水平连铸-连续挤压-拉拔Al-0.65Mg-0.58Si-0.17Fe合金微观组织与性能研究  

Microstructure and Properties of Al-0.65Mg-0.58Si-0.17Fe Alloy Prepared by Horizontal Continuous Casting,Continuous Extrusion and Drawing Process

作　　者：张瀚 成祥茂 陈诚 蓝淑财 王锐 范亚洲 张永甲 党朋 ZHANG Han;CHENG Xiangmao;CHEN Cheng;LAN Shucai;WANG Rui;FAN Yazhou;ZHANG Yongjia;DANG Peng(Chaozhou Power Supply Bureau,Guangdong Power Grid Co.,Ltd.,Chaozhou 521000,Guangdong,China;Electric Power Research Institute,Guangdong Power Grid Co.,Ltd.,Guangzhou 510030,Guangdong,China;Shanghai Cable Research Institute Co.,Ltd.,Shanghai 200093,China)

机构地区：[1]广东电网有限责任公司潮州供电局,广东潮州521000 [2]广东电网有限责任公司电力科学研究院,广东广州510030 [3]上海电缆研究所有限公司,上海200093

出　　处：《矿冶工程》2024年第5期174-178,共5页Mining and Metallurgical Engineering

基　　金：中国南方电网科技项目(GDKJXM20220841)。

摘　　要：通过水平连铸-连续挤压-拉拔工艺制备了高强度高电导率Al-0.65Mg-0.58Si-0.17Fe合金线材,研究了加工工艺及热处理对合金微观组织、力学性能和电导率的影响。结果表明,水平连铸-连续挤压工艺提高了合金过饱和固溶度并显著细化了晶粒组织,拉拔过程引入的高密度位错改变了合金时效热处理过程中Mg_(2)Si相的析出行为,Al-0.65Mg-0.58Si-0.17Fe合金经水平连铸-连续挤压-拉拨,在155℃下时效3 h,其拉伸强度和延伸率分别为335 MPa和6.9%,电导率55.7%IACS。High-strength and high-conductivity Al-0.65Mg-0.58Si-0.17Fe alloy wire was prepared by adopting horizontal continuous casting process followed by continuous extrusion and drawing processes,and effects of such processing technique and heat treatment on microstructure,mechanical properties and conductivity of the prepared alloy were investigated.The results show that the processing technique of horizontal continuous casting plus continuous extrusion can improve the solid solubility in supersaturated alloy and lead to significantly grain refinement,and the following drawing process introduces high-dense dislocation,which changes the precipitation behavior of Mg_(2)Si phase during the ageing treatment of the alloy.It is shown that Al-0.65Mg-0.58Si-0.17Fe alloy prepared by the processes of horizontal continuous casting,continuous extrusion and drawing is subjected to 3 hours of aging treatment at 155℃,resulting in its tensile strength of 335 MPa,elongation rate of 6.9%,and electrical conductivity of 55.7%IACS.

关 键 词：AL-MG-SI合金 水平连铸 连续挤压 拉拨 铝合金导线 

分 类 号：TG146[一般工业技术—材料科学与工程]