Zr含量对5083铝合金铸轧板组织和性能的影响  

Effect of Zr Content on Microstructure and Properties of 5083 Aluminum Alloy Cast-rolling Plate

作　　者：刘柱 孙玉崇 侯忠霖[1,2] 徐振 吕哲 陈庆强 LIU Zhu;SUN Yuchong;HOU Zhonglin;XU Zhen;LYU Zhe;CHEN Qingqiang(College of Materials and Metallurgy,Liaoning University of Science and Technology,Anshan 114051,Liaoning,China;Provincial Key Laboratory of Metallurgical Equipment and Process Control,Liaoning University of Science and Technology,Anshan 114051,Liaoning,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,济南250101

出　　处：《材料导报》2024年第15期56-61,共6页Materials Reports

基　　金：国家自然科学基金(52104377);冶金设备及过程控制重点实验室(科技厅)(2023KFKT-03)。

摘　　要：采用立式双辊铸轧机制备了Zr含量为0%~0.25%(质量分数,下同)的5083-xZr铝合金铸轧板。采用光学显微镜和扫描电镜对铸轧板边部与心部的组织进行观察分析。利用电化学工作站和电子万能试验机对铸轧板的耐腐蚀性和室温拉伸性能进行检测,系统研究了Zr含量对5083铝合金铸轧板的微观组织及性能的影响。研究结果表明,Zr对5083铝合金铸轧板的晶粒有明显的细化作用,随着Zr含量的增加,晶粒的细化作用增强,边部晶界上的析出相增多,心部粗大的共晶相得到改善,铸轧板的力学性能提升。在四种成分的合金中,当Zr含量为0.25%时,合金的耐腐蚀性较佳,自腐蚀电位为-654.5 mV,腐蚀电流衰减到1.37×10^(-7)A/cm^(2)。此时,板材的边部晶粒尺寸为46.87μm,心部晶粒尺寸为32.55μm,铸轧板的抗拉强度、屈服强度和延伸率分别为137.12 MPa、98.37 MPa和10.21%。In this work,5083-x Zr aluminum alloy cast-rolling plates with Zr content from 0wt%to 0.25wt%were prepared by vertical twin-roll casting mill.The microstructure of the edge and center of the cast-rolled sheet was observed and analyzed by optical microscope and scanning electron microscope.The corrosion resistance and room temperature tensile properties of the cast-rolling plate were tested by electrochemical workstation and electronic universal testing machine.The effects of Zr content on the microstructure and properties of 5083 aluminum alloy cast-rolled sheet were systematically studied.The results show that Zr has a significant refining effect on the grain of 5083 aluminum alloy cast-rolled sheet.With the increase of Zr content,the grain refinement effect is enhanced,the precipitated phase on the edge grain boundary is increased,the coarse eutectic phase in the center is improved,and the mechanical properties of the cast-rolled sheet are improved.When the Zr content is 0.25wt%,the corrosion resistance is better,the self-corrosion potential is-654.5 mV,and the corrosion current decays to 1.37×10^(-7)A/cm^(2).At this time,the grain size of the edge of the plate is 46.87μm,and the grain size of the center is 32.55μm.The tensile strength,yield strength and elongation of the cast-rolling plate are 137.12 MPa,98.37 MPa and 10.21%,respectively.

关 键 词：Zr元素 微合金化 铸轧板 组织 性能 

分 类 号：TG113[金属学及工艺—物理冶金]