Al-Sb-Mg中间合金对A356合金显微组织的影响  

Effect of Al-Sb-Mg Master Alloy on Microstructure of A356 Alloy

作　　者：李娅珍[1] 赵维民[1] 范学义[1] 林晓娉[1] 王志峰[1] 

机构地区：[1]河北工业大学材料科学与工程学院,天津300130

出　　处：《热加工工艺》2009年第1期26-29,共4页Hot Working Technology

摘　　要：主要研究了Sb和Al-Sb-Mg对A356铝合金显微组织的影响。实验结果表明,在Al-Sb-Mg中间合金中,Sb主要以AlSb和Mg3Sb2化合物的形式存在;Mg对Sb变质A356铝合金有促进作用,AlSb和Mg3Sb2作为异质核心,促进了共晶硅的形核;与Sb变质相比,Al-Sb-Mg能获得更好的变质效果。Al-Sb-Mg变质A356合金经T6热处理之后,α-Al由粗大树枝状变为细小等轴晶状,共晶硅由粗大针片状变为细小颗粒状,且在α-Al基体中均匀分布。The effect of Sb and Al-Sb-Mg on the microstructure of A356 aluminum alloy was investigated. The results show that Sb exists mainly in the form of AlSb and Mg3Sb2 in the Al-Sb-Mg master alloy. Mg enhances the effect of modification of Sb for A356 aluminum alloy. AlSb and Mg3Sb2 act as the heterogeneous nucleus for eutectic silicon. Al-Sb-Mg master alloy for modification is better than Sb. After A356 alloys modified by Al-Sb-Mg undergoes T6 treatment,the dendritic α-Al phase transforms to fine equiaxed parti...

关 键 词：Al-Sb-Mg中间合金 SB A356 变质 组织 

分 类 号：TG146.21[一般工业技术—材料科学与工程]