飞秒激光加工YG6不同微织构表面浸润性研究  

Surface Wettability of Different Micro-Textured YG6 Processed by Femtosecond Lasers

作　　者：杨奇彪[1] 陈中培 杨涛[2] 张弘 娄德元[1] 刘顿[1] Yang Qibiao;Chen Zhongpei;Yang Tao;Zhang Hong;Lou Deyuan;Liu Dun(School of Mechanical Engineering,Hubei University of Technology,Wuhan,Hubei 430068,China;School of Naval Architecture and Navigation,Wuhan Technical College of Communications,Wuhan,Hubei 430068,China)

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068 [2]武汉交通职业学院船舶与航运学院,湖北武汉430068

出　　处：《激光与光电子学进展》2018年第9期269-274,共6页Laser & Optoelectronics Progress

基　　金：国家自然科学基金(51505135);国家科技支撑计划(2015BAF20B03);湖北省教育厅项目(B2016051);武汉青年科技项目(2016070204010123)

摘　　要：采用波长为800nm的飞秒激光在硬质合金YG6表面加工出微凹坑形貌,分别测量了微凹坑的形貌参数和表面接触角,从而获得最佳加工参数,分析了微凹坑形状、分布密度和单个面积对表面接触角的影响。基于Wenzel模型和Cassie模型的中间状态理论,分析了微凹坑形状对表面接触角的影响机理。结果表明:当平均功率低于200mW时,微凹坑表面形貌较好,微凹坑深度与扫描次数呈线性关系;微凹坑表面接触角随着微凹坑分布密度的增大而减小,随着单个微凹坑面积的增大而增大。不同形状微凹坑的浸润性优劣顺序依次为正三角形、正方形、正六边形、圆形。A femtosecond pulsed laser with wavelength of 800 nm is used to process micro-pits on the surface of cemented carbide YG6. The morphology parameters and surface contact angles of these micro-pits are measured to obtain the optimal processing parameters. The effects of micro-pit shape, distribution density and single micro-pit area on the surface contact angle are analyzed. Based on the middle state theory of Wenzel and Cassie models, the influence mechanism of micro-pit shape on surface contact angle is analyzed. The results show that the micro-pit surface morphology is relatively good and there exists a linear relationship between the micro-pit depth and number of scanning when the average power is lower than 200 mW. The micro-pit surface contact angle decreases with the increase of micro-pit density and increases with the increase of single micro-pit area. The shapes of micro-pits in the order of excellence of surface wettability are as follows ： regular triangle, regular square, regular hexagon and circle.

关 键 词：激光技术 浸润性 微织构 飞秒激光 硬质合金YG6 

分 类 号：TG665[金属学及工艺—金属切削加工及机床] TB383[一般工业技术—材料科学与工程]