CFETR CS模型线圈导体铠甲低温力学性能研究

Study on cryogenic mechanical properties of superconductor for CFETR CS model coil jacket

CFETR CS模型线圈采用超临界氦迫流冷却,超临界氦在导体内部流动时吸收电缆上的热负荷,使得线圈能够保持在低温下安全运行。CFETR CS模型线圈的超导体采用CICC结构,其导体外部铠甲采用氩弧焊填丝焊接连接而成。在线圈运行过程中,导体遭受的巨大电磁载荷主要依靠不锈钢铠甲承受。采用数值模拟与实验研究相结合的方法,研究了导体铠甲在磁体运行过程中的受力情况,并通过常低温拉伸实验,获得了铠甲母材与焊缝4. 2 K力学性能测试。实验结果表明,导体铠甲母材与焊缝试样机械性能,均能满足CFETR CS模型线圈超导体设计要求。

CFETR CSMC is cooled by supercritical He flowed in the conductor to keep the coil in safe operation.The CICC superconductor conduit of CFETR CS model coil was made of stainless steel butt welding with filler wire welding.During the coil operation,electromagnetic force was beared by jacket.The numerical and experimental investigations were used to research the stress distribution of conductor during the operation and acquire the cryogenic mechanical properties of jacket and weld samples in this paper.The results show that the mechanical properties of all test samples can meet the design requirement of CFETR CS model coil conductor.