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Extrusion preparation process for obtaining iron-based superconducting wire in single pass and product thereof

A technology for iron-based superconductivity and preparation process, applied in the field of metallurgy, can solve the problems of cumbersome preparation process, lengthy time, unsatisfactory superconductivity, etc.

Active Publication Date: 2021-07-06
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects that the existing iron-based superconducting wire cannot be prepared in the extrusion process, resulting in cumbersome preparation process, long time and unsatisfactory superconducting performance, and propose an iron-based superconducting wire The new preparation process can effectively improve the preparation efficiency of iron-based superconducting wires, and at the same time improve the superconducting properties of the wires

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  • Extrusion preparation process for obtaining iron-based superconducting wire in single pass and product thereof
  • Extrusion preparation process for obtaining iron-based superconducting wire in single pass and product thereof
  • Extrusion preparation process for obtaining iron-based superconducting wire in single pass and product thereof

Examples

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Embodiment 1

[0039] An extrusion preparation process for obtaining an iron-based superconducting wire in a single pass, comprising the following steps:

[0040](1) Preparation of superconducting core powder: Ba122 is used as the raw material, and the raw material composition is Ba, K, Fe, As, wherein the mass ratio of Ba:K:Fe:As is 0.6:0.4:2:2, mixed under an inert atmosphere 1. Prepare iron-based superconducting precursor powder by ball milling.

[0041] (2) Preparation of extrusion billet: put the sintered precursor powder into a clean Ag metal tube, the inner diameter of the Ag metal tube is Φ5mm, the outer diameter is Φ8mm, and the two ends of the Ag metal tube are blocked with metal Ag, every 4cm The powder content in the high Ag metal tube is about 2.8g.

[0042] (3) Place the extrusion billet in the extrusion tooling, the structure of the overall extrusion tooling is as follows figure 1 As shown, it includes an extrusion cylinder 1, an extrusion die 2, an extrusion rod 3 and an ex...

Embodiment 2

[0047] An extrusion preparation process for obtaining an iron-based superconducting wire in a single pass, comprising the following steps:

[0048] (1) Preparation of superconducting core powder: mixing and ball milling under an inert atmosphere to prepare iron-based superconducting precursor powder, the raw material composition of the iron-based superconducting precursor powder is Ba, K, Fe, As, wherein, Ba:K:Fe: The mass ratio of As is 0.6:0.5:2:2.

[0049] (2) Preparation of extrusion billet: put the sintered precursor powder into a clean Ag metal tube, the inner diameter of the Ag metal tube is Φ5mm, the outer diameter is Φ8mm, and the two ends of the Ag metal tube are blocked with metal Ag, every 4cm The loading amount of iron-based superconducting precursor powder in the highly Ag metal tube is 2.1g.

[0050] (3) Place the extrusion billet in such as figure 1 In the extrusion tooling with the structure shown, preliminary preheating is carried out, the preheating temper...

Embodiment 3

[0054] An extrusion preparation process for obtaining an iron-based superconducting wire in a single pass, comprising the following steps:

[0055] (1) Preparation of superconducting core powder: mixing and ball milling under an inert atmosphere to prepare iron-based superconducting precursor powder.

[0056] (2) Preparation of extrusion billet: put the sintered precursor powder into a clean Cu metal tube with an inner diameter of Φ5 mm and an outer diameter of Φ8 mm, and plug both ends of the Cu metal tube with metal Cu.

[0057] (3) Place the extrusion billet in the exact same extrusion tooling as in Example 1 for preliminary preheating, the preheating temperature being 200°C.

[0058] (4) A common press is used to apply extrusion force to the extrusion rod 3 to realize vertical forward cold extrusion, and the extrusion speed of the iron-based superconducting wire can be realized by controlling the extrusion speed to 5 mm / s when applying pressure. In this embodiment, the ap...

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Abstract

The invention discloses an extrusion preparation process for obtaining an iron-based superconducting wire in a single pass and a product thereof, and the process comprises the following steps: preparation of an extrusion blank: obtaining iron-based superconducting precursor powder, loading the iron-based superconducting precursor powder into a metal tube, and carrying out plugging to obtain the extrusion blank; and extrusion forming: specifically, extruding the extrusion blank, and the extrusion ratio being 3-18 during extrusion. The preparation efficiency of the iron-based superconducting wire can be effectively improved, and meanwhile the superconducting performance of the wire can be improved.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to an extrusion preparation process for obtaining an iron-based superconducting wire in a single pass and a product thereof. Background technique [0002] Iron-based superconductors have the advantages of high critical transition temperature, small anisotropy, and high upper critical field. They are suitable for a wide range of applications in energy, medical, and large science and engineering fields. They are the most promising new high-temperature superconductors today. High-performance superconducting wire strips are the basis for the practical application of superconducting materials in strong electric and high fields. At present, the powder-in-tube method (Powder-in-tube, PIT method) is generally used for the preparation of iron-based superconducting materials. Made into superconducting wire strips. The transport of iron-based superconducting wires prepared by sheath drawing and rol...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B12/00
CPCH01B13/00H01B12/00Y02E40/60
Inventor 马衍伟韩萌姚超王栋梁杨鹏
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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