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Numerical modelling of BSCCO powder deformation In the Bi-2223/Ag tape rolling process

机译：Bi-2223 / Ag胶带轧制过程中BSCCO粉末变形的数值模拟

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摘要

The rolling process is one of the key techniques in the large-scale manufacture of Bi-2223/Ag tape. Both the density of superconducting BSCCO powder inside the silver tube after the rolling process and uniformity are essential factors for the quality and performance of the final superconducting fibres. In order to investigate the deformation behaviour of BSCCO powder during the rolling process, a numerical model of Bi-2223/Ag tape deformation is proposed. This deals with the influence of process parameters, rolling diameter and thickness reduction upon the distribution of BSCCO powder density. For a type of 37-filament Bi-2223/Ag tape, the critical current density increases as the thickness reduction increases, while it decreases as the rolling diameter increases. Larger thickness reduction can improve the distribution of BSCCO powder density, but the change of rolling diameter has little influence on this distribution.
机译：轧制工艺是Bi-2223 / Ag胶带大规模生产的关键技术之一。轧制过程后，银管内超导BSCCO粉末的密度和均匀性都是最终超导纤维的质量和性能的重要因素。为了研究BSCCO粉末在轧制过程中的变形行为，提出了Bi-2223 / Ag带变形的数值模型。这涉及工艺参数，轧制直径和厚度减小对BSCCO粉末密度分布的影响。对于37丝Bi-2223 / Ag胶带，临界电流密度随着厚度的减小而增加，而随着轧制直径的增加而减小。更大的厚度减小可以改善BSCCO粉末密度的分布，但是轧制直径的变化对该分布几乎没有影响。

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