动车组表面聚氨酯涂层冲蚀性能分析  

Erosion Performance of Polyurethane Coatings on Motor Train Unit Surface

作　　者：刘仁[1,2] 张世欣[3] 王小成[3] 高方圆[1] 武传田[3] 李光[1] 

机构地区：[1]中国科学院力学研究所,北京100190 [2]中材科技风电叶片股份有限公司,北京102101 [3]南车青岛四方机车车辆股份有限公司,山东青岛260000

出　　处：《机械工程师》2015年第12期60-62,共3页Mechanical Engineer

摘　　要：采用气流喷砂式冲蚀实验机,对动车组聚氨酯涂层进行冲蚀性能研究。利用扫描电子显微镜及表面轮廓测量仪,检测了聚氨酯涂层的表面冲蚀形貌及冲蚀磨损,比较分析了粒子速度、入射角度对聚氨酯涂层冲蚀磨损率及冲蚀形貌的影响规律。研究发现:聚氨酯涂层冲蚀磨损机制为低角度冲蚀时微切削机制起主导作用,高角度冲蚀时脆性破碎机制起主导作用;冲蚀参数对涂层的冲蚀磨损率影响规律为:随粒子速度呈现指数增长(指数为2.27),随入射角度先增后减规律(峰值在30°入射时)。By using air-blast erosion test machine, the erosion experiments of polyurethane coatings on motor train unit surface are carried out. Scanning electron microscopy and surface profile measuring instrument are used to study the morphology of surface and erosion wear of polyurethane coatings. The effects of particle velocity and incident angle on the erosion rate and the erosion morphology are comparatively analyzed. The results show that erosion wear mechanism is micro cutting mechanism for low angle erosion and brittle broken mechanism for high angle erosion. The impact of erosive parameters on law of erosion rate is shown. The erosion rate of polyurethane coating exponential grew with erosion velocity while the index is 2.27, and the erosion rate increases and then decreases with impacting angle while the peak value appears in 30°.

关 键 词：聚氨酯涂层 冲蚀 冲蚀参数 冲蚀机制 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]