Light Metals 2023
Light Metals 2023
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轻金属 2023
DOI：
10.1007/978-3-031-22532-1_131
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Beckwith C
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文献类型：
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作者：
Beckwith C
超声处理可以在没有振动探头的情况下通过具有适当频率的电磁感应来执行，其中可以建立共振条件。这种非接触式方法适用于高温或活性金属合金，可提供熔体纯度和设备耐用性。从溶液中出来的氢气泡通过整流扩散而增长，并且较大的气泡从顶部表面逸出，导致脱气。剩余的小气泡的剧烈破裂有助于晶粒细化。在这项研究中，一个非接触式的“顶线圈”设备的应用程序，以连续铸造通过流槽。共振是通过在线圈两侧放置挡板来实现的。电磁力也会引起强烈的搅拌，增加停留时间。使用时域和频域的方法建模的过程中，所提出的设置的结果进行了比较，获得的数据浸没超声波发生器。精度和敏感性的过程和模型参数进行了讨论。
Ultrasonic processing can be performed without a vibrating probe by electromagnetic induction with a suitable frequency where resonance conditions can be established. This contactless method is suitable for high-temperature or reactive metal alloys providing purity of the melt and durability of the equipment. Hydrogen bubbles coming out of solution grow by rectified diffusion, and larger bubbles escape from the top surface leading to degassing. Violent collapses of the remaining smaller bubbles help grain refinement. In this study, the application of a contactless ‘top-coil’ device to continuous casting via a launder is considered. Resonance is achieved by the positioning of baffles on either side of the coil. Electromagnetic forces also cause strong stirring, increasing residence time. The process is modelled using time domain and frequency domain methods, and results for the proposed setup are compared with data obtained for the immersed sonotrode. Accuracy and sensitivity to process and model parameters are discussed.