变质高铝锌合金的铸态塑韧化机理  

Mechanism of Ductility Modification of High Aluminum Cast ZA-alloy

作　　者：徐晓峰[1] 倪锋[1] 魏世忠[1] 张柯柯[1] 刘宝弟 

机构地区：[1]洛阳工学院材料科学与工程系,洛阳471039 [2]广州天河安强新型合金厂,广州510075

出　　处：《材料开发与应用》2000年第3期8-11,共4页Development and Application of Materials

基　　金：河南省自然科学基金资助项目!(974040100)

摘　　要：对未变质处理和经B、Ti、Zr变质处理的二元Zn Al合金 (w(Al)为 2 8.4% )的晶粒度与力学性能之间的关系进行了分析。结果表明 ,高铝锌合金的铸态塑韧性与其晶粒度没有明显的联系。断口显微分析、X射线衍射分析和微区能谱分析的结果表明 ,B、Ti。The relations between the grain size and the mechanical properties of high aluminum cast ZAalloys (w(Al) =28.4%) with/without B, Ti and Zr were statistically analyzed. It is showed that there isn't any notable interrelationship between the grain size and the ductility of the alloy. The microstructure, Xray diffraction and microprobe analyses for the fracture surfaces of the alloy were carried out. The results indicated that the remarkable increase of the ductility of ascast high aluminum ZA alloy modified with B, Ti and Zr is attributed to the elimination of interdendrite porosity and the lessening of dendritic segregation of preeutectic aluminumrich phase.

关 键 词：高铝锌合金 变质处理 塑韧化机理 铸态 塑韧性 

分 类 号：TG146.21[一般工业技术—材料科学与工程]