铝青铜-Ti_(3)AlC_(2)复合材料摩擦学性能与工程耐冲击性能研究  

Tribological Properties and Shock Resistances of Aluminum Bronze-Ti_(3)AlC_(2),Composites

作　　者：金孔杰 胡铮[1] 谈辉 王帅[3] 韩明[1] 田金山 乔竹辉[2] 杨军[2] JIN Kongjie;HU Zheng;TAN Hui;WANG Shuai;HAN Ming;TIAN Jinshan;QIAO Zhuhui;YANG Jun(China North Vehicle Research Institute,Beijing 100072,China;State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Gansu Lanzhou 730000,China;Nation United Engineering Laboratory for Advanced Bearing Tribology,Henan University of Science and Technology,Henan Luoyang 471023,China)

机构地区：[1]中国北方车辆研究所,北京100072 [2]中国科学院兰州化学物理研究所固体润滑国家重点实验室,甘肃兰州730000 [3]河南科技大学高端轴承摩擦学技术与应用国家地方联合工程实验室,河南洛阳471023

出　　处：《摩擦学学报(中英文)》2025年第1期35-45,共11页Tribology

摘　　要：针对铜基换挡摩擦片在极限工况下易发生强烈黏着磨损,继而导致烧蚀与磨损失效的问题,研制了铝青铜-Ti_(3)AlC_(2)复合材料及其工程样件.测试了样件在不同工况下的摩擦系数、磨损率、闭锁冲击系数、传递扭矩、耐振动冲击次数及耐热冲击系数,并分析了力学性能、磨损表面状态及摩擦磨损机理.结果表明:Ti_(3)AlC_(2)能够提高铝青铜基体的硬度和抗压强度,并减弱黏着磨损,从而提高复合材料的耐磨性能和耐热冲击性能;Ti3AlC2可使换挡摩擦片具备稳定的传递扭矩,并降低其在重载荷与高转速下的摩擦冲击;过量的Ti_(3)AlC_(2)会降低复合材料的组织均匀性和结合力,并对耐磨性能和耐振动冲击性能造成不利影响;通过优化Ti_(3)AlC_(2)含量可使复合材料兼顾良好的力学性能、摩擦学性能及耐冲击性能,进而提升换挡摩擦片在极限工况下对摩擦冲击、热冲击及振动冲击的承载能力.On account of the increasing power density and maneuvering characteristics of heavy vehicle,the speed change mechanism faces harsher working conditions.For example,on some vehicles the relative rotate speed of friction plate rise 32%,the pressure of friction plate rise 30%,and the time of sliding friction rise 60%.Under these conditions,friction plates require to possess excellent shock resistance,which avoid the ablation,severe wear and peel off of material.Meanwhile,it is important to adjust and control friction coefficient based on the inertia and shifting parameter of speed change mechanism.If the friction coefficient is too low,friction plate will skid during shifting.It resulted in the irregular change of vehicle speed and deficiency of power.However,if the friction coefficient is too high,the shifting shock will rise during shifting.It causes severe wear and decrease of service life.Therefore,in order to satisfy the needs of high maneuverability,the friction plate must have good tribological performance and shock resistance simultaneously.The using copper-based friction plate occurs violent adhesive wear,thermal failure and wears failure under utmost conditions because of the weak wear resistance and shock resistance.Hence,it is necessary to study new friction plate materials possessing good tribological performance,shock resistance and reliability.At present,the friction layer materials of friction plate mainly include powder metallurgy material,paper-based material,resinous material and ceramic material.The paper-based material and resinous material friction plates crack and fall off easily under high pressure,so they cannot be used on heavy vehicle.The ceramic material friction plate shows poor vibratory shock resistance,which resulted in the large thickness of friction plates.So it is difficult for ceramic material friction plate to install in transmission case.The friction coefficient of ceramic material decreases in water or oil environment,which leads to the reduction of friction plate transfer torq

关 键 词：铝青铜 钛铝碳复合材料 摩擦学性能 耐冲击性能 工程应用 

分 类 号：TH117.1[机械工程—机械设计及理论] TH142[一般工业技术—材料科学与工程]