非晶合金表面热压印微结构的摩擦性能研究  

Friction properties of amorphous alloy surface with hot-embossed textures

作　　者：李宁[1] 徐二江 柳林[1] 王新云[1] 李建军[1] LINing, XU Er-jiang, LIU Lin, WANG Xin-yun, LI Jian-jun(State Key Laboratory of Material Processing and Die ＆ Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室

出　　处：《塑性工程学报》2018年第5期24-32,共9页Journal of Plasticity Engineering

基　　金：国家自然科学基金资助项目(51671090);湖北省创新群体项目(2018CFA003)

摘　　要：利用过冷液态非晶合金的超塑性,在非晶合金表面热压印成形出具有不同几何尺寸的蜂窝状结构,并对其表面干、湿摩擦性能进行了系统研究。结果发现：在干摩擦及湿摩擦条件下,通过调控表面微结构的几何尺寸,均能降低摩擦系数。如在干摩擦条件下,摩擦系数从光滑平面的1. 07±0. 08降低到蜂窝状结构平面（蜂窝中心间距75. 5μm）的0. 43±0. 08,降幅达60%。但随蜂窝中心间距的进一步增大（75. 5～195μm）,摩擦系数又随之增大。相似的,在湿摩擦条件下,摩擦系数也随蜂窝中心间距的增大呈现先减小（降幅达46%）,后增大趋势。对上述现象,分别依据蜂窝中心间距对真实接触面积与接触应力的影响进行了深入分析。Honeycomb micro-textures with different geometries were hot-embossed on amorphous alloy surface by considering the superplasticity of supercooled liquid amorphous alloys,and the surface friction properties were systematically investigated under both dry friction and wet friction conditions. The intriguing finding is that the coefficient of friction can be reduced by adjusting the geometrical dimensions of the surface textures under both dry friction and wet friction conditions. Such as under dry friction,the friction coefficient decreases from1. 07 ± 0. 08 on the smooth surface to 0. 43 ± 0. 08 on the honeycomb surface（ 75. 5 μm pitch）,a reduction of 60%. However,the friction coefficient increases with the further increase of the honeycomb spacing（ 75. 5-195 μm）. Similarly,under wet friction condition,the friction coefficient also decreases first（ a reduction of 46%） with increasing the honeycomb spacing,and then increases. The above phenomenon is in-depth understood by considering the effect of honeycomb spacing on the real contact area and contact stress.

关 键 词：非晶合金 微成形 表面几何结构 摩擦 表面减磨 热压印 

分 类 号：TG306[金属学及工艺—金属压力加工]