Method for optimizing processing uniformity of Bi2212 wire rod through gradient assembly

A technology of bi2212 and uniformity, which is applied in the field of wire processing, can solve the problems of poor synergistic deformation of wire rods, and achieve the effects of low cost, strong implementability, and simple operation

Pending Publication Date: 2022-07-01
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the processing technology of the drawing itself, the drawing axial stress of the inner and outer rings of the wire has an intrinsic difference in the drawing axial stress of the inner ring and the outer ring, resulting in poor co-deformability of the inner and outer ring wires

Method used

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  • Method for optimizing processing uniformity of Bi2212 wire rod through gradient assembly
  • Method for optimizing processing uniformity of Bi2212 wire rod through gradient assembly
  • Method for optimizing processing uniformity of Bi2212 wire rod through gradient assembly

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] This embodiment includes the following steps:

[0034] Step 1, according to the conventional processing technology of Bi2212 wire, prepare Bi2212 secondary wire with silver ratio of 2.12, 2.02 and the same cross-sectional shape and size;

[0035] Step 2. Use 1 silver rod with the same cross-sectional shape and size as the Bi2212 secondary wire prepared in the first step as the inner core, and arrange 6 Bi2212 secondary wires with a silver-to-super ratio of 2.12 prepared in the first step. The outer periphery of the inner core forms an inner ring, and 12 Bi2212 secondary wires with a silver-to-super ratio of 2.02 prepared in step 1 are arranged on the outer periphery of the inner ring, and then the whole is put into the tertiary casing to obtain a secondary assembly composite;

[0036] In step 3, the secondary assembly composite obtained in step 2 is drawn for multiple times to obtain Bi2212 wire rod with a diameter of 2.02 mm.

Embodiment 2

[0044] This embodiment includes the following steps:

[0045] Step 1, according to the conventional processing technology of Bi2212 wire, prepare Bi2212 secondary wire with silver ratio of 2.25, 2.08 and the same cross-sectional shape and size;

[0046] Step 2. Use 1 silver rod with the same cross-sectional shape and size as the Bi2212 secondary wire prepared in the first step as the inner core, and arrange 6 Bi2212 secondary wires with a silver-to-super ratio of 2.25 prepared in the first step. The outer periphery of the inner core forms an inner ring, and 12 Bi2212 secondary wires with a silver-to-super ratio of 2.08 prepared in step 1 are arranged on the outer periphery of the inner ring, and then the whole is put into the tertiary casing to obtain a secondary assembly composite;

[0047] In step 3, the secondary assembly composite obtained in step 2 is drawn for several times to obtain Bi2212 wire rods with a diameter of 1.00 mm.

Embodiment 3

[0055] The difference between this embodiment and Embodiment 2 is that in step 3, a Bi2212 wire with a diameter of 0.81 mm is obtained by drawing for many times.

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Abstract

The invention discloses a method for optimizing processing uniformity of a Bi2212 wire rod by gradient assembly, which is characterized in that in a secondary assembly process of a conventional processing technology of the Bi2212 wire rod, a gradient assembly method is adopted, and Bi2212 secondary wires are arranged circle by circle from an inner circle to an outer circle according to a silver super-ratio gradient reduction rule. By designing a gradient assembly process of Bi2212 secondary lines with different silver super ratios, a special gradient structure with a high silver super ratio Bi2212 secondary line on the inner ring and a low silver super ratio Bi2212 secondary line on the outer ring is formed, the plastic deformation of the Bi2212 secondary lines from the inner ring to the outer ring and the matching property of the plastic deformation of the Bi2212 secondary lines from the inner ring to the outer ring and the axial stress of the Bi2212 secondary lines from the inner ring to the outer ring are adjusted, the cooperative deformation of the Bi2212 secondary lines from the inner ring to the outer ring is improved, and the mechanical property of the Bi2212 secondary lines from the inner ring to the outer ring is improved. The processing uniformity of the Bi2212 wire rod is optimized from the intrinsic aspect, and the method has good application advantages and engineering prospects in the processing process of the Bi2212 wire rod.

Description

technical field [0001] The invention belongs to the technical field of wire processing, and in particular relates to a method for optimizing the processing uniformity of Bi2212 wire by gradient assembly. Background technique [0002] The excellent macroscopic current-carrying properties of Bi2212 high-temperature superconducting wires are the premise that they can be applied to large-scale high-field magnets, and the overall processing uniformity and the stability of current-carrying properties in the long wire are the keys to their engineering applications. The good processing uniformity of Bi2212 wire is one of the key factors to ensure the stability of the macroscopic current-carrying performance of Bi2212 long wire. At the same time, the good processing uniformity of the wire is also the reason that the wire does not leak during high pressure heat treatment, especially point leakage. Important guarantee. Therefore, the good processing uniformity of Bi2212 wire is of gre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L39/24
CPCH10N60/0268H10N60/0801
Inventor 李珍宝刘国庆姚凯焦高峰
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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