MANUFACTURING METHOD OF Nb3X COMPOUND BASED SUPERCONDUCTING WIRE MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a useful method for manufacturing a lengthwise Nb3X compound based superconducting wire material having high superconducting property by establishing annealing condition for effectively applying surface reduction work when manufacturing the Nb3X compound based superconducting wire material by a jelly roll method. SOLUTION: A roll-shaped laminated body, composed of an Nb-containing sheet, and a sheet composed of element X generating superconducting compound by reacting with Nb, or an alloy containing element X, is inserted in a pipe made of Cu, Cu based alloy or the like, and a surface reduction work is applied thereon. A multi-cored complex material is formed by inserting a plurality of bundled single core complex members obtained by the above in a pipe made of Cu, Cu based alloy or the like, and applying a surface reduction work thereon. The Nb3X compound based superconducting wire material, generating Nb3X based superconducting compound is manufactured by applying a heat treatment to the above multi-cored complex material. The manufacturing method of above material comprises a process of annealing the multi-cored complex material with a temperature and length of time softening the hardened Nb but not generating any compound of Nb and element X, after applying a work until the surface reduction rate of the single core complex member becomes 85% or higher. COPYRIGHT: (C)2006,JPO&NCIPI