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首页> 外文期刊>Journal of Materials Science >Liquid metal model experiments on casting and solidification processes
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Liquid metal model experiments on casting and solidification processes

机译：铸造和凝固过程的液态金属模型实验

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This paper is concerned with laboratory studies using liquid metals with T-melt less than or equal to 300degreesC to model the flow of metals in industrial processes. Considering three selected examples the main features of such cold models are described. In the first instance we examine an aluminium alloy investment casting process. The requirement of reducing high flow velocities was achieved by the application of a static magnetic field. Local velocity measurements as well as integrated flow rate determination were carried out using eutectic InGaSn (T-melt = 10degreesC). Secondly, model experiments were performed on the electromagnetic stirring of liquid metals in a cylindrical cavity. We applied a rotating magnetic field (RMF) and a travelling magnetic field and recorded flow maps by means of ultrasonic Doppler velocimetry. With the goal of an efficient 3D-mixing, measurements were made using a combination of both field types with promising results. Thirdly, we report on systematic studies of the effect of an RMF on the solidification of a PbSn alloy. Directional solidification experiments demonstrate the influence of the electromagnetically driven convection on the resulting microstructure. (C) 2004 Kluwer Academic Publishers.
机译：本文与实验室研究有关，该研究使用T熔体小于或等于300摄氏度的液态金属来模拟工业过程中的金属流动。考虑三个选定的例子，描述了这种冷模型的主要特征。首先，我们考察了铝合金熔模铸造工艺。降低高流速的要求是通过施加静磁场来实现的。使用共晶InGaSn（T熔体= 10°C）进行局部速度测量以及确定整体流速。其次，对圆柱腔内液态金属的电磁搅拌进行了模型实验。我们施加了旋转磁场（RMF）和行进磁场，并通过超声多普勒测速仪记录了流量图。为了实现有效的3D混合，使用两种场类型的组合进行了测量并获得了可喜的结果。第三，我们报告了RMF对PbSn合金凝固影响的系统研究。定向凝固实验证明了电磁驱动对流对所得微结构的影响。 （C）2004 Kluwer学术出版社。

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