【作者】 弭光宝； 薛克敏； 张早明； 李辉；

【Author】 Mi Guangbao Xue Kemin Zhang Zaoming Li Hui (School of Materials Science and Engineering, HeFei University of Technology 230009)

【机构】 合肥工业大学材料科学与工程学院；

【摘要】 采用AlSi9Mg合金为试验原料,通过改变、控制浇注温度和半固态保温时间,研究了近液相线区不同温度、不同保温时间下半固态合金的组织演变规律及成因。结果表明:随着保温时间的延长,合金固相显微组织逐渐从最初的树枝晶经蔷薇状形态向颗粒状晶粒转变。比较而言,在605℃保温30～40min时,得到的细小、均匀、圆整的颗粒状非枝晶组织满足半固态加工要求。更多还原

【Abstract】 The microstructure evolution of ZL104 by heat holding above the liquidus temperatures and the reason were investigated.The result indicates that: with increasing holding time ,the growth morphology changes gradually from initial dendrites to sphercial via rosettes, the fine and homogeneous non-dendritic solid grains can be obtained by holding 30~40min at 610℃, and fit for the requirements of Semi-Solid Metal Processing.更多还原