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《China Surface Engineering》 2019-01
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Effects of Bionic Multi-scales Groove Textures on Surface Tribological Properties

MIAO Chenwei;GUO Zhiwei;YUAN Chengqing;School of Energy and Power Engineering, Wuhan University of Technology;Reliability Engineering Institute, National Engineering Research Center for Water Transportation Safety;  
Bionic texturing is to produce a specific texture type on the surface of friction pairs based on biomimetic principle,to achieve expected surface properties. It has wide spread application prospects in mechanical friction under the harsh working conditions. Referring to the multi-scales groove textures of the earthworm head, the groove textures with different gradients were designed and manufactured by laser machining on the surface of ductile cast iron and gray cast iron, based on the basic structural parameters of groove textures: depth, width and interval. The experiment was carried out on the pin-plate module of the RTEC multi-functional friction and wear tester. The surface properties and function mechanisms were analyzed on the aspects of friction coefficient, wear volume, surface morphology, energy loss, SEM and element distribution. The experimental results show that the friction properties of the friction pair appear differences when the same texture is applied to different material surfaces. Material should be considered as one of the factors in designing texture parameters. The structural parameter of groove textures is one of the main elements that affects the wear resistance of the surface. The interval gradient groove texture has the better surface properties than other types of multi-scales groove textures due to its excellent ability of oil film formation, replenishment, stability and debris storage and scour.
【Fund】: 湖北省自然科学基金(2018CFB483);; 武汉理工大学研究生优秀学位论文培育项目(2018-YS-041)~~
【CateGory Index】: TG665
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