油、水介质对GCr15钢微动磨损特性的影响

Influence of Oil and Water Mediums on Characteristics of Fretting Wear of 52100 Steel

采用PLINT高精度液压伺服式微动磨损试验机,在法向载荷100N、频率2Hz、位移幅值1 5～60μm,以及大气、纯净水和液压油3种不同介质条件下,对GCr15钢进行了微动磨损试验.动力学分析结合光学显微镜和激光共焦扫描显微镜(LCSM)的微观观察结果显示:流体介质对微动运行区域有轻微改变;液压油和纯净水介质明显降低了微动摩擦因数、磨痕深度和磨斑尺寸,表现出明显的润滑作用,而液压油的润滑效果明显优于纯净水 微观分析表明,3种介质条件下的微动磨损是磨粒磨损和剥层机制共同作用的结果.

The fretting wear tests of 52100 steel under three different mediums of air, hydraulic oil, and tap water were carried out on a hydraulic FLINT fretting test machine with high precision. All tests were examined under the conditions of 100 N normal load, 2 Hz frequency, and the displacement amplitude varying in the range 1.5 to 60 micrometers. Combined with microscopic observations by optical microscopy and laser confocal scanning microscopy (LCSM), the dynamic analysis was performed. The test results show that the fretting regimes only slightly vary with the fluid mediums. And with the mediums of hydraulic oil and tap water, the friction coefficients of fretting tests, the depth and sizes of fretting scars are lowered obviously, and a more remarkable lubrication effect in hydraulic oil can be observed than in tap water. The microscopic analysis indicates that the fretting wear results from the combined actions of abrasion and delamination under the above mentioned conditions.