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Sub-rapid Solidification Study by Using Droplet Solidification Technique

机译：利用液滴凝固技术进行副快速凝固研究

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Droplet solidification technique is important with respect to the fundamental study of strip casting given the common conditions of direct contact between cooling mold and solidifying metal. In this study, an improved droplet solidification technique has been developed for the in situ observation of the sub-rapid solidification phenomena of metal droplets impinging onto the water-cooled copper substrate. The heat transfer rates were calculated by the inverse heat conduction program (IHCP), according to the responding temperatures' gradient inside the cooling mold. Meanwhile a charge coupled device (CCD) camera was placed beside the bell jar aimed to record the whole melting and solidification process of the steel sample, which also allowed the determination of the final wetting angel, during the dipping tests. Moreover, it was found that the heat transfer rate increased with decreasing final contact angle, which means better wetting condition between the liquid sample and the copper substrate.
机译：液滴凝固技术对于带钢铸造的基本研究至关重要，因为冷却模具与凝固金属直接接触的常见条件。在该研究中，已经开发了一种改进的液滴凝固技术，用于原位观察撞击水冷铜基材上的金属液滴的副快速凝固现象。根据冷却模具内的响应温度的梯度，通过反热传导程序（IHCP）计算传热速率。同时，将电荷耦合器（CCD）相机放置在钟罐旁边，旨在记录钢样品的整体熔化和凝固过程，这也允许在浸渍试验期间测定最终润湿天使。此外，发现传热速率随着最终接触角的降低而增加，这意味着液体样品和铜基材之间的更好的润湿状态。

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