有色金属科学与工程2017，Vol.8Issue(5)：76-82,7.DOI:10.13264/j.cnki.ysjskx.2017.05.011
电磁搅拌方式和稀土对半固态A356合金凝固组织的影响
Effect of electromagnetic stirring way and rare earth on solidification structure of semi-solid A356 alloy
摘要
Abstract
The slurry of semi -solid A356 aluminum alloy was prepared by the mode of two -way electromagnetic stirring, combined with rare earth elements. The effects on its morphology of primary phase were investigated in the way that no rare earth, single rare earth 0.5 %Ce (mass fraction, similarly hereinafter) and mixed rare earth 0.3 %La+0.2 % Yb were applied to be stirred for 12 s in electromagnetic stirring modes (one-way continuous stirring, two-way continuous stirring, and two-way intermittent stirring) in the magnetic field with a frequency of 30 Hz by the ways of OM, XRD and SEM. The results indicate that when the total percentagecontent of RE is the same, mixed RE is better than the other two in optimizing the solidification microstructure of the alloy with the average of the equal-area-circle diameter and shape factor of the primary phase reaching 36.4 um and 0.82.On the basis of this, the melt was treated with different mixing methods. This experiment shows that the strong turbulence and inertial impact are formed by two-way continuous stirring, andthen accelerate the mass and heat transfer in the solidifying system,in which the size and morphology of grainsaremore finer and round compared to one-way continuous stirring and two-way intermittent stirring.关键词
A356铝合金/双向电磁搅拌/稀土细化/凝固组织Key words
A356 aluminum alloy/two-way electromagneticstirring/RE refining/solidification microstructure分类
矿业与冶金引用本文复制引用
陈涛,刘政,陈志平,张嘉艺..电磁搅拌方式和稀土对半固态A356合金凝固组织的影响[J].有色金属科学与工程,2017,8(5):76-82,7.基金项目
国家自然科学基金资助项目(51144009,51361012) （51144009,51361012）
江西省自然科学基金资助项目(20142bab206012) （20142bab206012）
江西省教育厅科技资助项目(GJJ14407) （GJJ14407）
