论文部分内容阅读
通过激光加工在锡青铜(ZQSn6.5-0.1)和轴承钢(GCr15)表面制备了微结构阵列,并进行低表面能处理,得到了2种金属双疏(疏水/疏油)表面.对制备的试样进行摩擦学性能实验研究,分别考察2种试样表面不同微结构形状、载荷及摩擦速度对其摩擦学性能的影响.结果表明:在相同润滑条件下,锡青铜和轴承钢双疏表面摩擦系数均比各自光滑试样表面低,最低分别为0.037和0.026;2种金属双疏表面具有圆形微凹坑阵列结构时,具有最优的减阻效果;载荷对试件摩擦系数的影响因材料特性不同而不同;随着速度的增加,不同图案密度微结构表面摩擦系数均呈现先减小后增大趋势,符合Stribeck曲线特性.
Microstructure arrays were prepared by laser machining on the surface of tin bronze (ZQSn6.5-0.1) and bearing steel (GCr15), and two metal sparse (hydrophobic / oleophobic) surfaces were obtained by low surface energy treatment. Were used to study the tribological properties of the samples.The effects of different microstructures, loadings and friction velocities on the tribological properties of the two samples were investigated.The results show that under the same lubrication conditions, The surface friction coefficient is lower than the surface of each smooth sample, the minimum is 0.037 and 0.026 respectively; When the two kinds of metal double sparse surface have the array structure of circular micro-pits, it has the best drag reduction effect; The friction coefficient The influence varies with the material characteristics. With the increase of velocity, the friction coefficient of the surface of microstructures with different pattern densities decreases first and then increases, which accords with the characteristic of Stribeck curve.