预变形量对7A09铝合金半固态组织的影响研究  

Influence of Pre-deformation on Semi-solid 7A09 Aluminum Alloy

作　　者：雍艺龙[1] 王剑[1] 杨军[1] 李高峰[1] 杨小建[1] 张怀章[1] 

机构地区：[1]中国船舶重工集团公司第十二研究所,陕西兴平713102

出　　处：《热加工工艺》2012年第23期26-27,30,共3页Hot Working Technology

摘　　要：半固态成形技术是一种金属成形的新方法,它具有铸锻工艺的综合优点。利用应变诱导熔化激活法(SIMA法)制备了7A09铝合金半固态坯料,研究了预变形量对7A09铝合金半固态组织的影响。结果表明,在相同条件下,预变形程度越大,晶粒的平均直径越小,其形状系数也越小,且逐渐趋近于1,晶粒形状趋近于球形。Semi-solid state forming technology is a kind of new metal forming method. It has the advantages of integrated casting and forging process. The 7A09 aluminum alloy semi-solid billets were prepared by SIMA （strain induced melt activating） method. The influence of pre-deformation on 7A09 aluminum alloy semi-solid state microstructure was studied. The results show that, in the same condition, when pre-deformation is greater, average grain diameter becomes smaller, and shape coefficient also becomes smaller and gradually approaches 1. Grain＇s shape approaches sphere.

关 键 词：半固态 预变形量 平均直径 形状系数 

分 类 号：TG316.5[金属学及工艺—金属压力加工]