高速摆动条件下PTFE编织复合材料干摩擦热行为研究  

Study on Friction Thermal Behavior of PTFE Braided Composites Under High-speed Oscillating Conditions

作　　者：康克家[1] 杜三明[1] 张永振[1] 赵飞[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《材料工程》2011年第11期15-17,22,共4页Journal of Materials Engineering

基　　金：国家自然科学基金(50975078);973计划前期研究专项(2010CB635113);国家重点联合基金(U1034002)

摘　　要：利用自制高速摩擦实验机,以聚四氟乙烯(PTFE)编织复合材料为研究对象,与不锈钢9Cr18Mo配副,进行高速摆动下的干摩擦实验,研究摩擦热的影响因素及变化规律;利用扫描电子显微镜对摩擦表面进行观察,分析其磨损机制。结果表明:摩擦温度随载荷增加而升高,在摩擦初期摩擦温度随频率增加而降低,之后又随频率增加而升高,并最终达到动态平衡;摩擦因数随时间的增加先急剧降低后小范围缓慢回升,最终保持相对稳定,且与摩擦温度有一定的对应关系;磨损机制以剥落与黏着磨损为主,温度是影响摩擦过程与磨损机制的重要因素。The dry friction test of polytetrafluoroethene（PTFE） braided composites under high-speed Oscillating conditions has been carried out on the special high-speed tribo machine and 9Cr18Mo as counterpart,the influences and the variation rules of friction heat has been studied.Results show that friction temperature increases with the increasing of load;and the temperature decreases with increases in frequency of short duration in the initial friction stage,later increases with increased frequency,and finally reach temperature dynamic balance;the friction coefficient rises slowly in small range before a sharply reduces with the increase in time,ultimately,it maintains a relatively stable state,and has certain corresponding relationship with friction temperature;The main abrasion mechanism of friction pair is adhesive wear,and temperature is an important factor that influences friction process and the wear mechanism.

关 键 词：PTFE 编织复合材料 干摩擦 摩擦热 

分 类 号：TH117[机械工程—机械设计及理论]