Method of manufacturing Nb3Sn superconducting wire.

摘要

A method of manufacturing an Nb3Sn superconducting wire includes the steps of composing a desired number of rods, constituted by a material selected from the group consisting of Nb and an Nb alloy, in a Cu-Sn-based alloy matrix containing 15.1 to 24.6 wt % of Sn, thus forming a composite billet, subjecting the composite billet to hot working, subjecting the composite billet to cold or warm working to reduce a diameter and annealing repeatedly to divide an intermetallic compound phase in the Cu-Sn-based alloy into small pieces, thus obtaining a composite wire, and subjecting the composite wire to predetermined heating to diffuse Sn in Nb. A method of manufacturing an Nb3Sn superconducting wire includes the steps of inserting a multiple of composite wires in a pipe, constituted by a material selected from the group consisting of Cu and a Cu alloy, and composing the multiple of composite wires to form a multi-core composite billet, drawing the multi-core composite billet to obtain a multi-core composite wire, and subjecting the multi-core composite wire to predetermined heating to diffuse Sn in Nb.