NbTi合金棒材锻造工艺的优化研究  

Optimization of NbTi Alloy Bar Forging Process

作　　者：杜予晅[1] 郝芳[1] 付宝全[1] 雷锦文[1] 冯勇[1] 刘向宏[1] 李少强[1] 

机构地区：[1]西部超导材料科技股份有限公司,陕西西安710018

出　　处：《稀有金属材料与工程》2016年第10期2752-2756,共5页Rare Metal Materials and Engineering

基　　金：国家国际科技合作专项(2013DFB50180);陕西省科技统筹创新工程计划项目(2013KTLM-01)

摘　　要：通过模拟仿真(DEFORM计算)结合实际生产,研究了NbTi合金的锻造这一复杂动态的接触过程,得到了NbTi合金锻造组织的演化规律,确定了组织均匀的NbTi合金锻造工艺。结果表明:通过模拟仿真发现,采用小变形量,三分之一边长下镦的方式并增加换向拔长,可使NbTi合金的不同位置的变形较为均匀,大面积消除满砧镦拔带来的变形死区,通过实验验证最终生产出符合技术标准的NbTi合金棒材。与美国华昌公司(ATI)的NbTi合金棒材成分、微观组织和XRE(无损检伤)作对比,发现成分的极差、微观组织的均匀性和无损探伤均优于美国华昌公司生产的NbTi棒材,为NbTi合金的生产提供实际参考。The superconducting materials have been widely used in the high-tech fields, e.g. high-energy physics, controlled thermonuclear fusion, energy storage device and maglev etc. The NbTi alloy as a typical low-temperature superconducting material occupies a very important place. By simulated calculation with DEFORM, the dynamic behavior of the forging process has been studied. Further, combined with practical process, the evolution of the microstructure has been obtained, and the preparation technology of the NbTi alloy bars has been acquired. According to the results of simulated calculation, it indicates that the NbTi alloy is deformed homogeneously under a small deformation range, the 1/3 length press and the reversal stretch, which eliminates effectively the deformation dead zone. This optimized technology used to produce NbTi alloy bars, which is well satisfied with the related requirement, has been perfomed in industrial production.

关 键 词：Nb TI合金 锻造 ATI 超导材料 

分 类 号：TG319[金属学及工艺—金属压力加工]