高性能内锡法Nb_3Sn超导股线可用于国际热核聚变反应堆(ITER)磁体,股线加工过程中的断线问题是股线制备的关键技术之一,在股线的Sn组元中添加适量的Ti不但能够提高Sn的强度利于股线的长线加工;同时Ti元素的添加还可以提高热处理中Nb_3Sn的成相速度,降低晶粒尺寸,提高股线的电磁特性.本文介绍了满足Nb_3Sn超导股线制备要求的Sn-Ti合金的制备技术,分析了不同浇铸温度对铸锭的影响,对比了加工中Sn-Ti合金的微观组织变化,为我们制备满足ITER要求的Nb_3Sn超导股线提供了重要的保障.
The Nb_3Sn multi-filaments by internal Tin process can be used for the International Thermal-nuclear Energy Reactor (ITER), the fraction of the strands is one of the key problems during the wire drawing process.The mechanical strength of Tin can be improved by the adding Titanium into the Tin of the strands, and it will be benefit for the strands drawing, furthermore, it is useful to improve the superconducting properties of strands in the high magnetic field. In this paper, the Sn-Ti alloy was investigated, such as the effect of different casting temperature and the change of microstructure during the Sn-Ti alloy worked The Sn-Ti alloy can be used in fabricating internal Tin strands for ITER, and it is important for fabricating the eligibility Nb_3Sn strands for ITER.
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