工程科学学报2017，Vol.39Issue(7)：1041-1046,6.DOI:10.13374/j.issn2095-9389.2017.07.009
挤压铸造零件沿流程方向的成分偏析及组织偏聚
Microstructure and composition segregation along the fluidity length of aluminum alloy in squeeze casting
摘要
Abstract
This study investigated the spiral line sample of A357 prepared by the squeeze casting (liquid die forging) process and the influence of the fluidity length on the composition segregation and microstructure segregation through chemical composition and metallographic analyses.The results show that the Si and Mg mass fractions of the start and the end of the spiral line sample along the flow length are greater than that in the middle of the spiral line sample.The initial grain size of α first increases, then decreases with the increase of the fluidity length.Meanwhile, the phase rate of the primary solid shows a fluctuating change with the increase of the fluidity length.The composition segregation and the microstructure change are caused by the forced flow of the filling liquid in the squeeze casting process.关键词
挤压铸造/流程长度/成分偏析/组织偏聚Key words
squeeze casting/fluidity length/composition segregation/microstructure segregation分类
矿业与冶金引用本文复制引用
郭莉军,邢书明,敖晓辉,郭洪钢..挤压铸造零件沿流程方向的成分偏析及组织偏聚[J].工程科学学报,2017,39(7):1041-1046,6.基金项目
国家国际科技合作专项资助项目(2014DFA53050) （2014DFA53050）
吉林省重点攻关计划资助项目(2013020635GX) （2013020635GX）
