退火工艺对冷轧Al-Er-Cu合金电导率和硬度的影响  

Influence of annealing on electrical conductivity and hardness of Al-Er-Cu alloys

作　　者：刘同辉[1] 文胜平[1] 李健飞[1] 陈子勇[1] 聂祚仁[1] 

机构地区：[1]北京工业大学材料学院,北京100124

出　　处：《材料热处理学报》2017年第6期31-35,共5页Transactions of Materials and Heat Treatment

基　　金：北京市自然科学基金(KM201310005002);青海省科技计划项目(2015-GX-C02A)

摘　　要：采用硬度和电导率等测试,结合透射电镜微观组织观察,研究了退火工艺对Al-Er-Cu合金电导率和硬度的影响。结果表明:冷轧后等时退火到200~300℃之间,或者200℃等温退火24 h到48 h之间,Al-Er-Cu合金同时具有较高的硬度和电导率。Al-Er-Cu合金冷轧后退火过程中Al_3Er相的析出提高了合金轧态组织的热稳定性,使其硬度能够在退火过程中减少下降;而Al_2Cu相的析出使合金的电导率显著升高。Influence of annealing on electrical conductivity and hardness of Al-Er-Cu alloys was investigated by means of electrical conductivity test, hardness test and transmission electron microscopy. The results indicate that high hardness and electrical conductivity of the Al-Er-Cu alloys are obtained after isoehronal annealing to between 200 and 300 ℃ or isothermal annealing at 200 ℃ for 24 to 48 h. Al3Er phase precipitating during annealing can enhance thermal stability of the cold roiling microstructure and retard the declining of hardness of the Al-Er-Cu alloys. Al2Cu precipitation leads to the increase of the electrical conductivity of the Al-Er-Cu alloys.

关 键 词：铝合金 微合金化 退火 电导率 

分 类 号：TG146.2[一般工业技术—材料科学与工程]