电磁搅拌对半固态Al-Zn-Mg-Cu合金组织影响及工艺  

Effects of Electromagnetic Stirring on Microstructure and Process of Semi-solid Al-Zn-Mg-Cu Alloy

作　　者：李元浩 王连登[1] 牛渊博 吴锦熙 陈明 赵洪全 Li Yuanhao;Wang Liandeng;Niu Yuanbo;Wu Jinxi;Chen Ming;Zhao Hongquan(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108;Fujian Jinrui Hightech Co.,Ltd.,Sanming 35331l;Fujian Huawei Juquan Seiko Technology Co.,Ltd.,Fuzhou 350014)

机构地区：[1]福州大学机械工程及自动化学院,福州350108 [2]福建省金瑞高科有限公司,三明353311 [3]福建华威钜全精工科技有限公司,福州350014

出　　处：《特种铸造及有色合金》2024年第4期521-527,共7页Special Casting & Nonferrous Alloys

基　　金：福建省区域重大专项基金资助项目(2023H4011)。

摘　　要：采用新型多层电磁搅拌法对半固态Al-Zn-Mg-Cu合金进行试验,研究了搅拌方式、浇注温度、搅拌速率和搅拌时间对合金性能的影响及机理。结果表明,使用多层反向搅拌法最佳,优化工艺参数:浇注温度为640℃、搅拌速率为3 000 r/min、搅拌时间为30 s,该条件下能够获得具有良好晶粒尺寸和形貌的半固态浆料组织。采用多层反向电磁搅拌可增强合金熔体的流动性,提高温度场和溶质场的均匀性,使合金熔体的紊乱程度更高,改善初生相的尺寸和形貌。Through a new multi-layer electromagnetic stirring method, effects of stirring methods, casting temperature, stirring rate, and stirring time on properties of semi-solid Al-Zn-Mg-Cu alloy as well as the mechanism were investigated. The results reveal that multi-layer reverse stirring method is optimal, and the optimal process parameters are casting temperature of 640 ℃, stirring rate of 3 000 r/min, and stirring time of 30 s, where semi-solid slurry structure with well grain size and morphology can be obtained.The flow quantity of alloy melt is increased, and the uniformity of temperature field and solute field are improved by adopting multi-layer reverse electromagnetic stirring, enhancing the disorder level of alloy melt, and improving the size and morphology of primary phases.

关 键 词：多层电磁搅拌法 半固态加工 AL-ZN-MG-CU合金 

分 类 号：TG146.21[一般工业技术—材料科学与工程]