Method for preparing Nb3Sn superconducting wire by winding process

Abstract

The invention belongs to the technical field of superconducting material processing, and relates to a method for preparing an Nb3Sn superconducting wire by a winding process. The preparation method comprises the following steps: preparing a wound combination formed by an Sn alloy foil, a Cu foil, an Nb foil and a copper rod; putting the wound combination in a first oxygen-free copper tube, and sealing the two ends of the first oxygen-free copper tube to obtain a CuNbSn composite rod; performing hydrostatic extrusion on the CuNbSn composite rod to obtain a blank, drawing the blank, and sizing and cutting the blank to obtain hexagonal CuNbSn sub-components; putting the hexagonal CuNbSn sub-components into a second oxygen-free copper tube, and assembling the hexagonal CuNbSn sub-components according to a close-packed hexagonal form to obtain a final Nb3Sn blank; drawing the final Nb3Sn blank to prepare a finished Nb3Sn precursor wire; and carrying out heat treatment on the finished Nb3Snprecursor wire to prepare the finished Nb3Sn superconducting wire. According to the method, the manufacturing process of the Nb3Sn superconducting wire is simplified, and the Nb / Sn diffusion reactionkinetics conditions are reduced.

Description

technical field

[0001] The invention belongs to the technical field of superconducting material processing, and relates to a winding method Nb 3 A method for preparing a Sn superconducting wire. Background technique

[0002] Niobium tritin (Nb 3 Sn) low-temperature superconducting materials are currently one of the most important materials for the application of high-field superconducting magnets above 10T. Wide range of applications. The inner tin method and the bronze method are currently used to produce Nb 3 Two traditional methods for Sn superconducting wires.

[0003] Inner tin method Nb 3 The manufacturing process of the Sn wire rod is as follows: first make the porous copper ingot, then insert the Nb rod into the porous copper ingot, and process it into a Cu-Nb composite rod through hot isostatic pressing and hot extrusion. Then drill a hole in the center, insert a Sn alloy rod, and then undergo cold working processes such as drawing to obtain the inner tin meth...