NbTi/Cu superconducting composite pipe and preparation method thereof

A composite tube and superconducting technology, which is applied in the manufacture/processing of superconductor devices, superconductor components, etc., can solve the problems of no superconductor size, niobium-titanium alloy content control, etc., and achieve industrial production, simple operation, and technological process simple effect

Inactive Publication Date: 2014-12-10
西安艾菲尔德复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a method for preparing the above-mentioned NbTi / Cu superconducting composite tube, which solves the problem that the existing superconducting composite tube processing technology does not control the size of the superconducting tube and the content of niobium-titanium alloy

Method used

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  • NbTi/Cu superconducting composite pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Step 1. Press the NbTi alloy ingot 2 into the oxygen-free copper tube 1, assemble it into a NbTi / Cu composite ingot, make the NbTi alloy ingot 2 and the oxygen-free copper tube 1 interfere fit, and seal and weld the composite ingot with the oxygen-free copper cover plate 3 both ends. Wherein, the Nb content in the NbTi alloy ingot 2 is 45%, the rest is Ti, and the ratio of the cross-sectional area of ​​the oxygen-free copper tube 1 to the NbTi alloy ingot 2 is 0.5:1;

[0053] Step 2. The NbTi / Cu composite ingot assembled in step 1 is hot-extruded to become a NbTi / Cu composite rod. The hot-extrusion temperature is 500° C., and the extrusion ratio is 9:1;

[0054] Step 3, cold drawing the NbTi / Cu composite rod prepared in step 2, the deformation of the cold drawing pass is 15%, so that its diameter is 20mm;

[0055] Step 4, performing aging heat treatment on the composite rod treated in step 3, the aging heat treatment temperature is 350°C, and the aging heat treatment t...

Embodiment 2

[0060] Step 1. Press the NbTi alloy ingot 2 into the oxygen-free copper tube 1, assemble it into a NbTi / Cu composite ingot, make the NbTi alloy ingot 2 and the oxygen-free copper tube 1 interfere fit, and seal and weld the composite ingot with the oxygen-free copper cover plate 3 both ends. Wherein, the Nb content in the NbTi alloy ingot 2 is 48%, the rest is Ti, and the ratio of the cross-sectional area of ​​the oxygen-free copper tube 1 to the NbTi alloy ingot 2 is 0.8:1;

[0061] Step 2. The NbTi / Cu composite ingot assembled in step 1 is hot-extruded to become a NbTi / Cu composite rod. The hot-extrusion temperature is 580° C., and the extrusion ratio is 11:1;

[0062] Step 3, cold drawing the NbTi / Cu composite rod prepared in step 2, the deformation of the cold drawing pass is 17%, making its diameter 17mm;

[0063] Step 4, performing aging heat treatment on the composite rod treated in step 3, the aging heat treatment temperature is 370°C, and the aging heat treatment time...

Embodiment 3

[0068] Step 1. Press the NbTi alloy ingot 2 into the oxygen-free copper tube 1, assemble it into a NbTi / Cu composite ingot, make the NbTi alloy ingot 2 and the oxygen-free copper tube 1 interfere fit, and seal and weld the composite ingot with the oxygen-free copper cover plate 3 both ends. Wherein, the Nb content in the NbTi alloy ingot 2 is 47%, the rest is Ti, and the ratio of the cross-sectional area of ​​the oxygen-free copper tube 1 to the NbTi alloy ingot 2 is 0.6:1;

[0069] Step 2. The NbTi / Cu composite ingot assembled in step 1 is hot-extruded to become a NbTi / Cu composite rod. The hot-extrusion temperature is 550° C., and the extrusion ratio is 10:1;

[0070] Step 3, cold drawing the NbTi / Cu composite rod prepared in step 2, the deformation of the cold drawing pass is 13%, making its diameter 13mm;

[0071] Step 4, performing aging heat treatment on the composite rod treated in step 3, the aging heat treatment temperature is 390°C, and the aging heat treatment time...

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Abstract

The invention discloses an NbTi/Cu superconducting composite pipe. The outer layer of the composite pipe is made of oxygen-free copper while the inner layer thereof is made of a niobium-titanium superconducting material. The invention also relates to a preparation method of the composite pipe. The preparation method comprises the steps of: pressing an NbTi alloy ingot into the oxygen-free copper pipe to assemble a composite ingot, and sealing and welding the two ends of the composite ingot by using oxygen-free copper cover plates; performing thermal extrusion process on the well-assembled composite ingot to form an NbTi/Cu composite rod; performing cold drawing process on the composite rod to enable the diameter to be 10-20 mm; performing aging heat treatment on the composite rod after the cold drawing; carrying on the cold drawing process of the composite rod after the heat treatment until the needed outer diameter size is obtained; cutting off the composite rod after the cold drawing in a fixed length, carrying out straightening ;process to form an NbTi/Cu composite rod; cutting off the composite rod in a fixed length, and drilling holes with needed diameter from the center of the composite rod along the axial direction until the NbTi/Cu superconducting composite pipe is obtained. The produced NbTi/Cu superconducting composite pipe is suitable for an NbTi superconducting joint, the resistance of the joint can be reduced efficiently, the joint stability and reliability can be improved, and production in batches is facilitated.

Description

technical field [0001] The invention belongs to the technical field of superconducting materials, and relates to a NbTi / Cu superconducting composite pipe, and also relates to a preparation method of the above-mentioned NbTi / Cu superconducting composite pipe. Background technique [0002] Niobium-titanium superconducting magnet is a high-tech instrument and equipment, which has a wide range of applications in nuclear magnetic resonance imaging, mass spectrometers, particle accelerators, superconducting magnetic separators and other equipment. In order to meet the requirements of superconducting magnets for special magnetic field shape and high magnetic field uniformity, superconducting coils in superconducting magnets often need to be arranged in specific spatial positions by superconducting wire windings of multiple specifications according to design requirements. Windings of these different specifications generally need to be connected end to end to make superconducting wir...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/12H01L39/24
Inventor 欧阳海波
Owner 西安艾菲尔德复合材料科技有限公司
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