Ren Pingdi,Zhu Minhao,Zhou Zhongrong
(The key Laboratory on Advanced Material Technology of Education Ministry, Southwest Jiaotong University,Chengdu 610031,China)
Abstract:The fretting wear tests of 52100 steel under three different mediums of air,hydraulic oil,and tap water were carried out on a hydraulic PLINT 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, 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.
Keywords:fretting wear;lubrication;52100 steel