3104铝合金铸锭均匀化过程中的溶解析出行为  

Dissolution and precipitation behavior of 3104 aluminum alloy during homogenization

作　　者：张新明[1] 李飞庆[1] 唐建国[1] 徐敏[1] 黄平 郭金龙 

机构地区：[1]中南大学材料科学与工程学院,湖南长沙410083 [2]中铝西南铝板带有限公司,重庆401326

出　　处：《中南大学学报（自然科学版）》2009年第4期909-914,共6页Journal of Central South University:Science and Technology

基　　金：国家重大基础研究资助项目(2005CB623706)

摘　　要：通过电导率测试,扫描电子显微镜、透射电子显微镜观察分析,研究3104铝合金铸锭单级和双级均匀化过程中溶解和析出行为。结果表明:600℃均匀化时,在保温时间1.5～24h范围内,随保温时间的延长,非平衡结晶相逐渐溶解、球化;在450℃均匀化时,在晶内和晶界处析出大量含Mn第2相,但锭坯中的骨骼状和片状的非平衡结晶相仍存在;600℃/12h+450℃/12h双级均匀化后,锭坯中初生相和析出相的第2相粒子均匀分布,初生第2相粒子的平均粒径约为4μm,析出第2相粒径约为0.5μm。The dissolution and precipitation behavior of 3104 aluminum alloy during single- and two-step homogenization was investigated by means of electrical conductivity measurement, scanning electron microscopy and transmitted electron microscopy. The results show that when the alloy is homogenized at 600 ℃C, the coarse non-equilibrium constituent particles are gradually dissolved and become spherical shape in holding time for 1.5-24 h. A large number of Mn-rich precipitates in the grains and at the boundaries are observed at 450 ℃, but the coarse non-equilibrium constituent particles still remain. Through the two-step homogenization treatment （600 ℃/12 h＋450 ℃ /12 h）, the primary phase particles and the precipitates are distributed uniformly in the ingot alloy, the average diameter of the primary phase particles is about 4 μm, and that of the precipitates is about 0.5 μm.

关 键 词：3104铝合金 均匀化 溶解 析出 

分 类 号：TG146.12[一般工业技术—材料科学与工程] TG113.12[金属学及工艺—金属材料]