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Preparing technique of NbTiTa/Cu superconducting wire

A preparation process and technology for superconducting wire rods are applied in the field of NbTiTa/Cu superconducting wire rods, which can solve the problems of long NbTiTa/Cu preparation process, difficulty in realization, and high cost, and achieve the advantages of large-scale production and application, reduction of preparation difficulty, high cost, etc. cost reduction effect

Inactive Publication Date: 2008-01-23
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not difficult to conclude that the traditional NbTiTa / Cu preparation process is lengthy and complicated
In addition, since the smelting process of NbTiTa superconducting alloy is not mature so far, the cost of preparing NbTiTa superconducting wire by traditional process is very high, and it is difficult to realize

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The Nb47Ti plate with a thickness of 1.9mm and the Ta plate with a thickness of 0.11mm are stacked alternately, wire-cut into a cylinder of 50×180mm, and pickled together with a copper sheath with an inner diameter of 51×180mm and a Nb barrier layer , after drying for the first complex assembly. The assembled composite sheath is vacuum-sealed, followed by hot isostatic pressing and extrusion. Pickling the NbTiTa / Cu composite rod obtained after extrusion to remove the oxide layer on the surface of the composite body, then drawing the composite body to a hexagonal rod, cutting the hexagonal rod into 61 sections, and then pickling. Use the hexagonal rod and the pickled copper sheath for the second composite assembly, vacuum weld and extrude the assembled composite sheath, then pickle the extruded composite rod and pull it out to the hexagonal rod, cut the hexagonal rod into 78 sections, and pickle; carry out the third complex assembly of the hexagonal rod and the pickle...

Embodiment 2

[0020] The Nb47Ti plate with a thickness of 1.9mm and the Ta plate with a thickness of 0.18mm are stacked alternately, wire-cut into a cylinder of 50×180mm, and pickled together with a copper sheath with an inner diameter of 51×180mm and a Nb barrier layer , after drying for the first complex assembly. The assembled composite sheath is vacuum-sealed, followed by hot isostatic pressing and extrusion. The NbTiTa / Cu composite rod obtained after extrusion was pickled to remove the oxide layer on the surface of the composite, and then the composite was drawn to a hexagonal rod, and then the hexagonal rod was cut into 1003 sections, followed by pickling. Use the hexagonal rod and the pickled copper sheath to assemble the composite body for the second time. The assembled composite sheath is vacuum welded, extruded, and the extruded composite rod is peeled off. Finally, it is pulled NbTiTa / Cu superconducting wire made by pulling and aging heat treatment, its critical current densit...

Embodiment 3

[0023] The Nb57Ti plate with a thickness of 1.9mm and the Ta plate with a thickness of 0.20mm are stacked alternately, wire-cut into a cylinder of 50×180mm, and pickled together with a copper sheath with an inner diameter of 51×180mm and a Nb barrier layer , after drying for the first complex assembly. The assembled composite sheath is vacuum-sealed, followed by hot isostatic pressing and extrusion. Pickling the NbTiTa / Cu composite rod obtained after extrusion to remove the oxide layer on the surface of the composite body, then drawing the composite body to a hexagonal rod, cutting the hexagonal rod into 61 sections, and then pickling. Use the hexagonal rod and the pickled copper sheath for the second composite assembly, vacuum weld and extrude the assembled composite sheath, then pickle the extruded composite rod and pull it out to the hexagonal rod, cut the hexagonal rod into 78 sections, and pickle; carry out the third complex assembly of the hexagonal rod and the pickle...

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Abstract

The invention discloses a preparation technique for a NbTiTa / Cu superconductive wire rod, which is characterized in that: in this technique, a NbTi alloy plate, a Ta plate and a Nb obstruction layer are assembled integrally in a composite after acid washing and cleaning; the NbTi alloy plate and the Ta plate are interlaced alternatively in a copper clad wrap and then processed via vacuum sealing, hot isostatic pressing and hot extrusion; the extruded composite will undergo secondary assembly, vacuum sealing and hot extrusion after acid washing, drawling and cutting; then, undergo ageing heat treatment and drawing, so as to make a NbTiTa / Cu superconductive wire rod with certain wire diameter, core diameter, core number and copper ratio, or; the composite with secondary extrusion will undergo third assembly, vacuum sealing and hot extrusion after acid washing, drawing and cutting; then, conduct ageing heat treatment and drawing for third composite to make NbTiTa / Cu superconductive wire rod. Therefore, the invention is able to simplify the preparation technique of NbTiTa / Cu superconductive wire rod, shorten the wire rod preparation period by 40 per cent and lower down the cost by 30 per cent.

Description

technical field [0001] The invention relates to a preparation process of a superconducting wire, in particular to a process for preparing a NbTiTa / Cu superconducting wire with good superconducting properties by using a NbTi alloy plate and a pure Ta plate. Background technique [0002] With the continuous development of science and technology and social economy, low-temperature superconducting materials such as NbTiTa, NbTi, and Nb3Sn will play an important role in solving energy problems, diagnosis and treatment of human diseases, and physics research. [0003] NbTiTa / Cu superconducting wire is mainly used to prepare high-field magnets. NbTiTa / Cu wire is an alloy superconductor with good plasticity. It is not only easy to process the wire, but also very convenient to prepare the magnet. At the same time, the performance of the NbTiTa / Cu superconducting wire will not degrade during use. The above advantages are not possessed by other superconducting wires, so the developmen...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B12/04H01B12/00
CPCY02E40/641Y02E40/64Y02E40/60
Inventor 马权陈自力卢亚锋周廉吴晓祖王忠俊
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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