肥 230009

收稿日期:2015-02-05 修回日期:2015-11-11 出版日期:2016-02-05 发布日期:2016-02-05
通讯作者: 胡兆稳，男，1972年出生，博士，副教授。主要研究方向为摩擦学和表面工程。 E-mail：huzhaowen1971@163.com
基金资助:
国家自然科学基金(51375132，51475135)和中央高校基本科研业务费专项资金(J2014HGBZ0114)资助项目

Effect of Surface Texture on Asperity Flattening at Plastic Deformed Interface in Static Contact State

HU Zhaowen, LIU Kun, LIU Xiaojun, WANG Wei

School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009

Received:2015-02-05 Revised:2015-11-11 Online:2016-02-05 Published:2016-02-05

摘要/Abstract

摘要： 试验研究了静态接触中表面纹理对塑性变形界面微凸体平坦化的影响。运用抛光技术制备了两种试件表面：单向纹理表面和各向同性表面。采用HDM-20端面摩擦试验机，分别在有、无润滑油条件下对试件进行了压缩试验。用JM-6200型光学显微镜观测试件表面形貌结构的变化；用Talysurf CCI Lite测量三维表面参数，并选取Sa、Sal、Str、Sdr和Sdq等参数来定量描述试件表面形貌结构的变化。结果表明，试件表面纹理对微凸体平坦化行为具有明显的影响，无润滑油时各向同性表面微凸体平坦化程度大于单向纹理表面，但有润滑油时刚好相反；表面纹理对微凸体平坦化的影响使得三维表面参数发生了规律性变化。基于机械流变模型的分析表明，封闭润滑油坑的出现导致了有润滑油时表面纹理影响微凸体平坦化行为。通过封闭润滑油坑特征的提取，验证了分析的正确性。

关键词: 表面形貌, 封闭润滑油坑, 微凸体平坦化, 纹理, 真实接触面积比

Abstract: The effect of surface texture on asperity flattening at plastic deformed interface in static contact state has been investigated experimentally. Two types of surfaces textures of specimens, isotropic surface and solely directional surface, are obtained by polishing. A series of compression tests are carried out with lubricant and without lubricant respectively using HDM-20 End-Face Tribometer. The three dimensional surface topography of the specimens are observed by means of JM-6200 optical microscope. The three dimensional surface parameters are measured with Talysurf CCI Lite. The variations of surface microstructure are analyzed by choosing such parameters as Sa, Sal, Str, Sdr and Sdq. The experimental results show that the surface texture of specimens has a significant effect on asperity flattening. The isotropic surface exhibits a higher rate of asperity flattening than the solely directional surface without lubricant, while an opposite situation occurs with lubricant. The effect of surface texture on asperity flattening leads to regular changes of the three dimensional surface parameters. Based on mechanical-rheological model, it comes to a conclusion that the effect of surface texture on asperity flattening with lubricant can be attributed to the presence of closed lubricant pockets, which is validated by the extraction of the closed lubricant pocket features.

Key words: asperity flattening, closed lubricant pocket, real contact area ratio, surface topography, texture

中图分类号:

TH117

胡兆稳, 刘焜, 刘小君, 王伟. 静态接触中表面纹理对塑性变形界面微凸体平坦化的影响[J]. 机械工程学报, 2016, 52(3): 93-100.

HU Zhaowen, LIU Kun, LIU Xiaojun, WANG Wei. Effect of Surface Texture on Asperity Flattening at Plastic Deformed Interface in Static Contact State[J]. Journal of Mechanical Engineering, 2016, 52(3): 93-100.

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静态接触中表面纹理对塑性变形界面微凸体平坦化的影响

Effect of Surface Texture on Asperity Flattening at Plastic Deformed Interface in Static Contact State

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