熔炼方式和挤压温度对超导线材阻隔层用铌管材化学成分及组织性能的影响

The Effect of Melting Mode and Extrusion Temperature on Chemical Composition and Microstructure Properties of Niobium Pipe Used for Superconducting Wire Barrier

研究熔炼方式和挤压温度对超导线材阻隔层用铌管材的影响.结果表明,电弧炉熔炼铌管材的晶粒组织优于电子束熔炼管材的,但杂质含量和力学性能相对较差;960℃挤压制备的铌管材的晶粒组织不如450℃挤压制备管材的晶粒组织细小均匀,铌管材晶粒粗大不均匀不利于后期超导线材的加工.

The article researches the effects of melting mode and extrusion temperature on niobium pipe used for ultra traverse barrier layer.The results show that the grain structure of niobium pipe made by arc-melting extrusion is superior to by electron-beam melting process,but its impurity content and mechanical properties are relatively poor;the grain structure of niobium pipe through extrusion process at temperature 960℃is not as fine and uniform as that at temperature 450 ℃,and the non-uniform coarse grain of niobium pipe goes against the post-processing of superconducting wire.