【摘要】 采用立弯式连铸技术制备5182铝合金薄板坯，经热处理、热轧和冷轧制备板材。利用金相显微镜（OM）、扫描电镜（SEM）、电子探针分析仪（EPMA）、X射线衍射仪（XRD）等分析测试方法对比分析有、无均匀化热处理的铸坯、热轧和冷轧板材微观组织及性能差异，探究影响板材性能差异的因素。结果表明，经立弯式连铸技术制得薄板坯晶粒均为细小的等轴晶，均匀化热处理有效消除了非平衡凝固产生的枝晶偏析，使部分处于亚稳态的Al₆（Fe,Mn）相发生转变，析出α-Al（Fe,Mn）Si相，并降低轧制织构强度。经均匀化处理的板材伸长率和成形性能略有提高，但抗拉强度由382～396 MPa下降到368～374 MPa。更多还原

【Abstract】 5182 aluminum alloy sheet billets were fabricated by vertical bending continuous casting technology, and heat treatment, hot rolling, and cold rolling were conducted to prepare plate. The microstructure and performance differences of ingots, hot-rolled and cold-rolled plates before and after homogenization heat treatment were comparatively analyzed using optical microscopy（OM）, scanning electron microscopy（SEM）, electron probe microanalysis（EPMA）, X-ray diffraction（XRD）, and other analytical methods, and the influence factor was investigated. The results reveal that sheet billets fabricated by vertical bending continuous casting are composed of fine equiaxed grains. Homogenization heat treatment effectively eliminates dendrite segregation caused by non-equilibrium solidification, leading to the transformmation of metastable Al₆（Fe,Mn） phases to α-Al（Fe,Mn）Si precipitates, thus reducing strength of rolling texture. The elongation and formability of plates after homogenization treatment are slightly enhanced, whileh tensile strength is decreased from 382～396 MPa to 368～374 MPa.更多还原