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Method for preparing NbTi/CuNi single core liquidometer line

A liquid level gauge, single-core technology, applied in superconducting/high-conducting conductors, superconducting devices, electrical components, etc., can solve the problems of increasing the use cost of superconducting magnets, low wire resistance, etc., and reduce the consumption of liquid helium , High resistance value, the effect of reducing the cost of use

Active Publication Date: 2019-10-29
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

However, the wire resistance of NbTi / Cu single core wire is small, usually less than 50Ω / m, so that the superconducting coil will have a certain amount of electric power consumption and liquid helium consumption during the current passing process, which will increase the use cost of the superconducting magnet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The invention provides a method for preparing a NbTi / CuNi single-core liquid level gauge line, which specifically includes the following steps:

[0029] 1) Pack NbTi alloy rods into CuNi tubes to make NbTi / CuNi single-core ingots;

[0030] 2) Extruding the NbTi / CuNi single-core billet to obtain a NbTi / CuNi single-core extruded rod;

[0031] 3) The NbTi / CuNi single-core extruded rod is stretched and annealed for multiple times on a stretching machine to make a NbTi / CuNi single-core liquid level gauge line.

[0032] Further, said step 1) packing NbTi alloy rods into CuNi tubes to make NbTi / CuNi single-core ingots, specifically including:

[0033] 1.1) NbTi alloy rods are packed into CuNi tubes;

[0034] 1.2) Both ends of the CuNi tube are welded and sealed with CuNi caps to form a NbTi / CuNi sheath;

[0035] 1.3) Apply graphite lubricant evenly on the surface of the sheath to make a NbTi / CuNi single-core ingot.

[0036] Further, the NbTi alloy rod in the step 1.1) is a...

Embodiment 2

[0047] The present invention also provides a method for preparing a NbTi / CuNi single-core liquid level gauge line, which specifically includes the following steps:

[0048] Step 1. Assemble a Nb47%Ti alloy rod with a diameter of Φ30mm into a Cu10%Ni tube with an outer diameter of Φ50mm. Both ends are welded and sealed with Cu10%Ni caps, and the welding vacuum is -3 Pa, continue to evacuate for 1 hour before welding, the welding current is 35mA, and repeat sealing and welding twice to form a NbTi / CuNi sheath. After welding, evenly apply graphite lubricant on the surface of the sheath, and the temperature of the lubricant is controlled at 60°C to obtain NbTi / CuNi. CuNi single core ingot;

[0049] Step 2. Put the NbTi / CuNi single-core ingot into the induction furnace and heat it to 700°C, hold it for 60 minutes and then extrude it. The extrusion ratio is 6, the diameter of the extrusion die is Φ20mm, and the extrusion speed is 20mm / s. The lubricant lubricates between the ingot an...

Embodiment 3

[0052] Step 1. Assemble a Nb47%Ti alloy rod with a diameter of Φ110mm into a Cu15%Ni tube with an outer diameter of Φ190mm. Both ends are welded and sealed with Cu15%Ni caps, and the welding vacuum is -3 Pa, continue to evacuate for 1 hour before welding, the welding current is 60mA, and repeat sealing and welding twice to form a NbTi / CuNi sheath. After welding, apply graphite lubricant evenly on the surface of the sheath, and the temperature of the lubricant is controlled at 60°C to obtain NbTi / CuNi. CuNi single core ingot;

[0053] Step 2. Put the NbTi / CuNi single core into the induction furnace and heat it to 800°C, hold it for 120 minutes and then extrude it. The extrusion ratio is 10, the diameter of the extrusion die is Φ60mm, the extrusion speed is 15mm / s, and a lubricant is used Lubricate between the billet and the extrusion die, and obtain a NbTi / CuNi single-core extruded rod with a diameter of 60mm after the extrusion is completed;

[0054] Step 3. Stretch the extrud...

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Abstract

The invention belongs to the technical field of superconducting material processing, and relates to a method for preparing a NbTi / CuNi single core liquidometer line. The method includes putting a NbTialloy rod into a CuNi pipe to prepare into a NbTi / CuNi single core billet; performing extrusion on the NbTi / CuNi single core billet to obtain a NbTi / CuNi single core extrusion rod; and preparing a NbTi / CuNi single core liquidometer line after performing multi-time stretching and annealing heat treatment on the NbTi / CuNi single core extrusion rod on a stretcher. Compared with NbTi / Cu single core liquidometer lines, the prepared NbTi / CuNi single core liquidometer line has the following advantages: the resistance value can be higher when the liquid level change of the liquid helium in a superconducting magnet is measured, the change of resistance can be more sensitive, electrical work consumption and liquid helium consumption can be decreased, and the using costs of the superconducting magnet can be reduced; and the uniformity of the resistance at different positions can be higher, the liquid level position of the liquid helium in the superconducting magnet can be accurately measured, and the working efficiency can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of superconducting material processing, and relates to a method for preparing a NbTi / CuNi single-core liquid level gauge wire. Background technique [0002] A low-temperature superconducting magnet is a superconducting wire wound into a solenoid coil, and a certain current is passed through the coil to generate a magnetic field. When the temperature in the coil is close to absolute zero, the internal resistance of the coil is almost zero, and it becomes a superconductor. Once a certain current intensity is charged in the superconducting coil, the current will continue to circulate in the coil to form a stable permanent magnetic field. [0003] In order to maintain a permanent magnetic field, the coil of the superconducting magnet needs to be placed in a liquid helium environment, and the liquid helium in the superconducting magnet coil is consumed to a certain extent during use, and liquid helium needs to be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B12/00B21C37/04
CPCB21C37/045H01B12/00
Inventor 闫凯鹃郭强秦星柳祥王瑞龙朱燕敏严凌霄刘建伟李建峰刘向宏
Owner 西部超导材料科技股份有限公司