摘要
以固溶强化的铜锡合金为基体,以石墨和铅作为固体润滑剂,采用粉末冶金方法制备高速、重载条件用新型固体自润滑材料,研究铅对材料的高温力学性能和摩擦学行为的影响,通过分析摩擦表面和亚表面的微观形貌与结构探讨铅与石墨的协同润滑机理。结果表明:在铜石墨材料中添加铅,可显著提高材料的硬度和室温拉伸强度和300℃以下的高温压缩强度,Cu-9Sn-9Pb-10C在300℃的高温压缩强度为215.3 MPa;并可显著提高铜石墨材料在高速、重载条件下的摩擦稳定性,并略微降低平均摩擦因数。
Using copper-tin as matrix,graphite and lead as solid lubricant,the new solid self-lubricating material was fabricated by powder metallurgy and suitable for high speed and heavy load condition.The effects of lead on high-temperature mechanical properties and tribological behavior of materials were investigated.Through investigating on the friction surface and the subsurface surface,the cooperative lubrication mechanism of lead and graphite was discussed.The results show that the hardness and tensile strength are inordinately increased by adding lead in copper graphite material.And adding Lead can increase high-temperature compression strength below 300℃,the compressive strength of the material at 300℃is 215.3 MPa.Meanwhile,the friction stability of copper graphite material under high speed and heavy load condition can be significantly improved by adding lead,and the average friction coefficient is reduced slightly.
作者
甘子旸
刘咏
吕信群
谭彦妮
邹俭鹏
GAN Ziyang;LIU Yong;Lü Xinqun;TAN Yanni;ZOU Jianpeng(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China)
出处
《粉末冶金材料科学与工程》
EI
北大核心
2018年第4期347-353,360,共8页
Materials Science and Engineering of Powder Metallurgy
基金
国家自然科学基金资助项目(51625404)
关键词
铅
铜石墨材料
高速摩擦
微观结构
润滑机制
lead
copper graphite material
high speed friction
microstructure
lubrication mechanism
