Abstract A vertical continuous compound casting technology for the production of rotationally symmetric bilayer rods consisting of brass CuZn37 and aluminum AA7075 was developed. The interface of the metallurgically bonded semi-finished products was composed of four intermetallic layers and an anomalous eutectic area of Al2Cu (θ-AlCu), Al solid solution (α-Al), and other intermetallic precipitates. The intermetallic layers were CuZn (β-CuZn), a suggested two-phase region of Al3Cu5Zn2 (τ-AlCuZn) and Cu5Zn8 (γ-CuZn), Al4Cu3Zn (τ′-AlCuZn), and AlCu (η2-AlCu). The correlation between the process parameters casting speed, cladding temperature, and tool tempering and the interface formation was studied. The experimental investigations were accompanied by a numerical FEM analysis. The casting speed and the cladding temperature were found to be key factors, that influence the formation of a cohesion between the joining partners.

中文翻译：

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铜铝双层棒的垂直连续复合铸造

摘要 开发了一种用于生产由黄铜CuZn37和铝AA7075组成的旋转对称双层棒的垂直连续复合铸造技术。冶金结合半成品的界面由四个金属间化合物层和一个由Al2Cu(θ-AlCu)、Al固溶体(α-Al)和其他金属间化合物析出物组成的异常共晶区组成。金属间层为 CuZn (β-CuZn)，建议为 Al3Cu5Zn2 (τ-AlCuZn) 和 Cu5Zn8 (γ-CuZn)、Al4Cu3Zn (τ'-AlCuZn) 和 AlCu (η2-AlCu) 的两相区域。研究了铸造速度、熔覆温度、工具回火等工艺参数与界面形成的相关性。实验研究伴随着数值有限元分析。