半固态A356铝合金流变浆料的制备技术研究  

Preparation of A356 Alloy Semi-solid Rheological Slurry

作　　者：刘永峰[1] 毛卫民[1] 汤国兴[1] 白月龙[1] 

机构地区：[1]北京科技大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2007年第3期185-187,共3页Special Casting & Nonferrous Alloys

基　　金：国家自然科学基金资助项目(50374012);国家重大基础研究规划(973)项目(2006CB605203);国家高技术发展计划(863)项目(2006AA03Z115)

摘　　要：利用行波电磁搅拌和低过热度浇注复合制备工艺成功地制备了A356半固态流变浆料。研究了浇注温度、搅拌功率和搅拌时间对A356铝合金的半固态浆料的影响。研究表明,该工艺可制备出符合流变成形所需的A356铝合金半固态浆料,浇注温度在液相线附近,搅拌功率越大,搅拌时间大于6s制备的A356半固态流变浆料中的初生α-Al越圆整,尺寸越细小。最佳工艺参数:搅拌温度为630℃,搅拌功率为1.2kW,搅拌时间为6s。Effects of pouring temperature,stirring power and stirring time on A356 aluminum alloy semi-solid rheological slurry prepared by the complex method of traveling-wave electromagnetic stirring and low super-heat were discussed.It is found that the prepared A356 Al alloy semi-solid rheological slurry by the complex method can meet the requirements of rheological casting.Primary α-Al in the semi-slid slurry is more and more round and its grain size is finer with increasing in stirring power in the conditions of stirring time more than 6 s and pouring at temperature near to liquidus temperature.The optimized processing parameters have been obtained including stirring temperature of 630 ℃ and stirring power of 1.2 kW and stirring time of 6 s.

关 键 词：A356 半固态浆料 行波搅拌 低过热度 流变成形 微观组织 

分 类 号：TG249.9[金属学及工艺—铸造]