往复挤压Mg-4Al-2Si合金晶粒尺寸稳定性  

Grain size stability of Mg-4Al-2Si alloy prepared by reciprocating extrusion

作　　者：王英[1] 崔红保[1] 黄丹[1] 郭学锋[1] 邓辉[1] 田树科[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454003

出　　处：《金属热处理》2012年第9期55-57,共3页Heat Treatment of Metals

基　　金：河南省科技计划项目(102102210031);河南省教育厅自然科学研究计划项目(2010A430008)

摘　　要：对铸态Mg-4Al-2Si合金经4道次往复挤压后,在长时间保温条件下晶粒尺寸的稳定性进行了研究。结果表明,随保温时间延长,Mg-4Al-2Si合金晶界及晶内析出相的数量变化不大,平均晶粒尺寸逐渐增大。尺寸在15μm以下的晶粒数量呈下降趋势,而尺寸超过15μm的晶粒所占比例则逐渐增多。Grain size stability of Mg-4A1-2Si alloy prepared by reciprocating extrusion and longtime holding was studied. The results show that extending holding time has little effect on the number of precipitation phase on grain boundary and intragranular of Mg-4A1-2Si alloy, and the grain size increases gradually, the grain size smaller than 15 μm reduces while the grain size larger than 15μm increases gradually.

关 键 词：MG-4AL-2SI合金 往复挤压 晶粒尺寸 稳定性 

分 类 号：TG142.33[一般工业技术—材料科学与工程]