浇铸温度对液-固铸轧1070A/7075铝合金复合板材界面组织与性能的影响  

Effect of casting temperature on the interface microstructure and properties of liquid-solid cast-rolling 1070A/7075 aluminum alloy composite sheet

作　　者：田双永 孙玉崇 徐振 宋华[2] 廉法博[2] 陈庆强 TIAN Shuangyong;SUN Yuchong;XU Zhen;SONG Hua;LIAN Fabo;CHEN Qingqiang(School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China;Provincial Key Laboratory of Metallurgical Equipment and Process Control,University of Science and Technology Liaoning,Anshan 114051,China;School of Mechanical and Electrical Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]辽宁科技大学冶金设备与过程控制省级重点实验室,辽宁鞍山114051 [3]山东建筑大学机电工程学院,山东济南250101

出　　处：《轻合金加工技术》2023年第5期13-21,共9页Light Alloy Fabrication Technology

基　　金：国家自然科学基金(52104377);辽宁省冶金设备与过程控制重点实验室开放课题基金资助。

摘　　要：采用立式双辊铸轧机液-固铸轧1070A/7075铝合金复合板材,借助扫描电镜(SEM)、能谱仪(EDS)、硬度计和剪切机、拉伸试验机等检测仪器,探讨了1070A铝溶体浇铸温度对液-固铸轧1070A/7075铝合金复合板材界面组织与性能的影响。结果表明:随着浇铸温度的升高,复合板材界面处元素扩散宽度不断增大,复合板剪切强度不断增高,7075铝合金固态基板一侧的高硬度分布区域变窄。当浇铸温度为690℃时,复合板材界面无明显缺陷,元素扩散距离约为15μm,显微硬度变化趋势较为缓和,剪切强度达79.3 MPa,抗拉强度、屈服强度、伸长率分别达到139.6 MPa、70.3 MPa、24.2%。The vertical twin-roll casting machine was used to prepare liquid-solid cast-rolling 1070A/7075 aluminum alloy composite sheet.By means of scanning electron microscopy(SEM),energy dispersive spectroscopy(EDS),microhardness,shear and tensile testers,the effect of casting temperature of aluminum melt on the interfacial microstructure and properties of solid-liquid cast-rolling 1070A/7075 aluminum alloy composite sheet were analyzed.The results show that with the increase of casting temperature,the diffusion width of interficial elements of the composite sheet increases,the shear strength of the composite sheet increases,and the high hardness distribution area on the 7075 aluminum alloy side of the solid substrate narrows.When the casting temperature is 690 ℃,there is no obvious defect at the interface of the composite sheet,the element diffusion distance is about 15 μm,the microhardness change trend is relatively moderate,the shear strength reaches 79.3 MPa,and the tensile strength,yield strength and elongation reach 139.6 MPa,70.3 MPa and 24.2%,respectively.

关 键 词：液-固铸轧 1070A/7075铝合金复合板 结合界面 元素扩散 

分 类 号：TG146.21[一般工业技术—材料科学与工程]