预热处理对超高分子量聚乙烯摩擦磨损性能的影响  

Effects of Preheat Treatment on the Friction and Wear Properties of Ultra High Molecular Weight Polyethylene

作　　者：雷毅[1] 郭建良[1] 

机构地区：[1]中国石油大学机电工程学院,山东东营257061

出　　处：《润滑与密封》2007年第8期12-15,共4页Lubrication Engineering

基　　金：中国石油天然气集团公司石油科技中青年创新基金资助项目(W020311);中国石油大学(华东)创新基金资助项目(S2005-64)

摘　　要：利用销-盘式摩擦磨损试验机考察了预热处理温度和时间对超高分子量聚乙烯（UHMWPE）材料摩擦磨损性能的影响,借助扫描电子显微镜观察了试样磨损表面形貌.结果表明：通过140 ℃、10～15 min的预热处理工艺可以显著改善UHMWPE材料的摩擦磨损性能.随着预热处理工艺参数的改变,UHMWPE材料的磨损机制也发生不同程度的变化,开始未进行预热处理时UHMWPE材料的磨损机制主要表现为粘着磨损和疲劳磨损特征,随着预热处理温度的提高和时间的延长,其磨损机制逐渐变为粘着磨损占主导地位,最终又转变为粘着磨损和疲劳磨损相互作用,局部磨损表面呈现了严重的塑性变形特征.The influences of preheat treatment temperature and time on the friction and wear behavior of ultra high molecular weight polyethylene （UHMWPE） were investigated on a pin-on-disc test rig. The worn surfaces were observed on a scanning electron microscope. It is found that the friction and wear properties of preheat-treated UHMWPE for 10 - 15 minutes by 140 ℃ are improved remarkably. The wear mechanisms of preheat-treated UHMWPE occur the change in varying degrees when preheat treatment temperature and time are changed. For UHMUPE which is not heat-treated, the main wear mechanisms are adhesive wear and fatigue wear. With the increase of temperature and the time of preheat treatment, adhesive wear becomes the main mechanism gradually. In the end the wear mechanisms turn back to adhesive wear and fatigue wear, and severe plastic deformation appears on local worn surface.

关 键 词：超高分子量聚乙烯(UHMWPE) 预热处理 摩擦磨损性能 磨损机制 

分 类 号：TH87[机械工程—仪器科学与技术]