石墨对Cu-12Al-6Ni粉末合金组织和性能影响  

Microstructure and mechanical properties of Cu-12Al-6Ni with graphite addition prepared by powder metallurgy

作　　者：邓正华 尹海清 王海宝 李万全 纪安平 DENG Zhenghua;YIN Haiqing;WANG Haibao;LI Wanquan;JI Anping(School of Mechanical Engineering,Chongqing Three Gorges University,Chongqing 404000,China;Chongqing Engineering Technology Research Center for Light Alloy and Processing,Chongqing 404000,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]重庆三峡学院机械工程学院,重庆404000 [2]重庆市轻合金材料与加工工程技术研究中心,重庆404000 [3]北京科技大学钢铁共性技术协同创新中心,北京100083

出　　处：《粉末冶金工业》2022年第3期75-80,共6页Powder Metallurgy Industry

基　　金：重庆市自然科学基金资助项目(cstc2021jcyj-msxmX0899,cstc2017jcyjA1543);重庆市教委科学技术研究项目(KJQN202101234,KJQN201801202);重庆市轻合金材料与加工工程技术研究中心开放基金资助项目(GCZX201703)。

摘　　要：研究了石墨的添加对Cu-12Al-6Ni粉末合金组织和性能影响。结果表明:随着石墨含量增加,合金中的孔隙、Al_(4)Cu_(9)和NiAl相逐渐增多;合金的烧结密度、硬度和抗拉强度随着石墨的增加逐渐减小,而合金的摩擦因数和磨损量都先增大后减小,当石墨含量为0.5%时磨损达到最大,当石墨含量为1%时摩擦因数达到最大,当石墨添加2%时,磨损量比不添加石墨合金降低了约32%。The effect of graphite on the microstructure and properties of Cu-12Al-6Ni alloy prepared by powder metallurgy was investigated. The results show that the number of pores, Al_(4)Cu_(9), and NiAl phases in the structure increases with increasing of the graphite content. The sintering density, hardness and tensile strength of the alloy decreases as the graphite content increases. The friction coefficient and wear loss of the alloy first increases and then decreases with the increasing of the graphite content. When the graphite content is 0.5%, the friction coefficient reaches a maximum, and when the graphite content is 1%, the wear loss maximizes. When the graphite content is 2%, the wear loss of alloy is approximately 32% lower than that of the alloy without graphite.

关 键 词：铜铝合金 石墨 抗拉强度 粉末冶金 摩擦性能 

分 类 号：TF125.22[冶金工程—粉末冶金]