聚四氟乙烯编织复合材料摩擦温度与磨损特性

PTFE

聚四氟乙烯编织复合材料摩擦温度与磨损特性

刘建[1] 张永振[1,2] 杜三明[2] 路红艳[1] 刘敬超[2][1]西北工业大学机电工程学院,西安710072 [2]河南科技大学材料摩擦学重点实验室,洛阳471003

摘　要:在高频压摆摩擦磨损试验机上对自制聚四氟乙烯（Polytetrafluoroethene,PTFE）编织复合材料进行摩擦学性能试验,研究摩擦温度与摩擦磨损特性的关系。试验结果表明：摩擦温度对PTFE编织复合材料的摩擦因数影响显著,摩擦温度在30～60℃范围内升高,摩擦因数有明显的降低趋势,在65～210℃范围内摩擦因数处于稳定阶段,210℃是摩擦因数的突变摩擦温度。通过扫描电子显微镜对不同工况下产生的磨屑进行显微分析表明：高温下产生的磨屑与低温下的磨屑明显不同,低温下产生的磨屑为细小的片状,高温下产生的磨屑以大片的断裂纤维为主,材料磨损严重。PTFE编织复合材料的耐磨性受摩擦温度影响较大,200℃是PTFE编织复合材料磨损率的转折点。为保证该PTFE编织复合材料良好的摩擦磨损性能,摩擦温度动态监测值不能超过200℃。[著者文摘]

关键词:关节轴承 聚四氟乙烯 摩擦温度 磨损 摩擦因数
分类号:　TH117[著者标引]文献标识码：文章编号：栏目信息：摩擦学
相关文献:主题相关

Temperature and Friction Characteristics of PTFE Braided CompositesLIU Jian, ZHANG Yongzhen, DU Sanming, LU Hongyan, LIU Jingchao 1. School of Mechatronic, Northwestern Polytechnical University, Xi＇an 710072; 2. Key Laboratory of Material Tribology, Henan University of Science and Technology, Luoyang 471003Abstract:Measuring polytetrafluoroethene（PTFE） fabric composites friction and wear performance with the change of the temperature trend are carried out on high-speed tribo-tester to analysis of the temperature on the influence of friction and wear performance. The results show that friction coefficient have significantly reduced trend from 30 ℃ temperature began to rise. Between 65-210℃, friction coefficient is in stable stage. When the temperature reaches 210 ℃, friction coefficient is beginning to rise as the temperature rising. Through the SEM photographs of the wear debris analyzed suggests that wear debris components in the main is large fiber in high temperature, while low temperature conditions, wear debris mainly is the tiny particles. The wear obviously effect by temperature, temperature over 200 ℃, when a sharp increase of PTFE fabric composites wear. To ensure the stability of PTFE fabric composites friction and wear performance, 200℃ is the limit temperature of dynamic monitoring friction temperature.[著者文摘]

Key words:Spherical plain bearing TFE; Friction temperature; Wear; Friction coefficient

收稿日期:　2012-05-17修订日期:　2012-10-10基金资助:国家重点基础研究发展计划（973计划,2010CB635113）、摩擦学国家重点实验室开放基金（SKLTKF11B10）和国家自然科学基金（U1034-002）资助项目.
作者简介:刘建，男，1985年出生，博士研究生。主要研究方向为材料干摩擦学。E-mail：1iuj1795ddd@163．com 张永振（通信作者），男，1963年出生，教授，博士研究生导师。主要研究方向为材料干摩擦学。E-mail：yzzhang@mail．haust．edu．cn