摘要
采用湿法成型辅助热压工艺制备了纸基摩擦材料.分别考察了纸基摩擦材料在无油状态和富油状态下与不同碳含量钢配副材料的摩擦适配性,并通过磨损表面形貌分析和探讨了其在无油状态下的失效机理.结果表明:在无油状态下,随配副材料硬度增高,纸基摩擦材料的摩擦系数下降,摩擦稳定性提升,磨损率降低,高硬度的65Mn钢与纸基摩擦材料的适配性较好.纸基摩擦材料在无油状态下主要表现为由疲劳裂纹引发的纤维脱粘与拔出导致的材料失效.在富油状态下,配副材料的硬度对纸基摩擦材料的摩擦性能无显著影响,润滑油膜和摩擦膜的形成能有效减轻对配副材料的微观切削作用,从而抑制材料的磨损.
Paper-based friction material was prepared by wet-forming assisted hot-pressing process.The compatibility of steel pairs with different carbon contents and paper-based friction materials in oil-free state and oil-rich state was investigated,respectively.The friction mechanism in oil-free and oil-rich state was also discussed through wear surface analysis.Results showed that in the oil-free state,as the hardness of the matching material increased,the friction coefficient of the paper-based friction material decreased,the friction stability increased,and the wear rate decreased.The 65 Mn steel with high hardness had better compatibility with paper-based friction materials.The failure mode of paper-based friction material in the oil-free state was fiber debonding and pulling-out caused by fatigue cracks.In the oil-rich state,the hardness of the steel had no significant effect on the tribological properties of the paper-based friction material.The formation of oil film and friction film effectively reduced the micro-cutting effect on the material,and hereby reduced the wear of the material.
作者
孙涛
樊恒中
苏云峰
宋俊杰
付业伟
张永胜
胡丽天
SUN Tao;FAN Hengzhong;SU Yunfeng;SONG Junjie;FU Yewei;ZHANG Yongsheng;HU Litian(State Key Laboratory of Solidification Processing,Center of Advanced Lubrication and Seal Materials,Northwestern Polytechnical University,Shaanxi Xi'an 710072,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China)
出处
《摩擦学学报》
EI
CAS
CSCD
北大核心
2020年第4期477-488,共12页
Tribology
基金
国家重点研发计划项目(2017YFB0308300)
国家自然科学基金项目(51902317)
中国科学院青年创新促进会人才专项(2013272)资助。
关键词
纸基摩擦材料
润滑状态
配副硬度
摩擦学性能
摩擦机理
paper-based friction material
lubricating state
hardness of the matching material
tribological properties
friction mechanism
