有色金属科学与工程Issue(6)：92-98,7.
稀土Y在电磁搅拌条件下对半固态ZL101铝合金初生α相的影响
Effect of yttrium on primary αphase in semisolid ZL101 alloy under electromagnetic stirring
摘要
Abstract
The yttrium is selected as the refiner for ZL101 alloy, meanwhile the electromagnetic stirring device, which is controlled by changing the frequency of electric current, is used to stir the ZL101 alloy for a few seconds. Mechanism of using rare earth to refine the semi-solid alloy and effects of different frequencies on microstructure of primary α phase in different areas of the cast ingot as well as the best parameter of the electromagnetic stirring frequency are discussed. The results indicate that the liquid ZL101 alloy that poured at low superheat temperature (620 ℃) is slightly electromagnetic-stirred under the condition of 30 Hz and 15 s for a short time and then holding at 590 ℃ for 5 min, the morphology and grain size of primary α phase reach the optimal state. The average equal-area circle diameter of grain in the core area is 64.95 μm and the average shape factor is 0.80; while the average equal-area circle diameter of grain in the edge area is 58.98 μm and the average shape factor is 0.83. Under this condition, the morphology and grain size of primary α phase in semisolid ZL101 alloy slurry are quite satisfactory but more uniformly distributed along the radial direction.关键词
电磁搅拌/半固态/ZL101铝合金/稀土钇/搅拌频率Key words
electromagnetic stirring/semisolid/ZL101 alloy/yttrium/stirring frequency分类
矿业与冶金引用本文复制引用
刘政,谌庆春,许鹤君,郭颂,章升程..稀土Y在电磁搅拌条件下对半固态ZL101铝合金初生α相的影响[J].有色金属科学与工程,2013,(6):92-98,7.基金项目
国家自然科学基金资助项目（51144009、51361012）；江西省自然科学基金资助项目（20114bab206014）；江西省教育厅科技落地计划项目 （）
