钇对7085高强铝合金铸态组织的影响  

Effect of Addition of Yttrium on As-cast Microstructure of High Strength 7085 Aluminum Alloy

作　　者：吴雷 胡治流 赵艳君 丁科 谢明款 韩振尧 黄惠毅 杨娜娜 WU Lei;HU Zhi-liu;ZHAO Yan-jun;DING Ke;XIE Ming-kuan;HAN Zhen-yao;HUANG Hui-yi;YANG Na-na(College of Resources,Environment and Materials,Guangxi University,Nanning 530004;Guangxi Key Laboratory of Nonferrous Metals and Special Materials Processing,Nanning 530004,China)

机构地区：[1]广西大学资源环境与材料学院,广西南宁530004 [2]广西有色金属及特色材料重点实验室,广西南宁530004

出　　处：《铝加工》2018年第4期45-49,共5页Aluminium Fabrication

基　　金：广西科技重大专项(桂科AA17202011-1)

摘　　要：通过金相显微镜、扫描电镜、X射线衍射仪等实验方法,研究Y对7085高强铝合金铸态组织的影响。结果表明:Y能明显细化7085高强铝合金铸态组织并减少二次枝晶间距。当Y的添加量在0.3%时,铸态组织中晶粒细化效果最为显著,晶粒尺寸从120μm减少到60μm左右。Y在7085高强铝合金中主要以Al6Cu6Y和Al3Y相弥散分布在晶界上,并使得T相由网状结构变为细条状和鱼骨状。The effect of addition of Y on the as-cast microstructure of high strength 7085 aluminum alloy was investigated by opti?cal microscope,scanning electron microscope and X-ray diffraction,etc.The results showed that the as-cast microstructure of 7085 alloy was gradually fined with yttrium added.When the content of yttrium was 0.3%(mass fraction),and the grain size reduced from 120μm to 60μm,it was fined remarkably.Due to the addition of yttrium,the Al6Cu6Y and Al3Y are mainly formed and distributed at the grain boundary in 7085 alloy,which makes the reticular structure of T-phase to become a thin bar and a fishbone.

关 键 词：7085铝合金 稀土Y 铸态组织性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程] TG292[金属学及工艺—金属材料]