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采用搅拌摩擦焊结合热轧法制备了全包覆1060/AZ31/1060复合板,通过Deform-3D有限元分析了道次压下量和热轧温度对复合板中间层镁板的边部损伤的影响,并研究了不同退火温度和时间对界面扩散层的影响。结果表明:提高热轧温度、减小单道次压下量有利于降低中间层镁板边部损伤值,提高复合板质量;1060/AZ31/1060复合板经过退火处理后,界面区域发生镁和铝等元素的互扩散,镁铝界面层由机械结合变成冶金结合,靠近AZ31镁合金一侧反应层为Mg_(17)Al_(12)相,靠近铝板一侧为Mg_2Al_3,热处理过程中产生的第二相有Mg_(17)Al_(12)、Mg_2Al_3、Al_5Mg_(11)Zn_4和Al_6Mn相;热处理温度在400℃,在保温时间为8 h条件时,界面扩散层厚度能达到59.2μm。
The fully clad 1060 / AZ31 / 1060 composite plate was prepared by friction stir welding combined with hot rolling method. Deform-3D finite element analysis of the effect of pass reduction and hot rolling temperature on the damage of the magnesium plate in the middle of the composite plate Influence, and studied the different annealing temperature and time on the interface diffusion layer. The results show that increasing the hot rolling temperature and reducing the single pass reduction can reduce the damage value of the magnesium alloy in the middle layer and improve the quality of the composite plate. After the annealing of the 1060 / AZ31 / 1060 composite plate, the magnesium and Aluminum and other elements of the interdiffusion, Mg-Al interface layer by the mechanical combination into a metallurgical bond, near the magnesium alloy AZ31 side of the reaction layer is Mg 17 Al 12 phase near the side of the Mg 2 Al 3, produced during the heat treatment In the second phase, Mg_ (17) Al_ (12), Mg_2Al_3, Al_5Mg_ (11) Zn_4 and Al_6Mn phases were obtained. The thickness of interfacial diffusion layer can reach 59.2μm when the heat treatment temperature is 400 ℃ and the holding time is 8 h.