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Method for preparing superconducting wire/strip

A technology of superconducting wires and strips, which is applied in the usage of superconducting elements, superconducting/high-conducting conductors, superconducting devices, etc. Solve problems such as annealing processing time, achieve the effects of shortening exposure time, improving core wire quality, and reducing annealing time

Active Publication Date: 2018-11-23
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, long-term annealing will lead to the penetration of external gas into the core wire, the oxidation of the core wire or the volume expansion of the core wire, and the interaction of the chemical components of the core wire will affect the current-carrying performance of the final material; in addition, prolonging the annealing processing time will not Facilitates efficient production of wire / strip

Method used

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  • Method for preparing superconducting wire/strip
  • Method for preparing superconducting wire/strip
  • Method for preparing superconducting wire/strip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] The method of the present embodiment comprises the following steps:

[0046] Step 1. Wash and wind the 55-core silver-coated Bi-2223 round wire with a diameter of 21mm prepared by the powder tube method and wind it on the pay-off reel 1, and then wind the 55-core silver-coated Bi-2223 round wire The starting end passes through the induction coil of the induction coil device 4 through the first guide pulley 3, and then penetrates into the drawing die 7 through the second guide pulley 6 and is clamped on the pulling device 8 of the wire drawing machine to complete the 55-core silver sheath Bi -Assembly of 2223 round wires; the induction coil of the induction coil device 4 is made of copper and has a diameter of 5cm; the materials of the first guide pulley 3 and the second guide pulley 6 are copper, and the first guide pulley 6 must be checked before use. The surfaces of the first guide pulley 3 and the second guide pulley 6 are polished to mirror surface;

[0047] Step 2...

Embodiment 2

[0061] The method of the present embodiment comprises the following steps:

[0062] Step 1. Wash and wind the (37×18+1) core silver alloy sheathed Bi-2212 round wire with a diameter of 21mm prepared by the powder tube method and wind it on the pay-off reel 1, and then wrap the (37×18+ 1) The starting end of the core silver alloy sheathed Bi-2212 round wire runs through the induction coil of the induction coil device 4 through the first guide pulley 3, and then penetrates into the drawing die 7 through the second guide pulley 6 and is clamped in the On the wire drawing machine traction device 8, complete the assembly of the (37 × 18+1) core silver alloy sheath Bi-2212 round wire; the material of the induction coil of the induction coil device 4 is red copper, and the diameter is 3cm; the (37 ×18+1) The structure of the cross-section of the core silver alloy sheathed Bi-2212 round wire is as follows Image 6 shown;

[0063] Step 2: Close the main circuit switch 10 to start the...

Embodiment 3

[0068] The method of the present embodiment comprises the following steps:

[0069]Step 1. Clean and wind the (37×36+1) core silver alloy sheathed Bi-2212 round wire with a diameter of 31mm prepared by the powder tube method and wind it on the pay-off reel 1, and then wrap the (37×36+ 1) The starting end of the core silver alloy sheathed Bi-2212 round wire runs through the induction coil of the induction coil device 4 through the first guide pulley 3, and then penetrates into the drawing die 7 through the second guide pulley 6 and is clamped in the On the pulling device 8 of the wire drawing machine, the assembly of (37×36+1) core silver alloy sheathed Bi-2212 round wire is completed; the material of the induction coil of the induction coil device 4 is copper, and the diameter is 6cm;

[0070] Step 2: Close the main circuit switch 10 to start the wire drawing machine traction device 8, so that the (37×36+1) core silver alloy sheathed Bi-2212 round wire assembled in step 1 ente...

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Abstract

The invention discloses a method for preparing a superconducting wire / strip. The method for preparing the superconducting wire / strip comprises the following steps that 1, a metal package sheathing / ceramic core wire composite wire is wound on a pay-off reel after the metal package sheathing / ceramic core wire composite wire is cleaned, the metal package sheathing / ceramic core wire composite wire penetrates through a first guide pulley, an induction coil device, a second guide pulley and a drawing die in sequence, and the metal package sheathing / ceramic core wire composite wire is clamped on a wire drawing machine drawing device to complete assembling; 2, the wire drawing machine drawing device is started to drive the metal package sheathing / ceramic core wire composite wire to draw; 3, the drawn metal package sheathing / ceramic core wire composite wire is collected, then the assembling and drawing process are repeated, and then the superconducting wire / strip is obtained through heat treatment; and induction annealing and synchronous drawing are carried out on the metal package sheathing / ceramic core wire composite wire during repeated drawing. According to the method for preparing thesuperconducting wire / strip, induction annealing is introduced into the drawing, so that the metal package sheathing of the metal package sheathing / ceramic core wire composite wire rapidly heats up, induction annealing and synchronous drawing are realized, the mechanical properties of the superconducting wire / strip are guaranteed, the core breaking phenomenon is avoided, and the processing uniformity of the superconducting wire / strip is improved.

Description

technical field [0001] The invention belongs to the technical field of superconducting wire / strip preparation, and in particular relates to a preparation method of superconducting wire / strip. Background technique [0002] Due to its special zero-resistance effect and complete diamagnetism, superconducting materials have significant application advantages in electricity, high-energy physics, medical treatment, etc., and have received long-term and extensive attention. At present, according to the structure of materials in practical applications, mainstream superconducting wires / tapes can be divided into two categories, one is film-based superconducting materials such as coated conductors, and YBa 2 Cu 3 o 7 The other type is a multi-core superconducting wire / tape with a metal sheath plus a superconducting core wire structure, with Nb 3 Sn and Bi-2223 are representative. Compared with film-based superconducting materials, multi-core superconducting wires / ribbons have more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/04H01B13/00C21D1/26C21D1/42C21D9/52C21D8/06
CPCC21D1/26C21D1/42C21D8/06C21D9/52C21D9/525H01B12/04H01B13/00Y02E40/60Y02P10/25
Inventor 张胜楠冯建情李成山焦高峰白利锋郝清滨张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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