变形量对电力电缆用Al2O3颗粒强化铜合金组织与性能的影响  

Effect of cold deformation on microstructures and properties of Al2O3-dispersion strengthened copper for power cable

作　　者：张景杰[1] ZHANG Jing-jie(School of Mechanical and Electrical Engineering,He’nan Radio and Television University,Zhengzhou 450000,China)

机构地区：[1]河南广播电视大学机电工程学院

出　　处：《粉末冶金工业》2019年第6期51-54,共4页Powder Metallurgy Industry

基　　金：2017年河南省科技攻关项目（172102210562）

摘　　要：对不同变形量冷抜处理的电力电缆用Al2O3颗粒强化铜合金(Cu-5%Al2O3),进行硬度、导电率、拉伸性能以及微观组织测试。研究结果表明:随着变形量增加,合金的硬度增加,导电率并未发生显著改变。合金经冷抜处理后产生显著的加工硬化现象。随变形量增加,加工硬化速率明显加快,合金的抗拉强度与屈服强度增长速度较为稳定,但伸长率减小。冷抜处理后合金基体中形成了致密的组织,没有形成明显的孔洞或裂纹,合金中形成了许多均匀分布的尺寸为300 nm左右细小晶粒,形成平直的晶界,部分区域产生了很高的位错密度。The hardness,electrical conductivity,tensile properties and microstructures of Al2O3-dispersion strengthened copper alloy(Cu-5%Al2O3)for power cables with different deformation were tested.The results show that with the increase of deformation,the hardness of the alloy increases and the electrical conductivity does not change significantly.After cold rolling treatment,a remarkable work hardening phenomenon occurs.With the increase of deformation,the work hardening rate accelerates obviously.The growth rate of tensile strength and yield strength of the alloy is relatively stable,but the elongation decreases.After cold rolling,compact structure was formed in the alloy matrix,and no obvious holes or cracks were formed.Many fine grains with uniform size of about 300 nm with flat grain boundaries were formed in the alloy,resulting in high dislocation density in some regions.

关 键 词：Cu-5%Al2O3合金 电力电缆 力学性能 显微组织 

分 类 号：TM247[一般工业技术—材料科学与工程] TG146.11[电气工程—电工理论与新技术]