-1范圍的熱變形行為，建立了流變應(yīng)力本構(gòu)方程模型，繪制出了二維熱加工圖，確定了最佳熱加工區(qū)域，采用電子背散射衍射（EBSD）和透射電子顯微鏡（TEM）技術(shù)研究了該合金的組織演變規(guī)律。結(jié)果表明：ZL270LF鋁合金的流變應(yīng)力隨變形溫度的升高和應(yīng)變速率的降低而降低，熱變形激活能為309.05 kJ/mol，最優(yōu)熱加工區(qū)為溫度470~530 ℃、應(yīng)變速率為0.01~1 s-1。該合金在熱變形過(guò)程中存在3種不同的DRX機(jī)制，即連續(xù)動(dòng)態(tài)再結(jié)晶（CDRX）、不連續(xù)動(dòng)態(tài)再結(jié)晶（DDRX）和幾何動(dòng)態(tài)再結(jié)晶（GDRX），其中CDRX是ZL270LF鋁合金動(dòng)態(tài)再結(jié)晶的主要機(jī)制。;The hot deformation behavior of ZL270LF aluminum alloy under a strain of 70%, deformation temperatures ranging from 300 °C to 550 °C, and strain rate ranging from 0.01 s-1 to 10 s-1 was studied by hot compression tests. A constitutive equation for flow stress was constructed, and the hot processing map was drawn, thus determining the optimal hot processing region. An electron back scattered diffractometer (EBSD) and a transmission electron microscope (TEM) were used to explore microstructural evolution of the alloy. The results show that the flow stress of ZL270LF Al alloy decreases with increasing deformation temperature and decreasing strain rate. The deformation activation energy is 309.05 kJ/mol, and the optimal processing region is the area where the temperature is from 470 °C to 530 °C and the strain rate is from 0.01 s-1 to 1 s-1. Three different dynamic recrystallization (DRX) mechanisms are involved in the hot deformation process of the alloy, namely continuous dynamic recrystallization (CDRX), discontinuous dynamic recrystallization (DDRX), and geometric dynamic recrystallization (GDRX). Among them, CDRX is the main DRX mechanism of ZL270LF Al alloy."/>