环缝式电磁搅拌对7075铝合金热处理的影响  

Effects of Annular Electromagnetic Stirring Preparation Process on the Homogenization Treatment Time of 7075 Aluminium Alloy

作　　者：高志华[1] 徐骏[1] 张志峰[1] 汤孟欧[1] 刘国钧[1] 

机构地区：[1]北京有色金属研究总院国家有色金属复合材料工程技术研究中心

出　　处：《特种铸造及有色合金》2014年第2期163-166,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB606302);国家高技术研究发展计划(863计划)资助项目(2013AA030701);国家国际科技合作计划资助项目(2013DFA51370)

摘　　要：研究了无电磁搅拌、普通电磁搅拌和环缝式电磁搅拌等不同制备方法对7075铝合金均匀化热处理时间的影响。结果表明,相比于无电磁搅拌和普通电磁搅拌,环缝式电磁搅拌工艺制备的7075铝合金的凝固组织更加均匀细小。同时通过观察不同制备方法得到的7075铝合金均匀化热处理后的显微组织变化规律,发现环缝式电磁搅拌工艺制备的7075铝合金均匀化热处理的时间明显缩短。均匀化热处理后合金硬度和电导率的变化亦证明了这点。Effects of non-electromagnetic stirring（N-EMS）、conventional electromagnetic stirring（EMS）and annular electromagnetic stirring（A-EMS）preparation process on homogenization treatment time of 7075 aluminium alloy were investigated.The results indicate that,compared with N-EMS and EMS,the A-EMS process exhibits superior grain refinement ability.The microstructures of 7075 aluminum alloy were observed at different preparation methods after different homogenization heat treatment time.The results reveal that A-EMS preparation process can decrease the time of homogenization treatment obviously.The changes of alloy hardness and electrical conductivity after different homogenization treatment also proved the result.

关 键 词：7075铝合金 环缝式电磁搅拌 均匀化热处理 

分 类 号：TG292[金属学及工艺—铸造]