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Preparation method of ultrafine-core superconducting wire

A technology of superconducting wire and core wire, which is applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., can solve problems such as quenching, and achieve low AC loss, good stability, and good stress. /Effect of strain tolerance feature

Active Publication Date: 2012-10-24
西部超导材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a preparation method of ultra-fine core wire superconducting wire, which solves the problem of "quench" caused by "AC loss" in the operation process of superconducting magnets in the prior art, and improves the superconductivity. Thermal stability of the wire

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Assembly and sealing: 3,000 pieces of Cu / Nb / Al composite rods with a length of 350.0mm, a distance across sides of 2.0mm, and a regular hexagonal cross-section are packed into a Cu-clad tube with a wall thickness of 11.0mm at one time, and then in a vacuum environment, The Cu-clad tube is sealed by electron beam welding to obtain a composite ingot; the Cu / Nb / Al composite rod is made by the following steps: the Al rod is put into the Nb tube, and the cross-sectional area of ​​the Al rod and the Nb tube is equal to The ratio is 1:3, the Nb tube is sealed and then packed into the Cu tube, welded and sealed, and then multi-pass drawing processing is carried out at a rate of 10% per pass and a rate of 5 meters per minute; the Cu tube The thickness is 0.1 times the thickness of the Nb tube, and the outer diameter of the Nb tube is twice the inner diameter;

[0018] Hot extrusion processing: The composite ingot is subjected to isostatic pressing under a pressure of 5000kN, the...

Embodiment 2

[0025] Assembly and sealing: Assemble 1,000 Cu / Nb / Al composite rods with a length of 500.0mm, a distance across sides of 5.0mm, and a regular hexagonal cross-section into a Cu-clad tube with a wall thickness of 11.0mm at one time, and then in a vacuum environment, Adopt the electron beam welding method to seal the Cu cladding tube to obtain the composite ingot; wherein, the Cu / Nb / Al composite rod is made by the following steps: Al-0.1%Cu rod (the ratio of the amount of Al to Cu substance is 1000 :1) Put it into the Nb tube, where the ratio of the cross-sectional area of ​​the Al-0.1% Cu rod to the Nb tube is 1:3, seal the Nb tube and then put it into the Cu tube, weld and seal it, and then deform it by 20% per pass rate and a rate of 10 meters per minute for multi-pass drawing processing; the thickness of the Cu tube is 1 times the thickness of the Nb tube, and the outer diameter of the Nb tube is twice the inner diameter;

[0026] Hot extrusion processing: The composite ingot...

Embodiment 3

[0033] Assembly and sealing: Assemble 2000 Cu / Nb / Al composite rods with a length of 300.0mm, a distance across sides of 3.60mm, and a regular hexagonal cross-section into a Cu-clad tube with a wall thickness of 11.0mm at one time, and then in a vacuum environment, Electron beam welding is used to seal the Cu cladding tube to obtain a composite ingot; wherein, the Cu / Nb / Al composite rod is made by the following steps: Al-5%Ag rod (the amount of Al element and Ag element ratio of 20:1) into the Nb tube, wherein the ratio of the cross-sectional area of ​​the Al-5%Ag rod to the Nb tube is 1:3, the Nb tube is sealed and then put into the Cu tube, welded and sealed, and then each pass 15% deformation rate and a rate of 5 meters per minute are drawn for multiple passes; the thickness of the Cu tube is twice the thickness of the Nb tube, and the outer diameter of the Nb tube is twice the inner diameter;

[0034] Hot extrusion processing: the composite ingot is subjected to isostatic p...

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Abstract

The invention relates to the field of superconducting materials, in particular to a preparation method of an ultrafine-core superconducting wire. The preparation method comprises the following steps of: assembling and sealing, hot extruding, manufacturing sub components, manufacturing and secondarily assembling a composite rod, drawing the composite rod, thermally treating the composite rod, etc. The quantity of total core wires of the superconducting wire reaches 106-107 through processes of double assembly of large quantities of core wires, hot extrusion, cold drawing, etc., Cu with good electrical / thermal conducting performance is used as a stable base body, and an Nb3Al superconducting wire with extremely low AC loss and extremely good stability is obtained.

Description

technical field [0001] The invention relates to a method for preparing a wire, in particular to a method for preparing a superconducting wire. Background technique [0002] Fully superconducting controllable magnetic confinement thermonuclear fusion energy (tokamak) power generation technology is one of the strategic new energy technologies for the sustainable development of mankind in the future. It is precisely because of the advantages of abundant resources and environmental friendliness that controllable nuclear fusion energy is recognized as the most effective ideal energy source that is most likely to solve the future global energy crisis and promote the sustainable development of human society. At present, the launch of the International Thermonuclear Experimental Reactor Program (ITER) participated by many countries is of great significance to promote the development of basic science and engineering technology of controllable fusion energy. In November 2006, my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/00H01B12/00
CPCY02E40/64Y02E40/60
Inventor 潘熙锋闫果王大友李超刘向宏冯勇张平祥
Owner 西部超导材料科技股份有限公司
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