In this paper, a simple 24-filament structure Nb₃Al superconducting wire has been firstly prepared by using the jelly-roll Nb/Al composite wire, the reel-to-reel rapid heating and quenching (RHQ), and phase transformation heat treatment. In order to obtain the Nb₃Al long wire with good superconducting properties, various heating current (HC) and wire moving speed (WMS) were used to produce high-quality Nb(Al)_ss supersaturated solid solution during RHQ process; thereafter, the Nb(Al)_ss wire was put into the Cu tube and drawn for preparing the Cu-cladded Nb₃Al wire. The results suggest that for the Nb₃Al wire with the HC 262 A and WMS of 300 mm/s, its onset T_c and layer J_c at 4.2 K and 12 T measured by the transport way reach 17.7 K and 1.58 × 10⁵ A/cm², respectively. The magnetization measurement (M-H) of Nb₃Al wires indicate that the diameter reduction of Nb(Al)_ss solid solution wires after RHQ will significantly improve their grain connectivity and thus J_c properties at the optimal heat treatment conditions. The work suggests the simple-structured Nb₃Al superconducting wire is promising to the practical high-field magnet application.

本文首先采用胶卷Nb / Al复合线材，线对线快速加热淬火（RHQ）和相变热处理工艺制备了一种简单的24线结构Nb ₃ Al超导线。 。为了获得具有良好超导性能的Nb ₃ Al长丝，在RHQ工艺中使用各种加热电流（HC）和线移动速度（WMS）来生产高质量的Nb（Al）_ss过饱和固溶体。此后，将Nb（Al）_ss线放入Cu管中并拉出以制备覆铜的Nb ₃ Al线。结果表明，对于HC 262 A和WMS为300 mm / s的Nb ₃ Al焊丝，其起始T通过传输方式测得的在4.2 K和12 T下的_{c c}和J _c层分别达到17.7 K和1.58×10 ⁵  A / cm ²。Nb ₃ Al丝的磁化测量（MH）表明，RHQ后Nb（Al）_ss固溶线的直径减小将显着改善其晶粒连通性，从而改善最佳热处理条件下的J _c性能。这项工作表明，结构简单的Nb ₃ Al超导线对实际的高磁场磁体应用很有希望。