AlSi_7Mg枝晶合金半固态加热时的组织演变

Microstructral Evolution of the Dendritic AlSi7Mg Alloy during Semi-solid Remelting

利用电阻炉研究了AlSi_7Mg 枝晶合金半固态加热时的组织演变·研究表明:在(589～597±1)℃下,保温5～120min,初生α枝晶难以完全转化为球状的α相;在较高的半固态加热温度下,若保温时间过长,试样会存在不同程度的变形.

The microstructural evolution during partial remelting of dendritic AlSi Mg alloys was studied with the help of an electrical furnace. The results show that it is diffi- cult to change all the primary α dendrites into the spheroidal α phases, when the dendritic samples of AlSi_7 Mg alloy are remelted under 589 or (597±1)℃ and held on this condition for 5 to 120 min. The results also show that the samples remelted can be deformed under the heavy force, if the holding time is longer under higher temperature.