干湿态下制动载荷对粉末冶金闸片材料摩擦学性能的影响  

Effect of contact pressure on tribological properties of powder metallurgy brake materials under dry and wet conditions

作　　者：肖叶龙 陈盛[1] 沈明学 姚萍屏 谢徐洲[3] 华李成 XIAO Yelong;CHEN Sheng;SHEN Mingxue;YAO Pingping;XIE Xuzhou;HUA Licheng(School of Materials Science and Engineering,East China Jiaotong University,Nanchang 330013,China;State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Jiangxi Huawu Brake Co.,Ltd.,Fengcheng 331100,China;Key Laboratory of Impact and Safety Engineering,Ministry of Education,Ningbo University,Ningbo 315211,China)

机构地区：[1]华东交通大学材料科学与工程学院,江西南昌330013 [2]中南大学粉末冶金国家重点实验室,湖南长沙410083 [3]江西华伍制动器股份有限公司,江西丰城331100 [4]宁波大学冲击与安全工程教育部重点实验室,浙江宁波315211

出　　处：《粉末冶金工业》2023年第2期17-23,50,共8页Powder Metallurgy Industry

基　　金：国家自然科学基金资助项目(52105184,52175209);江西省自然科学基金资助项目(20212BAB214010,20212ACB214003);国铁集团科技研发计划重点课题(N2021T012);江西省教育厅科学技术研究资助项目(GJJ200607);冲击与安全工程教育重点实验室(宁波大学)开放课题(CJ202108)。

摘　　要：采用粉末冶金技术制备了一种高速列车用铜基闸片材料,研究了干湿环境下制动载荷对铜基闸片材料摩擦学性能的影响,探究了闸片材料及其配对材料(铸钢材料)的磨损规律。结果表明:随着制动载荷的增加,干湿态下摩擦稳定系数均先减小后增加,平均摩擦因数不断降低,闸片材料的磨损率先快速增加后小幅减小,铸钢材料的磨损率先快速增加后缓慢增加。湿态环境可减轻低制动载荷下闸片材料的剥落程度及高制动载荷下材料的犁削,降低了摩擦因数及材料的磨损率。A copper matrix composite(Cu-MMC for short)for brake pads used to high-speed trains was made by powder metallurgy technology.The effect of contact pressure on tribological properties of Cu-MMC under wet and dry conditions was studied,and the wear laws of Cu-MMC and its dual material(namely cast steel)were investigated.The results indicate that the frictional stabilities increases at first and then decrease,average coefficients of friction decrease continuously,the wear rate of Cu-MMC increases significantly at first and then decreases slightly,and the wear rate of cast steel increases rapidly at first and then increases gradually with increasing contact pressure under dry and wet conditions.The delamination of Cu-MMC under low contact pressure and abrasive wear of Cu-MMC under high contact pressure are obviously alleviated in wet environment,resulting in low friction coefficient and wear rate.

关 键 词：粉末冶金 闸片材料 干湿环境 制动载荷 摩擦磨损 

分 类 号：U270.35[机械工程—车辆工程] TF125[交通运输工程—载运工具运用工程]