采用SEM及TEM对AA3104铝合金在300~500℃的均匀化处理进行了研究。结果表明,随均匀化温度的升高,Mg2Si析出相逐渐增多,而Al Mn Si相在Mg2Si边缘处或基体中也开始形核并析出;当温度达500℃时Al Mn Si弥散相较多,呈棒状在晶粒心部形成,而Mg2Si相主要在晶粒外部形成,随温度的继续升高和保温时间的不断延长析出相尺寸也不断增大。 The homogenization of AA3104 aluminum alloy at 300 ~ 500 ℃ was studied by SEM and TEM. The results show that as the homogenization temperature increases, the precipitation phase of Mg2Si gradually increases, while the Al Mn Si phase also begins to nucleate and precipitate at the edge of Mg2Si or in the matrix. When the temperature reaches 500 ℃, Al Mn Si disperse phase is more, The rod shape is formed in the core of the grain, and the Mg2Si phase is mainly formed outside the grain. As the temperature continues to increase and the holding time continues to increase, the precipitated phase size also increases.