超音速火焰喷涂锡青铜-钢基双金属材料摩擦性能

摘要

The tin bronze alloy coating was formed by HVOF spraying method on Q235 steel. The friction and wear properties of tin bronze alloy coating were tested under different conditions. The wear morphology and wear mechanism were analyzed with help of SEM. The results show that under anti-wear hydraulic oil lubrication condition, the friction coefficient of the coating is the lowest ,which is 0. 093 ;under 30# lubricating oil, Paraffin or MoS2 powder lubrication condition, the friction coefficients are 0. 099、0. 107 and 0. 099 ,respectively. With the decrease of surface roughness,or with the increase of friction load,the friction coefficient of spraying tin bronze-steel base coating decreases. Under different lubricant conditions, there are abrasive wear, adhesive wear and fatigue wear, and the wear mechanisms are coordinating role.%采用超音速火焰喷涂QWFSn8Zn3粉末制备钢背双金属材料.研究不同润滑介质、不同表面粗糙度和不同摩擦载荷对超音速喷涂锡青铜-钢基涂层摩擦性能的影响.分析锡青铜涂层的磨损形貌和磨损机制.研究结果表明:抗磨液压油润滑条件下,涂层有最小的摩擦因数0.093,30#润滑油、液体石蜡和固体MoS2润滑下涂层摩擦因数分别为0.099、0.107和0.099;随表面粗糙度减小,喷涂锡青铜-钢基涂层摩擦因数逐渐减小;随着摩擦载荷的增加,喷涂层摩擦因数逐渐减小;不同润滑介质条件下,涂层存在磨粒磨损、黏着磨损和疲劳磨损共同作用的磨损机制.