摘要
以固溶强化的铜锡合金作为基体,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;铅的添加可提高铜-石墨材料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;添加铅可显著提高铜-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 that is suitable for high speed and heavy load condition was fabricated by powder metallurgy.The effects of lead on high-temperature mechanical properties and tribological behavior of materials were investigated.Through the investigation 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 can be markdly increased by adding lead in copper graphite material.Adding lead can also 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3期238-245,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
Pb
copper-graphite material
high speed friction
microstructure
lubrication mechanism
