不同水介质润滑下GCr15钢的微动磨损特性  

Fretting Wear Behavior of GCr15 Steel under Lubrication of Various Aqueous Mediums

作　　者：任平弟[1] 陈光雄[2] 周仲荣[2] 

机构地区：[1]西南交通大学峨眉校区,四川峨眉614202 [2]西南交通大学摩擦学研究所,四川成都610031

出　　处：《摩擦学学报》2003年第4期331-335,共5页Tribology

基　　金：国家杰出青年基金资助项目(59725513).

摘　　要：采用液压高精度材料试验机考察了平面-球面接触GCr15钢摩擦副在海水、酸性水和洁净水等3种不同水介质润滑下的微动磨损性能.用激光扫描显微镜(LSM)观察了磨痕表面形貌.结果表明:3种水介质对钢-钢摩擦副具有明显的润滑作用,其中酸性水的润滑作用最明显;磨损体积损失同介质的润滑作用和腐蚀作用相关,在洁净水和海水介质润滑下的磨损体积损失较小,在酸性水介质润滑下的磨损体积损失较大;在海水润滑下的GCr15钢磨损表面呈现明显的点蚀特征.The fretting wear behavior of GCr15 steel (SAE52100) pair in a plane-on-ball configuration was examined on a universal material tester of highly accurate displacement control. The fretting wear tests were conducted at a normal force of 100 N, reciprocating sliding frequency of 2 Hz, and displacement amplitudes of 3 μm, 5 μm, 10 μm, 40 μm and 100 μm, using seawater, acid water, and tap water as the lubricating mediums. The fretting wear behavior of the steel under dry sliding was also examined as a control. The fretted surface morphologies of the steel were observed on a scanning electron microscope. It was found that seawater, acid water and tap water as the lubricating mediums showed distinct lubricating effect on the GCr15 steel fretting pair. The smallest friction coefficient was recorded under the lubrication of acidic water. but the wear volume loss registered in this case was ever larger than that under dry sliding. This was attributed to the corrosive action of the acidic water to the steel. The corrosive action of the aqueous mediums to the steel was confirmed by the corrosive pits on the fretted scar under the lubrication of acidic water and seawater. Further work is needed to differentiate the corrosive action of the acidic water from that of the seawater, though the two both have corrosive electrolytes of high concentration.

关 键 词：GCR15钢 水介质 微动磨损 

分 类 号：TH117.3[机械工程—机械设计及理论]