Fabrication of Long-Length ${\rm Nb}_{3}{\rm Al}$ Wire by the Metastable Solid-Solution-Strand Restacking Method
Fabrication of Long-Length ${\rm Nb}_{3}{\rm Al}$ Wire by the Metastable Solid-Solution-Strand Restacking Method
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DOI：
10.1109/tasc.2010.2098833
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发表时间：
2011-06
影响因子：
1.8
通讯作者：
N. Banno;T. Takeuchi;K. Tsuchiya;K. Nakagawa
中科院分区：
文献类型：
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作者：
N. Banno;T. Takeuchi;K. Tsuchiya;K. Nakagawa
本文介绍了两个课题，这两个课题都是针对Nb_3Al导体的产业化。一种是亚稳态固溶体链重堆积法，与电镀技术相比，该方法有望成为一种低成本的铜稳定方法。在本文中，我们主要集中在最近的努力，对长长度的生产。这里的关键点是改善Cu管与重新堆叠的原始股线之间的接触。第二个课题是首次尝试在300米级原丝连续快速加热淬火操作中进行“恒压”控制。在恒流控制下，导线直径的变化导致单位体积功率的变化，从而使加工温度发生变化。通过恒定电压控制，线材直径的变化不会导致每单位体积功率的变化，使得处理温度不会变化，从而提高了纵向性能的均匀性。
This paper describes two subjects, both aimed at the industrialization of Nb3Al conductors. One is the metastable solid-solution-strand restacking method, which is expected to be a low-cost Cu-stabilization method compared with the electroplating technique. In this paper, we mainly focus on recent efforts toward long-length production. The key point here is an improvement of the contact between the Cu tube and the restacked original strands. The second subject is the first attempt at “constant voltage” control in the continuous rapid-heating and quenching operation for 300-m-class precursor wire. With constant current control, changes in the diameter of the wire lead to variations in power per unit volume, so that the processing temperature changes. With constant voltage control, changes in diameter of the wire do not lead to changes in the power per unit volume, so that the processing temperature does not change and thus the uniformity of the longitudinal performance is improved.