引晶法制备半固态A356铝合金浆料的流变压铸  

Rheo-Diecasting of Semi-Solid A356 Al-Alloy Slurry Prepared by Introducing Grain Process

作　　者：陈正周 

机构地区：[1]慈溪市汇丽机电有限公司,浙江慈溪315333

出　　处：《铸造》2014年第9期900-902,905,共4页Foundry

摘　　要：将引晶法制备的A356铝合金半固态浆料进行流变压铸,研究铸件在铸态和T6热处理条件下的力学性能和微观组织.结果表明：在铸态下铸件的抗拉强度可达到250 MPa左右,伸长率为9％～13％;经过T6热处理后,抗拉强度可提高约30％,但伸长率略有下降.引晶法可制备出初生α1（Al）的形状因子为0.76～0.85和晶粒尺寸为20～40 μm的优质半固态A356铝合金浆料.Semi-solid A356 Al-alloy slurries were rheo-diecast by introducing grain process （IGP）.The mechanical properties and microstructures of the castings were investigated under as-cast and T6 heat treatment respectively.The results show that the as-cast ultimate tensile strength can reach about 250 MPa and the elongation is 9%-13%.The ultimate tensile strength can increase approximately 30% higher than that of the as-cast one but there is some slight sacrifice of the plasticity after T6 heat treatment.The sound semi-solid A356 Al-alloy slurries,whose shape factor is 0.76-0.85 and the grain diameter is 20-40 μm,can be produced by IGP.

关 键 词：引晶 流变压铸 A356铝合金 力学性能 微观组织 

分 类 号：TG249.2[金属学及工艺—铸造]