铜基粉末冶金刹车闸片磨损形貌演变研究  

Study on Wear Morphology Evolution of Copper-based Powder Metallurgy Brake Pads

作　　者：申长慧 米雪 彭金方[1,2] 唐攀 杨文贤 方婧婷 黄银 朱旻昊 SHEN Changhui;MI Xue;PENG Jinfang;TANG Pan;YANG Wenxian;FANG Jingting;HUANG Yin;ZHU Minhao(Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu Sichuan 610031,China;School of Materials Science and Engineering,Southwest Jiaotong University,Chengdu Sichuan 610031,China;Science and Technology on Reactor System Design Technology Laboratory,Nuclear Power Institute of China,Chengdu Sichuan 610213,China)

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031 [2]西南交通大学材料科学与工程学院,四川成都610031 [3]中国核动力研究设计院核反应堆系统设计技术重点实验室,四川成都610213

出　　处：《润滑与密封》2023年第2期75-82,共8页Lubrication Engineering

基　　金：四川省科技计划项目(2019ZDZX0001)。

摘　　要：采用多功能销-盘摩擦磨损试验机,开展铜基粉末冶金/Q235-B摩擦副的摩擦磨损试验,在载流和无载流的工况下,研究接触压力(0.4、0.7、1.0和1.3 MPa)对铜基粉末冶金材料闸片磨损表面形貌的影响。结果表明:在无载流工况下,随着接触压力的增大,摩擦因数和磨损率均缓慢上升,试样表面损伤加剧,粗糙度升高,主要的损伤机制为磨粒磨损和剥层;在载流工况下,0.4 MPa时的摩擦因数和磨损率最大,损伤最严重,粗糙度最高,当接触压力增大到0.7 MPa后,表面形貌损伤的变化趋势与无载流工况一致,磨损机制在磨粒磨损和剥层的基础上增加了电弧烧蚀;载流工况下材料表面的粗糙度普遍高于无载流工况下,表面损伤更为严重。The friction and wear tests of Copper-based powder metallurgy/Q235-B friction pair were carried out by using a multifunctional pin disk friction and wear tester.The effects of contact pressure(0.4 MPa,0.7 MPa,1.0 MPa and 1.3 MPa)on the wear surface morphology of Copper-based powder metallurgy brake pads were studied under current carrying and no current carrying conditions.The results show that under no-current carrying condition,with the increase of contact pressure,the friction coefficient and wear rate increase slowly,the surface damage and roughness of the sample increase,and the main damage mechanisms are abrasive wear and delamination.Under the current carrying condition,the friction coefficient and wear rate are the largest,the damage is the most serious and the roughness is the highest at 0.4 MPa.When the contact pressure increases to 0.7 MPa,the change trend of surface morphology damage is consistent with that under no current carrying condition.In addition to abrasive wear and delamination,there is also arc ablation.The surface roughness under current carrying condition is generally higher than that under no current carrying condition,and the surface damage is more serious.

关 键 词：铜基粉末冶金材料 接触压力 载流磨损 磨损机制 电弧烧蚀 

分 类 号：TH117.1[机械工程—机械设计及理论]