强制搅拌方法制备A356铝合金半固态浆料  

Preparation of A356 Aluminum Alloy Semi-solid Slurry by Forced Convection Method

作　　者：郜俊震[1] 康永林[1] 周冰[1] 李扬德 李卫荣 

机构地区：[1]北京科技大学材料科学与工程学院 [2]广东东莞宜安科技股份有限公司

出　　处：《特种铸造及有色合金》2013年第10期931-934,共4页Special Casting & Nonferrous Alloys

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB606302-1);国家高技术研究发展计划(863计划)资助项目(2013AA031001)

摘　　要：介绍了自主研发的强制搅拌流变成形设备(FCR),其核心部件是剪切搅拌机构和电气温度控制系统。研究了不同浇注温度对A356铝合金半固态组织的影响规律。结果表明,该试验设备在转速为200r/min,搅拌时间为30s,浇注温度为620℃时,可制备出晶粒细小(80μm)、形貌圆整(圆整度为0.75)且分布均匀的半固态组织。随着浇注温度的降低,合金初生相明显细化,形貌更加圆整,组织更加均匀。We have developed a forced convection rheoforming machine （FCR）, which mainly is composed of the shearing system and the electricity and temperature control system. Effects of pouring tempera- tures on microstructure of A356 aluminum alloy semi-solid slurry prepared by FCR machine were inves- tigated. The results show that the apparatus is capable of producing semi-solid microstructure with fine, homogeneous and spherical grains with rotating velocity of 200 r/min for 30 s at 620 ℃. And the prima- ry α-Al particles become finer, more homogeneous and rounder with the decrease of pouring tempera- ture.

关 键 词：FCR 半固态 A356铝合金 显微组织 

分 类 号：TG249.9[金属学及工艺—铸造]