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仿生多尺度沟槽织构对表面摩擦性能的影响
缪晨炜1,2, 郭智威1,2, 袁成清1,2
1. 武汉理工大学 能源与动力工程学院, 武汉 430063;2.
2. 国家水运安全工程技术研究中心 可靠性工程研究所, 武汉 430063
摘要:
仿生织构是仿照生物结构在摩擦副表面加工出特定尺度的纹理结构,以达到预期的表面性能,在工况恶劣的机械摩擦中拥有广阔的应用前景。参考蚯蚓头部多尺度沟槽织构,基于沟槽织构的基本结构参数深度、宽度、间距,在球墨铸铁和灰铸铁表面设计并激光加工多种梯度变化的沟槽织构,利用RTEC多功能摩擦磨损试验机中的销盘模块进行试验,从摩擦因数、磨损量、表面形貌、能量损耗、SEM、元素分布等方面分析其表面摩擦性能及机理。结果表明:同种织构应用于不同材料表面时,摩擦副的摩擦性能会呈现差异性,材料应作为设计织构参数时考虑的要素之一;沟槽织构的结构参数是影响表面抗磨损能力的主要因素之一;间距梯度沟槽织构相较于其它类型的多尺度沟槽织构,拥有最佳的表面性能,得益于其优秀的油膜形成、补充、稳定以及磨屑储存、冲刷能力。
关键词:  仿生  沟槽织构  多尺度  激光加工  能量损耗
DOI:10.11933/j.issn.1007-9289.20181010001
分类号:TG665
基金项目: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)
Effects of Bionic Multi-scales Groove Textures on Surface Tribological Properties
MIAO Chenwei1,2, GUO Zhiwei1,2, YUAN Chengqing1,2
1. School of Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China;2.
2. Reliability Engineering Institute, National Engineering Research Center for Water Transportation Safety, Wuhan 430063, China
Abstract:
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.
Key words:  bionic  groove texture  multi-scales  laser machining  energy loss