2A14铝合金作为2xxx系铝合金的代表，在机轮轮毂、航空航天设备连接件中得到广泛应用。 为了获得更 高强韧性的2A14铝合金工件，以变形温度360~450℃、轧制比1.10~1.96斜轧穿孔变形的铸态2A14铝合金为研究对 象，通过502℃/2h固溶+165℃/10h时效处理对比，研究了合金组织和力学性能。 结果表明，进行斜轧穿孔变形后，随 着变形温度与轧制比的增大，合金的原始铸态组织逐渐破碎，再结晶晶粒与锯齿晶界不断增多；晶粒内部小角度晶界密 度不断增大，再结晶占比上升，亚结构和变形晶粒含量下降。 合金在变形温度450℃、轧制比1.96下获得较好的综合力 学性能，各向异性基本消除，强塑积为5824MPa·%。 拉伸断口形貌表明，合金断裂方式随轧制比增大由脆性断裂转变 为韧性断裂。

As a representative type of 2xxx series aluminium alloy, 2A14 aluminium alloy has been widely used in aircraft wheel hubs and aerospace equipment connectors. To achieve higher strength and toughness in 2A14 aluminium alloy components, the focus should be on the as-cast 2A14 aluminium alloy subjected to rotary tube piercing deformation within a temperature range of 360~450 ℃ and a rolling ratio of 1.10~1.96. The microstructure and mechanical properties of the alloy were investigated through comparative analysis after solution treatment (502 ℃/2 h) and aging treatment (165 ℃/10 h). The results indicate that after rotary tube piercing deformation, the original as-cast structure gradually disintegrates with increasing deformation temperature and rolling ratio, accompanied by an increase in recrystallized grains and serrated grain boundaries. The density of low-angle grain boundaries within the grains increases, the proportion of recrystallization increases, and the content of substructures and deformed grains decreases. The alloy exhibits optimal comprehensive mechanical properties at a deformation temperature of 450 ℃ and a rolling ratio of 1.96, with nearly eliminated anisotropy and a strength?ductility product of 5824 MPa·%. Fracture morphology analysis reveals that the fracture mode transitions from brittle to ductile as the rolling ratio increases.