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通过薄铝层剥离实验及轧制变形区剥离形貌的分析,对4A60铝合金与08Al钢冷轧复合板的初始复合及稳定复合的压下量进行研究。同时,结合ABAQUS有限元数值模拟,提出了一种基于薄膜理论的判定铝钢冷轧复合板初始复合及稳定复合压下量的方法。结果表明,在4A60(铝)-08Al(钢)复合板冷轧过程中,仅当08Al钢表面硬化层破碎至一定宽度时,铝钢才能实现结合。当4A60初始厚度为0.23mm时,复合板初始复合压下量为30%,稳定复合压下量为50%。当08Al钢的初始厚度不变时,随着4A60铝合金初始厚度的增加,达到初始复合与稳定复合所需的压下量也随之增大。压下量为60%,4A60(铝)与08Al(钢)的厚度比为1∶1时,复合板不能达到稳定结合;当厚度比增加至2∶1时,复合板不能实现初始结合。
Through the thin aluminum layer peeling experiment and the analysis of strip morphology in the rolling deformation zone, the initial composite and the stable composite reduction of 4A60 aluminum alloy and 08Al cold-rolled composite plate were studied. At the same time, combined with the ABAQUS finite element numerical simulation, a thin film theory to determine the initial composite aluminum cold-rolled composite plate and composite reduction method. The results show that during the cold rolling of 4A60 (aluminum) -08Al (steel) composite plate, the aluminum steel can be bonded only when the surface hardened layer of 08Al steel is broken to a certain width. When the initial thickness of 4A60 is 0.23mm, the initial composite reduction of the composite board is 30% and the stable composite reduction is 50%. With the initial thickness of 08Al steel unchanged, with the increase of the initial thickness of 4A60 aluminum alloy, the reduction required to achieve the initial composite and stable composite increases. The reduction of 60%, the composite plate can not achieve the stable combination when the thickness ratio of 4A60 (aluminum) to 08Al (steel) is 1: 1. When the thickness ratio increases to 2: 1, the initial bonding can not be achieved.