Method of preparing strong-cubic texture composite base band for coating superconductor by metal powder rolling

A technology of strong cubic texture and metal powder, which is applied in the field of preparation of cubic texture nickel-tungsten-nickel-chromium alloy composite base tape for high-temperature coated superconductors, and can solve problems such as difficulty in realizing large-scale industrial production

Active Publication Date: 2014-05-28
深创超导(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is difficult for single-layer NiW alloy base tape to meet the requirements of strong cubic texture content, non-ferromagnetism, and high strength at the same time; and the method of preparing composite base tape ingots by ordinary powder metallurgy is difficult to achieve mass industrial production

Method used

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  • Method of preparing strong-cubic texture composite base band for coating superconductor by metal powder rolling
  • Method of preparing strong-cubic texture composite base band for coating superconductor by metal powder rolling
  • Method of preparing strong-cubic texture composite base band for coating superconductor by metal powder rolling

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The Ni powder with a purity of 99.99% and the W powder with a purity of 99.95% are mixed according to the atomic percentage of W at 8at%; the Ni powder with a purity of 99.99% and the Cr powder with a purity of 99.90% , according to the atomic percentage content of Cr is 13at%; the above two mixed metal powders are mixed evenly in a high-speed inclined horizontal powder mixer; the powder mixing tank is vacuumed, and the vacuum pressure is 8Pa; The barrel speed is controlled at 80 rpm; the powder mixing time is 2 hours;

[0028] (2) Pour the uniformly mixed powder into the three adjacent powder storage tanks of the integrated type respectively; the order of powder placement is as follows: the inner powder storage tank is filled with NiCr mixed powder, and the outer two powder storage tanks are filled with NiW mixed powder ;The opening width of the three powder storage tanks is the same, each 30mm wide; the powder storage tank and the roll are placed vertically, the r...

Embodiment 2

[0037] (1) The Ni powder with a purity of 9.99% and the W powder with a purity of 99.95% are mixed according to the atomic percentage of W at 8.5at%; the Ni powder with a purity of 99.99% and the Cr with a purity of 99.90% Powder, according to the atomic percentage content of Cr is 14at%; the above two mixed metal powders are mixed evenly in a high-speed inclined horizontal powder mixer; the powder mixing tank is vacuumed, and the vacuum pressure is 8Pa; The speed of the powder bucket is controlled at 90 rpm; the mixing time is 1.5 hours;

[0038] (2) Pour the uniformly mixed powder into the three adjacent powder storage tanks of the integrated type respectively; the order of powder placement is as follows: the inner powder storage tank is filled with NiCr mixed powder, and the outer two powder storage tanks are filled with NiW mixed powder The opening width of the inner powder storage tank is 50mm, which is twice the opening width of the outer powder storage tank; the powder ...

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Abstract

A method of preparing a strong-cubic structure composite base band for a coating superconductor by metal powder rolling belongs to the technical field of high-temperature coating superconducting base bands. Adopted materials are high-purity nickel powder, tungsten powder and chrome powder with the purities over 99.9 percent; an initial raw plate blank is obtained by a powder rolling method, and is subjected to long-term high sintering, hot rolling and surface polishing to obtain a nickel tungsten-nickel chromium composite initial billet with compact interlayer bonding; then multi-pass cold rolling, rolling intermediate restorative heat treatment and final high-temperature recrystallization annealing are performed to obtain the nickel tungsten-nickel chromium alloy composite base band which is provided with a strong cubic structure at the outer layer and a magnetism-free high-strength core layer. According to the method, the high-performance nickel tungsten-nickel chromium alloy composite base band is obtained by a special method of preparing a composite billet; the alloy base band prepared by the method has the characteristics of convenient preparing process, strong cubic structure content, no ferromagnetism, high strength and the like, and is easy for large-scale industrial production.

Description

technical field [0001] The invention relates to a method for preparing a cubic-textured nickel-tungsten-nickel-chromium alloy composite substrate for high-temperature coating superconductors, and belongs to the technical field of high-temperature coating superconducting substrates. Background technique [0002] The method of preparing coated conductor substrates using the RABiTS technology route has been studied by the scientific community for nearly 20 years. Because of its low preparation cost and high production efficiency, textured substrates have been put into industrial production and widely used in western developed countries. [0003] At present, the NiW alloy baseband has excellent comprehensive properties (mechanical properties, oxidation resistance, magnetic properties, texture properties, etc.), so it is one of the most widely studied and mature baseband materials in the scientific community. However, it is difficult for a single-layer NiW alloy base tape to sim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F3/18B22F7/02C22C19/03C22C19/05
Inventor 索红莉孟易辰王毅马麟田辉梁雅儒彭发学王盼
Owner 深创超导(深圳)科技有限公司
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