Abstract The process chain of die casting and hot extrusion for the fabrication of cohesively bonded aluminum bilayer billets was investigated. It represents an energy- and material-efficient link between casting and forming technologies for the production of load-adjusted lightweight constructions. Commercial aluminum AA7075 and AA6060 were initially jointed by die casting. The influence of various process parameters, such as die temperature and cooling conditions, on the interface formation was analyzed. Remelting and recrystallization processes as well as the diffusion-driven interaction between the joining partners were identified as major bonding mechanisms. As-cast bimetal billets were subsequently post-processed using hot extrusion. The present paper shows the interface evolution over the process chain of casting and massive forming.

中文翻译：

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通过压铸和热挤压生产AA7075/6060铝化合物

摘要 研究了压铸和热挤压制造粘结铝双层坯的工艺链。它代表了铸造和成型技术之间的能源和材料高效链接，用于生产负载调整的轻型结构。商用铝 AA7075 和 AA6060 最初是通过压铸连接的。分析了模具温度和冷却条件等各种工艺参数对界面形成的影响。重熔和再结晶过程以及连接伙伴之间的扩散驱动相互作用被确定为主要的结合机制。随后使用热挤压对铸态双金属坯进行后处理。本文展示了铸造和大块成形工艺链上的界面演变。