铝代铅新型铜基自润滑材料的摩擦磨损性能  

Friction and wear properties of copper matrix self-lubrication composites without Pb

作　　者：丁莉[1] 姚萍屏[1] 樊坤阳[1] 佘直昌[1] 贡太敏[1] 肖叶龙[1] 赵林[1] 

机构地区：[1]中南大学粉末冶金国家重点实验室,长沙410083

出　　处：《粉末冶金材料科学与工程》2011年第4期487-491,共5页Materials Science and Engineering of Powder Metallurgy

基　　金：湖南省杰出青年基金资助项目(10JJ1009);粉末冶金国家重点实验室创新基金资助项目(32840102505)

摘　　要：采用粉末松装烧结法,以Al代替Pb制备新型无铅铜基自润滑材料,研究Al含量（w（Al）为2%~12%）对该材料摩擦磨损性能的影响。结果表明：随着Al含量增加,材料硬度逐渐降低,摩擦因数呈现先降低后增加的趋势。当Al质量分数为6%时,该材料在油摩擦环境下（载荷50 N,转速900 r/min）的摩擦因数为0.089 85,磨痕宽度为1 095μm,摩擦面较光滑、平整,具有较好的摩擦磨损性能,且自润滑层与钢背的结合强度较高;实验结果表明用Al替代Pb制备新型无铅铜基自润滑材料是可行的,为绿色环保双金属自润滑材料的研究提供了参考依据。Lead-free copper matrix self-lubricating composites were prepared by powder metallurgy loose sintering.The influence of aluminum（witch is used to replace lead） content on the composite friction and wear properties was studied.The results show that the hardness of the lead-free copper matrix self-lubrication composites decreases and friction factor first increases then decreases with increasing the aluminum content.The composite with Al content of 6%（mass fraction） has better friction and wear performances,e.g.friction coefficient is 0.089 85 and wear nick width is 1 095 μm in case of oil friction with loading of 50 N and revolution speed of 900 r/min,and the friction surface is smooth and flat.It is demonstrated that lead-free bimetal self-lubricating composites with Al to replace of Pb is feasible,which can provide a reference for the study of green environmental bimetal self-lubricating materials.

关 键 词：自润滑 无铅 松装烧结 摩擦因数 

分 类 号：TB331[一般工业技术—材料科学与工程]