Preparation method of Ti-doped internal tin method Nb3Sn precursor wire

A technology of precursor and internal tin method is applied in the field of preparation of Ti-doped internal tin method Nb3Sn precursor wire, which can solve the problems of easy disconnection, poor plastic workability, etc. The effect of reducing the processing cost

Active Publication Date: 2020-04-10
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the disadvantages of poor plastic workability and easy wire breakage in the existing methods, and provide a novel Ti-doped inner tin method Nb 3 The preparation method of Sn precursor wire material significantly improves the current inner tin method Nb 3 The plastic processing characteristics of Sn wire rods improve the yield of wire rods

Method used

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  • Preparation method of Ti-doped internal tin method Nb3Sn precursor wire
  • Preparation method of Ti-doped internal tin method Nb3Sn precursor wire

Examples

Experimental program
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Effect test

Embodiment 1

[0025] A kind of Ti-doped inner tin method Nb 3 The preparation method of Sn precursor wire rod specifically comprises the following steps:

[0026] (1) Make a composite rod: Insert a Nb rod with a length of 300 mm and a diameter of 9.8 mm into a Nb-1 wt.% Ti alloy tube with the same length, an outer diameter of 11.8 mm, and a wall thickness of 1.0 mm, and then insert the obtained Nb- The Ti / Nb composite rod is inserted into a hexagonal Cu tube with an inner diameter of 12mm and a distance across sides of H15 mm to form a Cu / Nb-Ti / Nb composite rod;

[0027] (2) Sheath assembly: put 30 Cu / Nb-Ti / Nb composite rods and 7 central Cu rods of the same size above into the copper sheath containing the Nb barrier layer in the closest arrangement, and the copper sheath The inner diameter of the tube is 120 mm, the wall thickness is 15 mm, and the length is 300 mm; then it is sealed by vacuum electron beam welding to obtain (30+7) core Cu-Nb composite cladding blank;

[0028] (3) Making...

Embodiment 2

[0033] A kind of Ti-doped inner tin method Nb 3 The preparation method of Sn precursor wire rod specifically comprises the following steps:

[0034] (1) Make a composite rod: Insert a Nb rod with a length of 450 mm and a diameter of 9.8 mm into a Nb-1 wt.% Ti alloy tube with the same length, an outer diameter of 11.8 mm, and a wall thickness of 1.0 mm, and then insert the obtained Nb- The Ti / Nb composite rod is inserted into a hexagonal Cu tube with an inner diameter of 12mm and a distance across sides of H15 mm to form a Cu / Nb-Ti / Nb composite rod;

[0035](2) Packing assembly: put 90 Cu / Nb-Ti / Nb composite rods and 37 central Cu rods of the same size above into the copper sheath containing the Ta barrier layer according to the closest arrangement, and the copper sheath The inner diameter of the tube is 195 mm, the wall thickness is 15 mm, and the length is 450 mm; then it is sealed by vacuum electron beam welding to obtain (90+37) core Cu-Nb composite cladding blank;

[0036...

Embodiment 3

[0041] A kind of Ti-doped inner tin method Nb 3 The preparation method of Sn precursor wire rod specifically comprises the following steps:

[0042] (1) Make a composite rod: Insert a Nb rod with a length of 400 mm and a diameter of 5.8 mm into a Nb-5 wt.% Ti alloy tube with the same length, an outer diameter of 6.8 mm, and a wall thickness of 0.5 mm, and then insert the obtained Nb- The Ti / Nb composite rod is inserted into a hexagonal Cu tube with an inner diameter of 7 mm and a distance across sides of H8.5 mm to form a Cu / Nb-Ti / Nb composite rod;

[0043] (2) Packing assembly: put 159 Cu / Nb-Ti / Nb composite rods and 61 central Cu rods of the same size above into the copper sheath containing the Ta barrier layer in the most dense arrangement, and the copper sheath The inner diameter of the tube is 160 mm, the wall thickness is 15 mm, and the length is 450 mm; then it is sealed by vacuum electron beam welding to obtain (159+61) core Cu-Nb composite cladding blank;

[0044] (3...

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Abstract

The invention belongs to the technical field of superconducting material processing. The invention relates to a preparation method of a Ti-doped internal tin method Nb3Sn precursor wire. The method comprises the steps that hexagonal Cu/Nb-Ti/Nb composite bars are manufactured, the multiple Cu/Nb-Ti/Nb composite bars and a center Cu bar are arranged in a primary copper sheath containing a barrier layer, and the multi-core composite bars are machined through the procedures of vacuum electron beam welding sealing, hot isostatic pressing, hot extrusion and the like; the multi-core composite bar issubjected to center drilling, Sn or Sn alloy bars are inserted into the multi-core composite bar, Cu-Nb-Sn sub-components are machined, the multiple sub-components are arranged in a secondary copper-clad sleeve, plastic machining such as drawing and rolling is conducted, and finally the Ti-doped Nb3Sn precursor wire with the internal tin method is machined. The Nb3Sn wire rod prepared by the method is not easy to break in the plastic processing process, each performance index is equivalent to each performance index of the wire rod prepared by a conventional method, the rate of finished products of wires is higher, and the preparation cost of the wire rod is lower.

Description

technical field [0001] The invention belongs to the technical field of preparation of superconducting materials, and relates to a Ti-doped inner tin method Nb 3 A method for preparing a Sn precursor wire. Background technique [0002] Niobium tritin (Nb 3 Sn) low-temperature superconductor is currently the most important material for the application of high-field superconducting magnets above 10 T, and has been widely used in many fields such as high-energy particle accelerators, nuclear magnetic resonance spectrometers (NMR), and magnetic confinement nuclear fusion (ITER) . Usual Nb 3 The preparation methods of Sn superconducting wire mainly include the inner tin method and the bronze method; the former can provide sufficient Sn source, the processing cycle is short, the manufacturing cost is low, and it can carry a larger transport critical current under high magnetic field. Therefore, the inner tin Law Nb 3 Sn superconducting wire is currently the main choice for pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/06
CPCH01B12/06Y02E40/60
Inventor 潘熙锋林鹤赵勇
Owner FUJIAN NORMAL UNIV
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