挤压压力及热处理对AM60组织性能的影响  

Effect of Extrusion Stress and Heat Treatment on Structure and Properties of AM60

作　　者：刘津伟[1] 康永林[1] 赵鸿金[1] 王朝辉[1] 徐跃[1] 董文超[1] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083

出　　处：《汽车工艺与材料》2004年第7期24-25,36,共3页Automobile Technology & Material

摘　　要：研究了不同挤压压力以及热处理对AM60镁合金组织和力学性能的影响。结果表明:增加挤压压力,可以改善铸态组织,减轻枝晶分布;通过固溶时效热处理,晶粒球化,β-Mg17Al12析出相的形态和分布发生了变化,由晶界周围不规则分布的块状变为晶界上不连续分布的颗粒状,提高了力学性能。This paper demonstrates the effect of extrusion stress and heat treatment on AM60structure and properties.The results show that increase of extrusion stress may improve the as cast structure and reduce distribution of dendritic structure.Transformation from bulk's abnormal distribution around grain boundary to granular discontinuity distribution around grain boundary can increase mechanical properties by taking solid solutional aging treatment ,grain spherazion and changes ofβ-Mg 17 Al 12 shape and distribution.

关 键 词：镁合金 挤压铸造 热处理 组织性能 

分 类 号：TG27[金属学及工艺—铸造] TG146.22[一般工业技术—材料科学与工程]