Be对Al-Fe-Cu合金微观组织及时效性能的影响  

Effects of Be on Microstructure and Aging Properties of Al-Fe-Cu Alloy

作　　者：宗立君 吴亚平 杜宝帅 代正昆 ZONG Lijun;WU Yaping;DU Baoshuai;DAI Zhengkun(State Grid Shandong Electric Power Research Institute,Ji'nan 250002;Shandong Smart Grid Technology Innovation Center,Ji'nan 250002;School of Materials Science and Engineering,Central South University,Changsha 410083)

机构地区：[1]国网山东省电力公司电力科学研究院,济南250002 [2]山东省智能电网技术创新中心,济南250002 [3]中南大学材料科学与工程学院,长沙410083

出　　处：《特种铸造及有色合金》2025年第1期99-103,共5页Special Casting & Nonferrous Alloys

基　　金：国家电网有限公司总部科技资助项目(5108-202218280A-2-127-XG)。

摘　　要：采用光学显微镜(OM)与扫描电镜(SEM)观察了添加Be元素前后的Al-Fe-Cu合金微观组织,利用拉伸试验机和双电桥法检测了Al-Fe-Cu合金力学性能与电导率的变化。结果表明,加入Be后,铸态和均匀态的Al-Fe-Cu-Be合金中第二相的析出物数量增多,呈细小弥散分布;经总变形量为86%的冷拔后,Al-Fe-Cu-Be合金的抗拉强度可达161 MPa,较Al-Fe-Cu合金提高了37%。在180、210和240℃下分别时效3、6和9 h后,Al-Fe-Cu-Be合金的抗拉强度最高达175 MPa,电导率最高达32.36 MS/m。Microstructure of Al-Fe-Cu alloy before and after Be addition were observed by optical microscope(OM)and scanning electron microscope(SEM),and the variation of mechanical properties and electrical conductivity were detected by tensile testing machine and double electric bridge method.The results indicate that the amounts of precipi⁃tates in the second phase of as-cast and as-homogenized Al-Fe-Cu-Be alloy are increased with fine and dispersive dis⁃tribution.After cold drawing with a total deformation of 86%,the tensile strength of Al-Fe-Cu-Be alloy reach 161 MPa,which is 37%higher than that of Al-Fe-Cu alloy.After aging at 180℃,210℃,and 240℃for 3 h,6 h,and 9 h,respectively,the tensile strength of Al-Fe-Cu-Be alloy reach up to 175 MPa,and the conductivity is 32.36 MS/m.

关 键 词：Be元素 Al-Fe-Cu铝合金 微观组织 时效 电导率 

分 类 号：TG146.21[一般工业技术—材料科学与工程]