AlSi7Mg非枝晶合金半固态重熔加热时的组织演变  

Microstructural Evolution of AlSi7Mg Non-dendritic Alloys During Semi solid Remelting

作　　者：毛卫民[1] 钟雪友[1] 李立强 

机构地区：[1]北京科技大学

出　　处：《铸造》1998年第8期10-12,共3页Foundry

基　　金：国家"863"基金

摘　　要：研究表明：电磁搅拌的ＡｌＳｉ７Ｍｇ非枝晶合金在半固态温区保温时，共晶体首先重熔，团块状α相逐渐演变成球状；保温温度越高，半固态重熔和α相演变过程越快；保温温度过高或保温时间过长时，试样在部分重熔过程中易发生变形。Abstract The microstructural evolution of AlSi7Mg non dendritic alloys during semi-solid remelting has been studied in this paper.The results showed that,when held at semi-solid state,the eutectic in AlSi7Mg alloy stirred by an electronmagnetic field is remelted first and α phases gradually evolve into spheroidal shape.The higher the holding temperature,the faster the semi solid remelting of samples and the α phase evolution process.When the holding temperature is much higher or the holding time is much longer,the samples at partial remelting are susceptible to deformation.

关 键 词：半固态金属 非枝晶合金 铝硅合金 半固态重熔 

分 类 号：TG292[金属学及工艺—铸造] TG249.9