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对高纯和工业纯二元Ａｌ－７％Ｓｉ亚共晶合金熔体在７００～１２００℃范围内进行过热处理，研究了不同过热温度的熔体在砂型和金属型凝固条件得到的固态显微组织、显微硬度、凝固过程冷却曲线特征参数及宏观晶粒组织。
The solid state microstructure of high purity and industrial pure binary Al-7% Si hypoeutectic alloy was observed in the range of 700 ~ 1200 ℃. The solidification microstructure of melt with different superheat temperatures in sand and metal solidification conditions Microstructure, microhardness, cooling curve characteristic parameters and macrostructure of the solidification process.