A356铝合金半固态流变压铸件力学性能的研究  

Mechanical Properties of Semi-solid Rheo-die Casting A356 Aluminum Parts

作　　者：张军[1] 康永林[1] 张帆[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》2011年第8期718-720,共3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);广东省中国科学院全面战略合作项目(2009B091300017)

摘　　要：采用自主研发的锥桶式流变成形机(TBR),进行了流变压铸工艺正交试验,研究了浇注温度、剪切速率及剪切温度对A356铝合金半固态流变压铸力学性能的影响规律,并确定了最佳的参数,使A356流变压铸件获得最优的力学性能。结果表明,影响抗拉强度的主要因素是浇注温度,影响伸长率的主要因素是剪切温度。TBR流变压铸工艺生产A356铝合金压铸件的最优工艺参数:浇注温度为655℃,剪切速度为5000s-1,剪切温度为600℃,在此工艺条件下,制备的半固态成形件力学性能为:σb=271MPa,δ=7.3%。In order to determine the best parameters to obtain the optimized mechanical properties of rheo-die casting A356 alloy parts,effects of pouring,rotating speed of inner barrel and shearing temperature on the mechanical properties of the rheo-casting parts were investigated by means of self-developed taper barrel rheo-moulding machine with orthogonal testing.The results show that tensile strength of the parts is mainly controlled by pouring temperature,and elongation is mainly dependent on the shearing temperature.Tensile strength and elongation of the rheo-die casting A356 semi-solid alloy parts can reach up to 271 MPa and 7.3%,respectively,with pouring at 655℃ and shearing at 600 ℃,shear speed is 5 000/s.

关 键 词：TBR 半固态 流变A356 力学性能 

分 类 号：TG292[金属学及工艺—铸造]