环缝式电磁搅拌制浆技术研究及其应用  

Study and Application of Annulus Electromagnetic Stirring Process for Semi-Solid Slurry Preparation

作　　者：徐骏[1] 汤孟欧[1] 张志峰[1] 

机构地区：[1]北京有色金属研究总院有色金属加工事业部

出　　处：《特种铸造及有色合金》2011年第10期883-887,共5页Special Casting & Nonferrous Alloys

基　　金：国家高技术研究发展计划(863计划)资助项目(2009AA03Z534);国家重点基础研究发展计划(973计划)资助项目(2011CB606302)

摘　　要：电磁搅拌技术是最早应用于制备半固态坯料的方法之一,然而集肤效应限制了该技术的进一步发展。提出环缝式电磁搅拌技术旨在破解这一难题。与普通电磁搅拌相比,环缝能避开磁场较低的部分,在环缝内形成的均匀旋转磁场,可以获得均匀的温度场和均匀凝固的细小组织。环缝式电磁搅拌连铸坯组织呈蔷薇状,在铸坯中分布均匀。与普通电磁搅拌相比,环缝式电磁搅拌技术能明显降低宏观偏析和显微偏析。The electromagnetic stirring process is a well-established production route for semi-solid slurry preparation,however,the skin effects restrained its application scope. In order to overcome the problem,annulus electromagnetic stirring process（AEMS） was presented. The annulus gap could avoid the part of low magnetic induction intensity,so uniform rotating magnetic filed could be generated in the annulus gap compared to conventional electromagnetic stirring,and then uniform temperature field and uniform fine grain in the structure could be obtained. Microstructure of annulus electromagnetic stirring continuous casting billets exhibits rosette structure,which is uniformly distributed into the billets. Compared with conventional electromagnetic stirring,annulus electromagnetic stirring can greatly decrease macro-segregation and micro-segregation.

关 键 词：环缝 电磁搅拌 半固态 

分 类 号：TG249.7[金属学及工艺—铸造]