采用粉末冶金法制备Al-24Si合金，研究了烧结温度（550~610℃）对合金组织、密度和硬度的影响。结果表明：不同温度烧结合金的显微组织均主要由铝相和硅相组成，当烧结温度达到600℃及以上时，组织中还析出了Mn₄Al₁₆Si₃相；当烧结温度低于580℃时，随温度升高，合金组织中铝颗粒之间的间隙数量减少，合金的密度和硬度增大；当烧结温度达到580℃时，铝和硅形成的共晶液相渗入铝颗粒间界面，而在原先液相位置留下较大孔洞，导致合金孔隙率增大，密度和硬度减小；当烧结温度达到590℃时，共晶液相含量增加，填充内部孔隙，导致合金密度和硬度增大。

Al-24Si alloy was prepared by powder metallurgy, and then the effects of sintering temperature (550-610℃) on microstructure, density and hardness of the alloy were studied. The results show that the microstructures of the alloy sintered at different temperatures all consisted of aluminum and silicon phases. When the sintering temperature reached 600℃ and above, Mn₄Al₁₆Si₃ phase was precipitated in the microstrucuture. When the sintering temperature was lower than 580℃, the gap amount between aluminum particles in the alloy microstructure decreased with increasing temperature, and therefore the density and hardness of the alloy were improved. When the sintering temperature reached 580℃, the eutectic liquid phase formed by aluminum and silicon penetrated into the interface between the aluminum particles, leaving large holes in the original location of the liquid phase, resulting in an increase in the porosity of the alloy and a decrease in the density and hardness. When the temperature reached 590℃, the eutectic liquid phase content increased and filled the inner pores, and therefore the density and hardness of the alloy increased.