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NbTi/Cu single-core rod and processing method thereof

A processing method and single-core technology, applied in superconducting/high-conducting conductors, the usage of superconducting elements, superconducting devices, etc., can solve the problem of high copper of NbTi/Cu composite wire, achieve low S/D, core wire Good deformation effect

Inactive Publication Date: 2020-04-17
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 overcome the problem of high copper ratio of NbTi / Cu composite wire in the preparation process of NbTi / Cu superconducting composite wire in the above-mentioned prior art, and provide a kind of NbTi / Cu single mandrel and its processing method

Method used

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  • NbTi/Cu single-core rod and processing method thereof
  • NbTi/Cu single-core rod and processing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see figure 1 with figure 2 , a NbTi / Cu single mandrel, the single mandrel includes a copper tube 2, a copper upper cover 1, a copper lower cover 3, a niobium cylinder 4 and a niobium titanium rod 5.

[0042] The niobium cylinder 4 is located in the copper pipe 2 , and the outer wall of the niobium cylinder 4 is welded to the inner wall of the copper pipe 2 .

[0043] The niobium-titanium rod 5 is located in the niobium cylinder 4 , and the outer wall of the niobium-titanium rod 5 is welded to the inner wall of the niobium cylinder 4 .

[0044] The bottom of the copper upper cover 1 is provided with a first flange 11 for being embedded into the copper tube 2 , and the top of the copper lower cover 3 is provided with a second flange 31 for being embedded into the copper tube 2 .

[0045] One end of the copper tube 2 is welded with the copper upper cover 1 , and the other end of the copper tube 2 is welded with the copper lower cover 3 .

[0046] The outer diameter of ...

Embodiment 2

[0052] A kind of processing method of NbTi / Cu single mandrel, described this processing method specifically comprises the following steps:

[0053] S1: Process the blank of the copper tube 2 into a copper tube 2 with an outer diameter of Φ150-Φ270 mm, a wall thickness of 8-20 mm, and a length of 400-900 mm.

[0054] The copper rod blank is processed into a copper upper cover 1 and a copper lower cover 3 with an outer diameter of Φ150-Φ270 mm and a length of 30-80 mm.

[0055]A niobium plate with a thickness of 1-2 mm and a length of 300-800 mm is rolled on a roll machine into a niobium tube 4 with an outer diameter of Φ130-Φ250 mm.

[0056] Then the copper tube 2, the copper upper cover 1, the copper lower cover 3, the niobium cylinder 4 and the niobium-titanium rod 5 are pickled.

[0057] S2: Assemble the copper tube 2, copper upper cover 1, copper lower cover 3, niobium tube 4 and niobium-titanium rod 5 in S1 to form a NbTi / Cu single-core sheath, and try to ensure that the ...

Embodiment 3

[0065] A kind of processing method of very low copper ratio NbTi / Cu single mandrel, specifically comprises the following steps:

[0066] S1: Copper cladding with an outer diameter of Φ150-Φ270mm, a wall thickness of 8-20mm, and a length of 400-900mm, and a copper upper cover 1 and a copper lower cover 3 of Φ150-Φ270mm, and a length of 30-80mm, winding The niobium cylinder 4 with a thickness of 1-2mm and a length of 300-800mm is formed with an outer diameter of Φ130-Φ250mm, and then the copper sheath, copper upper cover 1, and copper lower cover 3 are pickled with 20-50% nitric acid aqueous solution , The niobium-titanium rod 5 and the niobium cylinder 4 are pickled with a mixed aqueous solution of 10-40% nitric acid and hydrofluoric acid.

[0067] S2: if figure 1 with figure 2 As shown, first put the niobium tube 4 on the surface of the niobium-titanium rod 5, then gently put the copper tube 2 on the outside of the niobium tube 4, use tooling to pull the niobium-titanium ro...

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Abstract

The invention discloses an NbTi / Cu single-core rod. The single-core rod comprises a copper pipe, an upper copper cover, a lower copper cover, a niobium cylinder and a niobium-titanium rod, wherein theniobium cylinder is located in the copper pipe, and the outer wall of the niobium cylinder is welded to the inner wall of the copper pipe; the niobium-titanium rod is positioned in the niobium cylinder; the outer wall of the niobium-titanium rod is welded with the inner wall of the niobium cylinder; one end of the copper pipe is welded with the upper copper cover, and the other end of the copperpipe is welded with the lower copper cover; the outer diameter phi of the copper pipe is 150-270mm, the wall thickness of the copper pipe is 8-20mm, and the length of the copper pipe is 400-900mm; thelengths of the upper copper cover and the lower copper cover are respectively 30-80mm; the outer diameter phi of the niobium cylinder is 130-250 mm. By designing a new ingot type and reducing the thickness of the copper sheath, the copper ratio of the single-core rod for the composite wire is reduced, the problem that an existing NbTi / Cu composite wire is high in copper ratio is solved, and finally the high-performance NbTi / Cu composite wire with the extremely-low copper ratio of 0.6, S / D (0.0452) and good core wire deformation is obtained.

Description

technical field [0001] The invention belongs to the technical field of superconducting wire processing, and relates to a NbTi / Cu single mandrel and a processing method thereof Background technique [0002] With the development of superconducting technology, NbTi / Cu superconducting wires have been widely used in large scientific devices (ITER), magnetic resonance imaging systems (MRI), magnetron pulling single crystal silicon magnets (MCZ), etc., superconducting wires Stable performance is the key to ensure the normal operation of the magnet. Among them, NbTi / Cu superconducting wires include Monolith and Wire in Channel (WIC). Monolith superconducting wires are mainly prepared by drilling methods, while WIC superconducting wires are mainly prepared by assembly Processing method and through pipe method. [0003] NbTi / Cu superconducting composite wire is made by assembling single mandrels of different specifications and copper ratios in a certain way, and then cold working. Du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/02
CPCH01B12/02Y02E40/60
Inventor 王瑞龙郭强柳祥秦星刘建伟李建峰刘向宏冯勇张平祥
Owner 西部超导材料科技股份有限公司