复合工艺制备半固态A356铝合金浆料的研究  

Research of Compound Technology on Semi-Solid A356 Alloy Slurry

作　　者：刘政[1] 毛卫民[2] 

机构地区：[1]江西理工大学机电工程学院,江西赣州341000 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《铸造》2011年第7期623-628,共6页Foundry

基　　金：国家自然科学基金项目(50374012);江西省自然科学基金项目(0650047);江西省教育厅科技项目(GJJ09229);江西理工大学科学研究基金项目(jxxjzd10003)资助

摘　　要：将晶粒细化处理引入低过热度浇注和弱电磁搅拌技术中,形成了制备半固态合金浆料的复合工艺。应用复合工艺制备了半固态A356铝合金浆料,研究了复合工艺对所制备的半固态初生α相形貌和尺寸的影响。研究结果表明,细化处理的液态A356铝合金经低过热度浇注和弱电磁搅拌可制备具有颗粒状和蔷薇状初生α相的半固态浆料,并且浇注温度可适当提高。与未经细化处理的A356铝合金试样相比,细化处理可显著改善A356铝合金中初生α相的晶粒尺寸和颗粒形貌及其沿铸锭径向上的分布。Compound technology preparing semi-solid alloy slurry was formed by combining grain-refined with low superheat pouring and slightly electromagnetic stirring.Semi-solid A356 alloy slurry was prepared by compound technology and the effects of compound technology on the morphology and the grain size of the primary α phases were researched.The results indicate that the slurry with particle-like and rosette-like primary α phases can be prepared by low superheat pouring and slightly electromagnetic stirring from liquid A356 alloy grain-refined,in which the pouring temperature can be suitably raised.Compared with the A356 samples without grain-refined,the grain size and particle morphology of primary α phase as well as the distribution of the grain with particle-like or rosette-like along radial in the ingot in A356 are markedly improved by grain-refined.

关 键 词：半固态 复合工艺 Ti基细化剂 A356铝合金 

分 类 号：TG249.9[金属学及工艺—铸造]