采用旋转摩擦磨损试验机(MXW-05型)考察了聚四氟乙烯/凯夫拉(PTFE/Kevlar)织物材料在不同载荷旋转滑动条件下的摩擦磨损性能;利用体视显微镜、三维光学轮廓仪、场发射扫描电子显微镜以及能谱仪对织物磨痕进行了宏观和微观分析。结果表明:PTFE/Kevlar织物材料的摩擦因数随着载荷的增加呈现出先降低后升高的趋势,载荷为2N时材料的摩擦因数最低,载荷为10N时材料的摩擦因数最高;随着载荷的增加,织物材料与GCr15轴承钢之间的摩擦行为表现为PTFE转移膜的不断产生、剥落和再生,但其损伤的特征并不完全相同;织物材料的磨损机理主要为疲劳磨损、磨粒磨损与一定程度的氧化磨损。
The friction and wear properties of polytetrafluoroethylene/Kevlar (PTFE/Kevlar) fabric under different loading conditions were investigated by using MXW-05 rotating friction and wear tester.A stereo microscope,a three-dimensional optical profiler,a field emission scanning electron microscope,and an energy dispersive spectrometer were used to conduct macro- and micro-analysis on the fabric's wear scar.The results indicated that the friction coefficient of the PTFE/Kevlar decreased firstly and then increased with the increase of load.The friction coefficient of PTFE/Kevlar was the lowest when the load was 2N,and the highest when the load was 10N.With the increase of load,the friction behavior between the fabric material and GCr15 bearing steel was characterized by the continuous generation,peeling and regeneration of PTFE transfer film,but the damage characteristics were not completely the same.The wear mechanism of fabric consisted of fatigue wear,abrasive wear and some oxidation wear.
[1] 杨育林,祖大磊,黄世军.自润滑关节轴承现状及发展[J].轴承,2009(1):58-61,65.
[2] 李志迎,姜兆辉,孙航,等.PTFE复合材料的研究进展[J].化工新型材料,2016,44(9):7-9.
[3] 何长昭,王文东,邹华.耐高温聚合物基自润滑轴承材料的摩擦学研究进展[J].化工新型材料,2020,48(5):37-41.
[4] 刘建,张永振,杜三明,等.PTFE编织复合材料摩擦特性研究[J].材料工程,2012(8):69-72.
[5] 王国锋,邱明,郜志伦.PTFE/铜网衬垫关节轴承的摩擦学性能研究[J].轴承,2010(7):39-42.
[6] 卢建军,邱明,李迎春.自润滑向心关节轴承磨损寿命模型[J].机械工程学报,2015,51(11):56-63.
[7] 李迎春,邱明,苗艳伟.PTFE/芳纶纤维编织衬垫自润滑关节轴承的黏接性能及摩擦学性能[J].中国机械工程,2016,27(2):222-229.
[8] Wang H,Qi X W,Zhang W L,et al.Tribological properties of PTFE/Kevlar fabric composites under heavy loading[J].Tribology International,2020,151:106507.
[9] 周先辉,孙友松,王万顺.CF/PTFE纤维混编织物增强环氧复合材料干摩擦特性[J].摩擦学学报,2016,36(5):650-658.
[10] Cao J,Yin Z,Cui Y,et al.Design and analysis of a self-lubricating nuclear joint bearing above 320℃[J].Industrial Lubrication and Tribology,2017,69(2):95-104.
[11] 邱明,周大威,庞晓旭.织物衬垫编织艺对自润滑关节轴承摩擦学性能的影响[J].兵工学报,2017,38(9):1867-1872.
[12] 李佩隆,郭芳,姜葳,等.高承载下自润滑纤维织物复合材料摩擦磨损性能[J].润滑与密封,2016,41(3):1-4.
[13] Gao G,Gong J,Qi Y,et al.Tribological behavior of PTFE composites filled with PEEK and nano-ZrO2[J].Tribology Transactions,2020,63(2):296-304.
[14] Liu Y,Xu N,Wang Y,et al.Preparation and tribological properties of hybrid PTFE/Kevlar fabric self-lubricating composites[J].Surface and Coatings Technology,2018,361:196-205.
[15] Li H L,Yin Z W,Dan J,et al.Tribological behavior of hybrid PTFE/Kevlar fabric composites with nano-Si3N4 and submicron size WS2 fillers[J].Polymer Composites,2014,80(7):172-178.
[16] 丁建华,王亚强,张光宇,等.基体树脂和纳米颗粒含量对自润滑衬垫摩擦磨损性能的影响[J].轴承,2011(6):18-21.
[17] 刘沛.高性能织物增强聚四氟乙烯复合材料摩擦学性能研究[D].上海:复旦大学,2013.
[18] Khedkar J,Negulescu I,Meletis E I.Sliding wear behavior of PTFE composites[J].Wear,2002,252(5-6):361-369.
[19] Qi X,Hai W,Yu D,et al.Experimental analysis of the effects of laser surface texturing on tribological properties of PTFE/Kevlar fabric composite weave structures[J].Tribology International,2019,135:104-111.
[20] 刘建.PTFE填充KEVLAR纤维编织复合材料摩擦学性能研究[D].西安:西北工业大学,2016.
基金资助
国家自然科学基金(52105132);四川省应用基础研究项目(2020YJ0192、2021YJ0537、2019YJ0395);中国民用航空飞行学院面上项目(J2020-039、J2021-044)
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