Method for preparing Nb3Al superconducting wire precursor

A technology of superconducting wires and precursors, applied in the usage of superconductor elements, superconducting/high-conducting conductors, cable/conductor manufacturing, etc., can solve problems such as core wire coupling and magnetic flux jumping, and reduce AC loss value, The effect of coupling between suppression

Active Publication Date: 2016-02-03
西部超导材料科技股份有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The object of the present invention is to provide a kind of Nb 3 The preparation method of Al superconducting wire precu

Method used

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preparation example Construction

[0024] A kind of Nb of the present invention 3 The preparation method of Al superconducting wire precursor specifically comprises the following steps:

[0025] Step 1, using Nb rods, pure Ta foil or Ta-Cu-Ta composite foils and Cu tubes to prepare single-core composite rods: centering on Nb rods, Nb foils and Al foils with a thickness ratio of 3:1 were placed on the Nb rods Coil, and then coil 1 to 3 layers of Ta-containing foil as a barrier layer; put the coiled Nb rod into a Cu tube, and perform drawing processing at a rate of 1 to 10 m per minute to obtain Nb / Al / Ta / Cu single-core composite rod or Nb / Al / Ta-Cu-Ta single-core composite rod;

[0026] Step 2, rolling the obtained single-core composite rod into a regular hexagonal hexagonal rod through a rolling process: rolling the single-core composite rod obtained through step 1 into a distance between sides of 1 to 10 mm and a length of 200 to 300 mm regular hexagonal rods, and then corrode Cu on the surface to make Nb-Al / ...

Embodiment 1

[0031] Take the Nb rod with a diameter of 8mm and a length of 300mm as the center, wind a Nb foil with a thickness of 0.3mm and an Al foil with a thickness of 0.1mm, and then roll a layer of Ta foil as a barrier layer. The diameter after winding is 23mm; The coiled Nb rod is packed into a Cu tube with an inner diameter of 24 mm and a thickness of 6 mm, and is drawn at a rate of 1 m per minute to obtain a Nb / Al / Ta / Cu single-core composite rod with a diameter of 10 mm; The Nb / Al / Ta / Cu single-core composite rod is rolled into a regular hexagonal rod with a distance of 1 mm and a length of 200 mm, and then the surface Cu is etched away to obtain a Nb-Al / Ta hexagonal rod; 144 lengths Put a 300mm hexagonal rod into a Cu-clad tube (inner diameter 36mm and thickness 6mm), and seal the Cu-clad tube by welding to obtain a composite ingot; the composite ingot is isostatically pressed under a pressure of 4000kN Processing, and then preheated to 100 ° C, and under the thrust of 4000kN, hot...

Embodiment 2

[0034]Take the Nb rod with a diameter of 8mm and a length of 300mm as the center, wind a Nb foil with a thickness of 0.3mm and an Al foil with a thickness of 0.1mm, and then roll a layer of Ta-Cu-Ta composite foil as a barrier layer, and wind The final diameter is 23mm; the coiled Nb rod is packed into a Cu tube with an inner diameter of 24mm and a thickness of 6mm, and is drawn at a rate of 3m per minute to obtain a Nb / Al / Ta- Cu-Ta single-core composite rod; Nb / Al / Ta-Cu-Ta single-core composite rod is rolled into a regular hexagonal rod with a distance across sides of 6mm and a length of 250mm, and then the surface Cu is etched away to obtain Nb -Al / Ta-Cu-Ta hexagonal rods; put 61 hexagonal rods with a length of 200mm into the Cu cladding tube (36mm inner diameter and 6mm thickness), and seal the Cu cladding tube by welding to obtain a composite billet Ingot: The composite ingot is subjected to isostatic pressing under a pressure of 4500kN, then preheated to 150°C, and under ...

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Abstract

The invention discloses a method for preparing an Nb3Al superconducting wire precursor. The method comprises the steps of preparing a single-core composite rod by means of a Nb rod, a Ta-containing foil and a Cu pipe; rolling a prepared single-core composite rod for forming a hexagonal rod with a regular hexagonal cross section; loading a plurality of prepared hexagonal rods into a Cu packaging pipe and sealing, thereby forming a composite blank ingot; preparing a Cu-packaged composite rod from the prepared composite blank ingot through a heat extrusion processing procedure; and preparing an Nb3Al superconducting wire precursor lead through a plurality of drawing processing procedures. The Nb3Al superconducting wire precursor prepared according to the method of the invention has functions of effectively suppressing coupling between superconducting performance core filaments and remarkably reducing AC loss of a final superconducting wire under a precondition that superconducting performances such as superconducting transition temperature, critical current density and upper critical magnetic field are not ensured.

Description

technical field [0001] The invention belongs to the technical field of preparation of superconducting materials, in particular to a kind of Nb 3 A method for preparing an Al superconducting wire precursor. 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 tech...

Claims

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Application Information

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IPC IPC(8): H01B12/06H01B13/00
CPCY02E40/60
Inventor 王大友潘熙锋闫果侯艳荣崔利军王韵涵刘向宏冯勇张平祥
Owner 西部超导材料科技股份有限公司
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