摘要
以钴铬钼合金球头与钴铬钼平面试样作为摩擦副,分别在质量分数为25%的胎牛血清溶液和干态条件下进行了扭转复合微动磨损试验,探讨了该合金的微动磨损行为和损伤机理。结果表明:在血清溶液中摩擦副的界面比干态下的更易滑动;在部分滑移区,血清溶液和干态条件下的切向力与法向力比值都很小;在混合区,两种润滑条件下的接触界面均有明显的塑性变形;在滑移区,血清溶液的润滑作用显著,磨损机理为磨粒磨损和氧化磨损,而干态条件下除此以外还存在剥层现象;两种润滑条件下的微动界面都发生了摩擦氧化。
A friction pair of CoCrMo alloy ball and CoCrMo alloy flat was employed to conduct the dualrotary fretting （DRF） wear tests in bovine serum solution with mass fraction 25wt% and under dry condition, separately. The DRF wear behavior and damage characteristics of the alloy were discussed. The results show that, for the interface of friction pair, the slip occurred easily in serum solution than under dry condition. At partial slip region, Ft/Fn values were low in both lubrication conditions. At mixed region, obvious plastic deformation was found at contact inerface under two lubrication conditions. At slip region, the lubrication effect in serum solution was very obvious, and the wear mechanisms were abrasive and oxidation wear, however, the delamination occurred in dry state as well. Tribo-oxidation occurred at fretting interfaces under two lubrication conditions.
出处
《机械工程材料》
CAS
CSCD
北大核心
2014年第3期60-65,69,共7页
Materials For Mechanical Engineering
基金
国家自然科学基金资助项目(51025519
11172250)
中央高校基本科研业务费专项资金资助项目(SWJTU12ZT01)
教育部博士点基金资助项目(20100184120002)
