摘要
采用粒度>550μm的天然鳞片石墨和人造石墨配合制备了铜基粉末冶金高速列车制动闸片材料,系统研究了鳞片石墨粒度对材料力学性能、摩擦磨损性能和摩擦膜形成的影响。结果表明:采用粒度>550μm的天然鳞片石墨作润滑组元,所制备摩擦材料的抗压强度显著高于采用小粒度石墨所制材料,达到145.30MPa;随鳞片石墨粒度的增大,材料的摩擦系数降低,磨损率降低幅度可达50%以上,摩擦表面趋于形成完整的摩擦膜;采用鳞片石墨和人造石墨配合使用,能够显著提高材料强度。
Copper-based brake pads friction materials containing nature flake graphite with average particle size over 550μm and synthetic graphite were prepared using powder metallurgy method. The effects of flake graphite particle size on mechanical properties and friction performance such as friction coefficient, wear rate and friction film formation were studied. The results show that the specimen contained flake graphite with average particle size over 550μm has the highest compression strength of 145.30MPa. The friction coefficient and wear rate of the composite decrease with the increasing flake graphite particle size. The worn surface of the composite tends to form a stable lubricant layer, resulting in an improvement in the wear resistance of the composite. Using both flake graphite and synthetic graphite leads to a significant strength improvement.
出处
《粉末冶金技术》
CAS
CSCD
北大核心
2012年第6期432-439,共8页
Powder Metallurgy Technology
基金
"十一五"国家科技支撑计划资助项目(2009BAG12A07)
关键词
铜基制动闸片材料
鳞片石墨
人造石墨
抗压强度
摩擦磨损性能
copper-based brake pads material
flake graphite
synthetic graphite
compression strength
properties of friction and wear
