Continuous compound casting of rotationally symmetrical Cu-Al-semi-finished products

对金属部件的机械和物理性能的要求越来越高，这是一个挑战。金属复合材料可以将各种金属的特殊性能联合收割机结合到一个部件中。由于铜（Cu）的优异电、热和抗菌性能与铝（Al）的良好电、热性能和低密度相结合，铜-铝-复合材料受到最近的研究。复合材料铸造技术是近年来学术界和工业界研究的热点之一，特别是半成品的连续复合材料铸造技术，在以前的一个项目中，对复合材料的工艺条件、凝固过程和最终性能之间的基本关系进行了实验研究，并建立了预测边界层中相形成的数值模型。在此基础上，开发了一种新型的铝合金连铸铜合金棒材垂直复合铸造工艺。在边界层形成过程中，一个稳健的过程与对冶金机制的理解一样重要。因此，因果分析的过程参数和由此产生的机械性能是这些调查的重点。此外，一个增强的模拟模型来预测在连续复合铸造过程中的工艺条件的依赖所产生的微观结构的开发和validated.The主要目的是产生一个预测模型的化学成分和工艺参数的依赖的复合材料的性能。

The increasing demands on mechanical and physical properties of metallic components are challenging. Metallic composites allow to combine specific positive properties of various metals into one component.Due to the combination of the excellent electrical, thermic and antimicrobial properties of copper (Cu) with the also good electrical and thermic properties and the low density of aluminium (Al), copper-aluminium-composites are subject to recent investigations. One focus of recent academic and industrial studies is on the composite casting technology with a particular interest in continuous composite casting of semi-finished products.In a preceding project the basic correlations between processing conditions, metallurgic processes and resultant properties of the composites have been experimentally investigated and numerical models have been developed to predict the phase formation in the boundary-layers. With this knowledge a new innovative vertical continuous composite casting process is developed to produce Cu alloyed rods recast by Al alloys. A robust process is as essential as the comprehension of the metallurgical mechanisms during the formation of the boundary layer. Therefore cause-and-effect-analysis of the process parameters and the resulting mechanical properties is in the focus of these investigations. Furthermore an enhanced simulation model to predict the resulting microstructure in dependence on the process conditions during continuous composite casting is developed and validated.The main objective of this study is to generate a prognosis model for the properties of the composites in dependence on the chemical composition and the process parameters.