摘要
分别采用转角为100°、110°、120°的三个凹模,在A、Ba、Bc、C四种路径下进行等通道转角挤压实验。实验发现,当模具温度为380℃时,AZ91镁合金通过等通道转角挤压工艺可以挤压出宏观外形完整无裂纹产生的试样;经过几个道次的等通道挤压后,材料中就有大量的超细晶粒出现;当模具角度为100度时,以C路径进行挤压,随变形道次的增加,其细化过程稳定,细化效果最好;经过4次挤压晶粒平均直径可达到3μm。
The ECAP experiment was done under three concave die round comers 100°, 110°, 120° and four kinds of routes A, Ba, Bc, C. The experiment discovers that the AZ91 magnesium alloy with the ECAP can extrude the complete test specimen without the crack in macroscopic contour at die temperature 380℃. After several time ECAP, the massive ultra-fine grains appear in the material. When the die round comer is 100°, pressing by the C route, with the deformation times increases, its refinement process is more stable, the refinement effect is best. Through 4 times extrusion, the grain mean diameter is possible to achieve 3 μm.
出处
《热加工工艺》
CSCD
北大核心
2009年第5期68-70,共3页
Hot Working Technology
基金
陕西理工学院科研项目资助(SLG0728)
关键词
等通道转角挤压
AZ91
挤压路径
挤压道次
equal channel angular pressing （ ECAP）
AZ91 aolly
squeeze route
squeeze-pass
