弹子加压机构涂层密封材料性能研究  

Research on the Coating Material of Ball Pressurizing Mechanism

作　　者：杨玲玲[1] 兰海[1] 徐宜[1] 宁克焱[1] 

机构地区：[1]中国北方车辆研究所,北京100072

出　　处：《车辆与动力技术》2015年第3期30-34,共5页Vehicle & Power Technology

摘　　要：针对弹子加压机构密封配合柱面使用环境恶劣、密封不良或锈蚀导致弹子盘运动卡滞的问题,研究了镍包石墨和镍包二硫化钼两种涂层密封材料性能,通过氧-乙炔火焰喷涂方法制备了涂层试样,通过金相显微镜、显微硬度计对涂层微观形貌和硬度进行了检测;采用拉伸试验法研究了涂层结合强度;采用斜坡法和拖磨法分别研究了涂层静摩擦系数和动摩擦系数.结果表明:镍包二硫化钼涂层和镍包石墨涂层金相组织均匀,镍包二硫化钼涂层与镍包石墨涂层相比显微硬度高了26.2%、结合强度高了4%、动摩擦片系数低了11%,为弹子加压机构配合柱面密封材料选择提供了依据.There are many problems pertaining to the matching cylinder in the ball pressurizing mechanism, such as the adverse effects caused by harsh environment, poor seal or corrosion, which may block the ball＇s movement. In this paper, two kinds of coating material which are Ni-graphite and Ni- molybdenum were researched, the coating samples were prepared by oxygen-acety-lene flame; micro- morphology, micro-hardness and bonding strength were detected througth microscope, micro-sclerometer and tensile test method. The static coefficient and kinetic friction coefficient were tested by slope method and drag grinding method. The results show that the micro-morphology of each coating is uniform. Comparing with Ni-graphite coating, the micro-hardness bonding and strength of Ni-molybdenum coating increased by 26. 2% and 4%, respectively and the kinetic friction coefficient is lower by 11%. This provides more choice for the ball pressurizing mechanism.

关 键 词：氧-乙炔火焰喷涂 镍包石墨 镍包二硫化钼 密封 摩擦系数 

分 类 号：U463.512[机械工程—车辆工程]