Microstructure and properties of Al-0.70Fe-0.24Cu alloy conductor prepared by horizontal continuous casting and subsequent continuous extrusion forming  

水平连铸-连续挤压成形Al-0.70Fe-0.24Cu合金导线的显微组织和性能（英文）

作　　者：张晓苑 张辉[1,2] 孔祥鑫[1] 傅定发[1,2] 

机构地区：[1]湖南大学材料科学与工程学院,长沙410082 [2]湖南大学湖南省喷射沉积技术及应用重点实验室,长沙410082

出　　处：《Transactions of Nonferrous Metals Society of China》2015年第6期1763-1769,共7页中国有色金属学报（英文版）

基　　金：Project(20130161110007) supported by the Doctoral Program of Higher Education of China

摘　　要：A novel process for manufacturing A1-0.70Fe-0.24Cu alloy conductor was proposed, which includes horizontal continuous casting and subsequent continuous extrusion forming （Conform）. The mechanical properties, electrical conductivity and the compressed creep behaviour of the alloy were studied. The results indicate that the Conform process induces obvious grain refinement, strain-induced precipitation of AI7CuzFe phase and the transformation of crystal orientation distribution. The processed alloy has good comprehensive mechanical properties and electrical conductivity. Moreover, a better creep resistance under the conditions of 90 ~C and 76 MPa is shown compared with pure A1 and annealed copper, and the relationship between primary creep strain and time may comply with the logarithmic law. The enhanced properties are attributed to the grain refinement as well as the fine and homogeneously distributed thermally stable A1Fe and A17Cu2Fe precipitation phases.提出一种制备Al-0.70Fe-0.24Cu合金导线的新工艺,该工艺包括水平连续铸造和随后的Conform连续挤压成形,并对合金的力学性能、导电性能和压缩蠕变性能进行研究。结果表明:Conform连续挤压工艺导致明显的晶粒细化、应变诱导Al7Cu2Fe相的析出以及晶体取向分布的改变。采用该工艺加工的Al-0.70Fe-0.24Cu合金导线具有良好的综合力学性能和导电性能;在90°C和76 MPa条件下,该合金与纯铝和退火铜相比具有良好的抗蠕变性能,蠕变初始阶段的应变与时间遵循对数关系。合金性能的提高与在加工过程中形成的细晶和均匀分布的AlFe及Al7Cu2Fe热稳相有关。

关 键 词：A1-0.70Fe-0.24Cu alloy horizontal continuous casting continuous extrusion forming MICROSTRUCTURE PROPERTY 

分 类 号：TG379[金属学及工艺—金属压力加工] TG292[一般工业技术—材料科学与工程] TG146.21[金属学及工艺—金属材料]