摩擦制动条件对列车制动闸片材料摩擦性能的影响  

Effect of friction conditions on friction properties of braking materials used for trains

作　　者：符蓉[1] 宋宝韫[1] 高飞[1] 运新兵[1] 

机构地区：[1]大连交通大学材料科学与工程学院,大连116028

出　　处：《中国有色金属学报》2008年第7期1223-1230,共8页The Chinese Journal of Nonferrous Metals

基　　金：国家高技术研究发展计划资助项目(2006AA03Z515);国家自然科学基金资助项目(50375025)

摘　　要：采用粉末冶金技术制备铜基陶瓷强化材料,通过定速摩擦实验机和1:1制动实验台测试了材料在多种摩擦条件下摩擦磨损性能的变化。结果表明:摩擦条件对摩擦磨损性能有明显影响,摩擦顺序、摩擦速度、摩擦压力的不同,造成摩擦表面温度不同;温度增高有利于形成连续致密的表面第三体,这种高温第三体组织对基体有良好保护,起到增加和稳定摩擦因数、降低磨损量的作用;定速摩擦顺序与惯性摩擦顺序在温升条件相似时,摩擦因数的变化具有相似性;在湿摩擦条件下,摩擦因数略有降低且稳定性好,原因在于水分对摩擦表面具有冷却及润滑作用;所研制材料摩擦因数的变化程度处于国际铁路联盟标准控制范围内。The friction and wear properties of particle-reinforced copper matrix composites fabricated by powder metallurgy, were measured by friction tester and 1：1 test bench, respectively. The results show that the friction conditions have strong effects on the friction properties of the materials in terms of different surface temperatures caused by various friction mode, friction speeds and braking pressures. Under high temperatures, the continuous and compact third bodies form easily on the surfaces, which protect the substrate, increase and stabilize the friction coefficient,and reduce the wear. The friction coefficient at constant speeds changes similarly to that at the inertial friction style, in case of similar temperature conditions. The friction coefficient of the present studied materials is low under wet condition, due to the fact that the moisture decreases the temperature of the surface and lubricates it as well. The friction coefficients of the materials are well within the scope ruled by the UIC Code.

关 键 词：铜基摩擦材料 闸片材料 第三体 摩擦性能 

分 类 号：TF125[冶金工程—粉末冶金]