Preparing method of nickel tungsten base band used for coated conductor

A nickel-tungsten alloy, coated conductor technology, applied in the direction of manufacturing tools, heat treatment equipment, furnace types, etc., can solve problems such as affecting the sharpness of cubic texture, achieve high tensile strength and yield strength, and improve uniformity.

Inactive Publication Date: 2009-08-26
NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the W content exceeds 5 at%, although the strength of the baseband can be further improved, it will significantly affect the sharpness of the cubic texture

Method used

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  • Preparing method of nickel tungsten base band used for coated conductor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A Ni-5at%W pre-alloyed rod was prepared by powder metallurgy, with a total amount of 30 kg. The gross weight of the alloy ingot obtained by smelting twice in a vacuum electric arc furnace is 26 kilograms. After removing the riser and peeling the surface through flaw detection, the net ingot obtained is 21.5 kg. A slab material with a thickness of 25 mm and a width of 120 mm was obtained by forging. After removing the scale on the surface of the forged slab, it was hot rolled at 1200° C. to obtain a plate with a thickness of 8 mm. The pass processing rate of the hot rolling was 25%, and the total processing rate was 68%. The surface of the hot-rolled piece is pickled and then cold-rolled, and the middle is subjected to stress-relief annealing. The annealing temperature is selected at 650°C and kept for 2 hours, and the vacuum degree is 10 -4 Pa. The total processing rate of continuous cold rolling is 97.77%, and the finished base strip has a thickness of 0.08 mm, a wi...

Embodiment 2

[0021] A Ni-5at%W pre-alloyed rod was prepared by powder metallurgy, with a total amount of 30 kg. The gross weight of the alloy ingot obtained by smelting twice in a vacuum electric arc furnace is 26.5 kilograms. After removing the riser and surface peeling through flaw detection, the net ingot obtained is 20 kg. A slab material with a thickness of 25 mm and a width of 120 mm was obtained by forging. After removing the scale on the surface of the forged slab, it was hot rolled at 1200° C. to obtain a plate with a thickness of 8 mm. The pass processing rate of the hot rolling was 25%, and the total processing rate was 68%. The surface of the hot-rolled piece is pickled and then cold-rolled, and the middle is subjected to stress relief annealing. The annealing temperature is 650 ° C for 2 hours, and the vacuum degree is 10 -4 Pa. The total processing rate of continuous cold rolling is 97.77%, and the finished base strip has a thickness of 0.08mm, a width of 100mm, and a leng...

Embodiment 3

[0023] A Ni-5at%W pre-alloyed rod was prepared by powder metallurgy, with a total amount of 30 kg. The gross weight of the alloy ingot obtained by smelting twice in a vacuum electric arc furnace is 27 kilograms. After removing the riser and surface peeling through flaw detection, the net ingot obtained is 21 kg. A slab material with a thickness of 25 mm and a width of 120 mm was obtained by forging. After removing the scale on the surface of the forged slab, it was hot rolled at 1200° C. to obtain a plate with a thickness of 8 mm. The pass processing rate of the hot rolling was 25%, and the total processing rate was 68%. The surface of the hot-rolled sheet is pickled and then cold-rolled, and the middle is subjected to stress-relief annealing. The annealing temperature is 650 ° C for 2 hours, and the vacuum degree is 10 -4 Pa. The total processing rate of continuous cold rolling is 97.77%, and the finished base strip has a thickness of 0.08 mm, a width of 100 mm, and a leng...

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Abstract

The invention discloses a preparing method of a nickel tungsten base band used for a coated conductor. A powder metallurgic method is adopted to prepare a Ni-5at%W pre alloy rod according to the atomic ratio of Ni to W which is equal to 95 to 5; the pre alloy rod is melted for two times in a vacuum electric arc furnace to obtain nickel tungsten cast ingot; after forging, hot rolling and cold rolling, Ni-5at%W alloy strip is obtained, and one time of destressing intermediate annealing is added into the cold rolling process; the continuous recrystallization annealing is carried out on the Ni-5at%W alloy strip to obtain the nickel tungsten base band with cubic texture. The powder metallurgic method and the vacuum electric arc furnace are adopted for the melting by the invention to prepare the nickel tungsten cast ingot. The evenness of the alloy distribution is improved. Processes of forging, hot rolling, cold rolling and continuous recrystallization annealing are adopted to obtain the nickel tungsten base band with the cubic texture with high sharpness. The alloy base band has high tensile strength and yield strength. The width and the length of the alloy base band can reach to the practical application requirement for the preparation of practical coated conductor long band.

Description

technical field [0001] The invention belongs to the technical field of high-temperature superconducting material preparation, and relates to a method for preparing an alloy base tape for a coated conductor, in particular to a method for preparing a nickel-tungsten alloy base tape for a coated conductor. Background technique [0002] Compared with Bi-based superconductors, Y-based superconductors have higher irreversible field (Birr) and high current-carrying capacity under high temperature and high magnetic field, and are the only high-temperature superconducting materials that can realize strong electric applications in the liquid nitrogen temperature range. The main problem limiting the application of Y-series superconductors is the weak connection caused by the high-angle grain boundaries between grains. It is necessary to reduce and eliminate the high-angle grain boundaries to form a strong texture to improve the current-carrying performance. At present, there are two wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C19/03C22C1/04C22F1/10C21D1/30C21D1/26C21D9/52
Inventor 郑会玲李成山王雪于泽铭冀勇斌张平祥
Owner NORTHWEST INSTITUTE FOR NON-FERROUS METAL RESEARCH
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