强磁场下电磁振荡强度与频率对Zn-20% Bi过偏晶合金显微组织的影响  

Effect of intensity and frequency of electromagnetic vibration on the microstructure of Zn-20% Bi hypermonotectic alloy under high magnetic field

作　　者：郑天祥[1] 钟云波[1] 范丽君[1] 王江[1] 龙琼[1] 冯美龙[1] 孙宗乾[1] 吴秋芳[1] 李甫[1] 周鹏伟[1] 任忠鸣[1] 

机构地区：[1]上海大学上海市现代冶金与材料制备重点实验室,上海200072

出　　处：《中国科技论文》2014年第2期163-167,共5页China Sciencepaper

基　　金：国家自然科学基金资助项目(50974085;51034010);上海市人才发展基金资助项目(2009046);国家高技术研究发展计划资助项目(2009AA03Z109);上海市重大科技攻关项目(09dz1206401;09dz1206402);上海市重大研究创新项目(09zz98)

摘　　要：采用强磁场复合交变电流方法细化Zn-20%Bi过偏晶合金的显微凝固组织,研究了磁感应强度、电磁振荡强度和交变电流频率对Zn-20%Bi过偏晶合金显微组织的影响。随着磁感应强度的增加,合金组织中第二富Bi相粒径逐渐得到细化;随着电磁振荡强度的增加,富Bi相尺寸先减小后增加;随着交变电流频率的增加,富Bi相尺寸也是先减小后增加,存在一个最佳频率。并解释说明了各因素的影响机制。Microstructure of Zn-20%Bi hypermonotectic alloy was refined through electromagnetic vibration produced by high magnetic field compound with alternative current （AC）.The effects of magnetic induction intensity,electromagnetic vibration and AC frequency on the microstructure of Zn-20%Bi hypermonotectic alloy were investigated.The results showed that increas-ing the intensity of magnetic induction is beneficial to the refinement of the second Bi-rich phase.We also found that the dimen-sion of Bi-rich phase decreased firstly and increased later with the increase of electromagnetic vibration and AC frequency.Both e-lectromagnetic vibration and AC frequency had an optimal value.The mechanisms of different factors are discussed.

关 键 词：锌合金 显微组织 磁场 电磁振荡 偏析 

分 类 号：TG146.13[一般工业技术—材料科学与工程]