摘要
利用低过热度浇注和电磁搅拌技术制备半固态A356-Ce铝合金浆料。探讨了电磁搅拌频率对半固态初生α相形貌和Ce在凝固组织中的分布的影响。研究结果表明:在半固态A356-Ce合金浆料的制备过程中,电磁搅拌频率对半固态初生相的形貌以及Ce的分布影响很大,通过实验研究获得了制备半固态A356-Ce铝合金浆料的合适工艺参数,即在浇注温度为620℃,保温温度590℃,保温时间为10 min,稀土添加量为0.4%,搅拌时间为15s的条件下,搅拌频率为30 Hz的晶粒细化效果最佳,其平均形状因子为0.80,平均等级圆直径为76.1μm,稀土分布也更均匀。
The semisolid A356-Ce alloy slurry was prepared by low superheat pouring and electromagnetically stirring. The effect of the electromagnetic stirring frequency on the morphology of primary α phase and distribution of Ce in semisolid A356 alloy was investigated. The results indicated that the effect of the frequency on the morphology of primary α phase and distribution of Ce is great during the preparation of semisolid A356-Ce alloy slurry. The suitable preparing parameters were obtained by the experiment. When the A356 melt with addition of 0. 4% Ce was poured at 620 ℃ and stirred at electromagnetic frequency 15 Hz for 15 s,and then isothermally held at 590 ℃ for10 min,there were the better refinements on the primary α phase in semisolid A356-Ce alloy,in which the average shape factor reached 0. 80 and the average equal-area circle diameter was 76. 1 μm,and the distribution of Ce was more uniform.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2015年第3期328-335,共8页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(51361012)
江西省自然科学基金项目(20114bab206014)和(20142bab206012)
江西省教育厅科技落地计划项目(KJLD12070)
江西省教育厅科技项目(GJJ2014407)资助
关键词
半固态
电磁搅拌
初生Α相
稀土分布
semisolid
electromagnetic stirring
primary α phase
RE distribution
