CN217386759U - Internal tin method Nb 3 Multi-core CuNb composite rod for Sn wire - Google Patents
Internal tin method Nb 3 Multi-core CuNb composite rod for Sn wire Download PDFInfo
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- CN217386759U CN217386759U CN202221245264.XU CN202221245264U CN217386759U CN 217386759 U CN217386759 U CN 217386759U CN 202221245264 U CN202221245264 U CN 202221245264U CN 217386759 U CN217386759 U CN 217386759U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention belongs to the technical field of superconducting materials, and particularly relates to an internal tin method Nb 3 The multi-core CuNb composite rod for the Sn wire rod is hexagonal in cross section, 7 Nb core rods uniformly distributed in the center are added, the CuNb composite rod is formed by carrying out hot isostatic pressing and hot extrusion on a CuNb composite ingot, the CuNb composite ingot is composed of 1 oxygen-free copper ingot drilled with 7 round holes, sealing covers at two ends of the oxygen-free copper ingot and 7 Nb rods inserted into the oxygen-free copper ingot, and the 7 round holes are consistent in size and matched with the Nb rods in size. Nb formed finally by the invention 3 Nb core of micro-component in Sn superconducting wireSmaller wire size, formed Nb 3 The reaction of Nb and Sn in the Sn superconducting wire is more sufficient, which is beneficial to Nb 3 The formed superconducting wire has higher critical current density due to the formation of the Sn superconducting phase.
Description
Technical Field
The invention belongs to the technical field of superconducting materials, and particularly relates to an internal tin method Nb 3 The multi-core CuNb composite rod is used for the Sn wire.
Background
Niobium tristin (Nb) 3 Sn) low-temperature superconductor is the most important material for high-field superconducting magnet with the application of more than 10T at present, and has been compared in a high-energy particle accelerator, a nuclear magnetic resonance spectrometer (NMR), magnetic confinement nuclear fusion (ITER) and the likeHas wide application in various fields. The main factors influencing the critical current density of the Nb3Sn superconducting wire are the content of the superconducting phase and the density of grain boundary pinning centers, and in order to improve the current carrying capacity of the Nb3Sn superconducting wire, the content of Nb and Sn in the wire needs to be greatly increased to obtain a high volume fraction of the Nb3Sn superconducting phase.
General Nb 3 The preparation method of the Sn superconducting wire mainly comprises an internal tin method and a bronze method; the former can provide sufficient Sn source, has short processing period and low manufacturing cost, can bear larger transport critical current under high magnetic field, and therefore, the internal tin method Nb is adopted 3 The Sn superconducting wire is the main choice for preparing the superconducting magnet for the high-intensity magnetic field (12T-20T) at present.
Internal tin method Nb 3 The preparation method of Sn mainly comprises two methods, one method comprises the steps of firstly putting Nb ingots into a Cu sheath, welding, extruding and stretching the Nb ingots to obtain CuNb single-core rods, and then assembling the CuNb single-core rods once to obtain the multi-core composite ingot. And the other method is to drill round holes more than 160 holes on an oxygen-free copper ingot to obtain a porous copper ingot, and then insert the Nb rod into the porous copper ingot to obtain a multi-core composite ingot.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art and providing an internal tin method Nb 3 The multi-core CuNb composite rod is used for the Sn wire.
The utility model discloses an interior tin method Nb 3 The multi-core CuNb composite rod for the Sn wire rod is used for manufacturing Nb by an internal tin method 3 The Cu-Nb-Sn composite subcomponent for the Sn wire rod comprises 7 uniformly distributed Nb core rods or Nb-Ti/Nb composite rods, wherein the cross section of the multi-core CuNb composite rod is hexagonal and centered, the CuNb composite rod is formed by hot isostatic pressing or hot extrusion of a CuNb composite ingot, and the CuNb composite ingot is formed by drilling 7 uniform Nb rods in 1 CuNb composite ingotThe steel wire rod comprises oxygen-free copper ingots with uniformly distributed round holes, 7 Nb rods or Nb-Ti/Nb composite rods inserted into the round holes of the oxygen-free copper ingots and copper sealing covers at two ends of the oxygen-free copper ingots, wherein the 7 round holes are matched with the diameter of the Nb rods, and the diameter of the Nb rods is 8-10 mm.
Furthermore, Nb-Ti/Nb composite rods are inserted into the circular holes in the center of the oxygen-free copper ingot, and Nb rods are inserted into the 6 circular holes on the periphery of the oxygen-free copper ingot to form the Cu/Nb-Ti/Nb composite ingot.
Further, the Nb-Ti/Nb composite rod is formed by inserting Nb rods into the Nb-Ti alloy pipe.
Further, the Nb-Ti/Nb composite rod is formed by winding Nb-Ti alloy foil on the Nb rod.
Further, Nb is inserted into a circular hole in the center of the oxygen-free copper ingot 47 And Nb rods are inserted into 6 round holes on the periphery of the Ti rod to form a Cu/Nb-Ti/Nb composite ingot.
Furthermore, the diameter of the central circular hole of the oxygen-free copper ingot is different from the diameter of the circular holes at the periphery of the oxygen-free copper ingot by 1-3mm, and the central circular hole is connected with the Nb-Ti/Nb composite rod or Nb 47 The diameters of the Ti rods are matched.
Compared with the prior art, on the one hand, the utility model discloses a drilling inserts the compound stick of once CuNb of Nb stick shaping multicore on oxygen-free copper ingot, Nb stick diameter is 8-10mm, compares the Nb ingot and packs into the fashioned CuNb single plug of Cu canning into, and the initial grain size of the Nb stick of the invention is littleer, under the circumstances of the compound stick of the hexagonal once CuNb of shaping to the same size, the Nb that the invention finally forms is compound to stick 3 The Nb core wire of the micro-component in the Sn superconducting wire has smaller size, and the formed Nb 3 The reaction of Nb and Sn in the Sn superconducting wire is more sufficient, which is beneficial to Nb 3 The formation of Sn superconducting phase ensures that the formed superconducting wire has higher critical current density; meanwhile, compared with the Nb method adopting another internal tin method in the prior art 3 According to the Sn wire rod preparation method, the number of the drilled holes in the copper ingot is greatly reduced, the drilling difficulty is reduced, the rejection condition of the whole ingot due to the drilling deviation is effectively controlled, and the yield is greatly improved.
On the other hand, the copper ingot is provided with 7 evenly distributed round holes by drillingIs favorable to in Nb 3 Ti element doping is uniformly introduced into the Sn superconductor, and Nb-Ti/Nb composite rods or Nb can be introduced among 6 Nb rods in each primary CuNb composite rod 47 Ti rod, Nb-Ti/Nb composite rod or Nb compared with the prior art 47 The insertion position of the Ti rod is not easy to be mistaken, and Ti element is more easily and uniformly distributed in Nb 3 In the core wire of Sn superconducting wire, Nb is inhibited by introducing Ti element doping 3 The growth speed of crystal grains in the process of heat treatment of the Sn superconductor reduces the size of the superconductor crystal grains, and the formed superconducting wire has higher critical current density.
Drawings
FIG. 1 is a schematic structural view of a porous oxygen-free copper ingot of a multi-core CuNb composite rod for an internal tin method Nb3Sn wire rod according to the present invention;
FIG. 2 is a schematic structural diagram of a multi-core CuNb composite rod for an internal tin method Nb3Sn wire rod.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.
Example 1
Internal tin method Nb 3 The multi-core CuNb composite rod for the Sn wire is used for manufacturing Nb by an internal tin method 3 The Cu-Nb-Sn composite subcomponent for the Sn wire rod is characterized in that the cross section of the multi-core CuNb composite rod is hexagonal and comprises 7 uniformly distributed Nb core rods or Nb-Ti/Nb composite rods, the CuNb composite rod is formed by a CuNb composite ingot through hot isostatic pressing or hot extrusion, the CuNb composite ingot is composed of 1 oxygen-free copper ingot 1 drilled with 7 uniformly distributed round holes, 6 Nb rods 2 inserted into the round holes at the periphery of the oxygen-free copper ingot, 1 Nb-Ti/Nb composite rod 2' inserted into the round hole at the center of the oxygen-free copper ingot and copper seal covers at two ends of the oxygen-free copper ingot, the round holes are respectively matched with the diameters of the Nb rods and the Nb-Ti/Nb composite rods, the diameter of the Nb rods is 8-10mm, and the Nb-Ti/Nb composite rods are formed by inserting the Nb rods into Nb-Ti alloy tubes.
The Nb-Ti/Nb composite rod is formed by inserting an Nb rod into an Nb-Ti alloy pipe.
Or the Nb-Ti/Nb composite rod is formed by winding Nb-Ti alloy foil on the Nb rod.
Example 2
Internal tin method Nb 3 The multi-core CuNb composite rod for the Sn wire is used for manufacturing Nb by an internal tin method 3 The Cu-Nb-Sn composite subcomponent for the Sn wire rod is characterized in that the cross section of the multi-core CuNb composite rod is hexagonal and is provided with 7 uniformly distributed Nb core rods or Nb-Ti/Nb composite rods, the CuNb composite rod is formed by CuNb composite ingots through hot isostatic pressing or hot extrusion, the CuNb composite ingot is formed by 1 oxygen-free copper ingot 1 drilled with 7 uniformly distributed round holes, 6 Nb rods 2 inserted into the round holes at the periphery of the oxygen-free copper ingot and 1 Nb rod inserted into the round hole at the center of the oxygen-free copper ingot 47 The Ti rod and the copper sealing covers at two ends of the oxygen-free copper ingot are formed, and the round holes are respectively connected with the Nb rod and the Nb rod 47 The diameter of the Ti rod is matched, and the diameter of the Nb rod is 8-10 mm.
Example 3
Internal tin method Nb 3 The multi-core CuNb composite rod for the Sn wire is used for manufacturing Nb by an internal tin method 3 The Cu-Nb-Sn composite subcomponent for the Sn wire rod is characterized in that the cross section of the multi-core CuNb composite rod is hexagonal and provided with 7 Nb core rods which are uniformly distributed, the CuNb composite rod is formed by a CuNb composite ingot through hot isostatic pressing or hot extrusion, the CuNb composite ingot is composed of 1 oxygen-free copper ingot 1 drilled with 7 uniformly distributed round holes, 7 Nb rods 2 inserted into the round holes at the periphery of the oxygen-free copper ingot and copper seal covers at two ends of the oxygen-free copper ingot, and the round holes are respectively connected with the Nb rods and the Nb rods 47 The diameter of the Ti rod is matched, and the diameter of the Nb rod is 8-10 mm.
In the above embodiment, the difference between the diameter of the central circular hole of the oxygen-free copper ingot and the diameter of the circular holes around the central circular hole can be 1-3mm, and the central circular hole is connected with the Nb-Ti/Nb composite rod or Nb 47 The diameters of the Ti rods are matched.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (6)
1. Internal tin method Nb 3 The multi-core CuNb composite rod for the Sn wire is used for manufacturing Nb by an internal tin method 3 The Cu-Nb-Sn composite subcomponent for the Sn wire is characterized in that the cross section of the multi-core CuNb composite rod is hexagonal and comprises 7 uniformly distributed Nb core rods or Nb-Ti/Nb composite rods, the CuNb composite rod is formed by a CuNb composite ingot through hot isostatic pressing or hot extrusion, the CuNb composite ingot is composed of 1 oxygen-free copper ingot drilled with 7 uniformly distributed round holes, 7 Nb rods or Nb-Ti/Nb composite rods inserted into the round holes of the oxygen-free copper ingot and copper seal covers at two ends of the oxygen-free copper ingot, the 7 round holes are matched with the diameter of the Nb rod, and the diameter of the Nb rod is 8-10 mm.
2. Internal tin process Nb according to claim 1 3 The multi-core CuNb composite rod for the Sn wire is characterized in that a Nb-Ti/Nb composite rod is inserted into a round hole in the center of the oxygen-free copper ingot, and Nb rods are inserted into 6 round holes on the periphery of the oxygen-free copper ingot to form a Cu/Nb-Ti/Nb composite ingot.
3. Internal tin process Nb according to claim 2 3 The multi-core CuNb composite rod for the Sn wire is characterized in that the Nb-Ti/Nb composite rod is formed by inserting an Nb rod into an Nb-Ti alloy tube.
4. Internal tin process Nb according to claim 2 3 The multi-core CuNb composite rod for the Sn wire is characterized in that the Nb-Ti/Nb composite rod is formed by winding a Nb-Ti alloy foil on a Nb rod.
5. Internal tin process Nb according to claim 1 3 The multi-core CuNb composite rod for the Sn wire rod is characterized in that Nb is inserted into a round hole at the center of the oxygen-free copper ingot 47 And Nb rods are inserted into 6 round holes on the periphery of the Ti rod to form a Cu/Nb-Ti/Nb composite ingot.
6. According toInternal tin process Nb in accordance with one of claims 2 to 5 3 The multi-core CuNb composite rod for the Sn wire is characterized in that the difference between the diameter of a central round hole of the oxygen-free copper ingot and the diameter of round holes at the periphery of the oxygen-free copper ingot is 1-3mm, and the central round hole is connected with the Nb-Ti/Nb composite rod or the Nb 47 The diameter of the Ti rod is matched.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221245264.XU CN217386759U (en) | 2022-05-23 | 2022-05-23 | Internal tin method Nb 3 Multi-core CuNb composite rod for Sn wire |
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| CN202221245264.XU CN217386759U (en) | 2022-05-23 | 2022-05-23 | Internal tin method Nb 3 Multi-core CuNb composite rod for Sn wire |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116475263A (en) * | 2023-06-25 | 2023-07-25 | 西安聚能超导线材科技有限公司 | Preparation method of distributed artificial pinning NbTi superconducting wire |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116475263A (en) * | 2023-06-25 | 2023-07-25 | 西安聚能超导线材科技有限公司 | Preparation method of distributed artificial pinning NbTi superconducting wire |
| CN116475263B (en) * | 2023-06-25 | 2023-09-05 | 西安聚能超导线材科技有限公司 | Preparation method of distributed artificial pinning NbTi superconducting wire |
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