A kind of preparation method of high performance cubic texture ni-12at.%w alloy base tape

Abstract

The invention discloses a preparation method of a high-performance cubic texture Ni-12at.%W alloy base band. The preparation method comprises the following steps: at first, preparing a square casting blank, with a columnar crystal structure, of Ni-12at.%W alloy by adopting the directional solidification technology, wherein the long axis of the columnar crystal is parallel with the thickness direction of the casting blank; removing the oxide skin of the obtained square casting blank, and then directly carrying out cold rolling to obtain a Ni-12at.%W alloy cold-rolled sheet; carrying out recovery heat-treatment on the obtained alloy cold-rolled sheet, wherein the thermal treatment technology is as follows: preserving the temperature at 600-680 DEG C, and then rapidly cooling to the room temperature; carrying out secondary cold rolling on the Ni-12at.%W alloy sheet subjected to the recovery heat-treatment; and carrying out final recrystallization annealing on the Ni-12at.%W alloy subjected to secondary cold rolling to obtain the Ni-12at.%W alloy base band with a strong cubic texture. The Ni-12at.%W alloy base band is integrally free of ferromagnetism, has strong cubic texture, is higher in yield strength under the room temperature, is suitable for industrial production, and meets the requirement for preparing high-performance coating superconductive strip.

Description

technical field [0001] The invention relates to a method for preparing a textured metal substrate for a high-temperature coating superconductor, in particular to a method for preparing a Ni-12at.%W alloy substrate. Background technique [0002] In the preparation route of high-temperature coated superconducting materials, the textured alloy base band, which is an important part of the multilayer structure of the coated superconductor, plays an important role in the support, epitaxial growth transition layer and superconducting thin film. For textured metal substrates, strong cubic texture, no ferromagnetism in liquid nitrogen temperature zone, and high mechanical properties are the keys to prepare high-performance coated superconducting tapes, and good mechanical properties can effectively avoid coating superconducting. Broken belt due to tensile stress during production. [0003] At present, the textured Ni-5at.%W alloy substrate used for coated superconducting strips has ...

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Problems solved by technology

[0003] At present, the textured Ni-5at.%W alloy substrate used for coated superconducting strips has been produced on a large scale, but because it has ferromagnetism (Tc=335K) in the liquid nitrogen temperature region, it will cause alternating current in the application of alternating current. Loss, and its yield strength is low, so that its performance needs to be further improved

Because when the atomic percentage of tungsten reaches more than 9%, the nickel-tungsten alloy baseband exhibits no ferromagnetism in the liquid nitrogen temperature zone, and the mechanical properties also increase with the increase of the W atom content, but it is difficult to pass the traditional alloy baseband. Fabrication technique to obtain strong cubic texture

[0004] Strong cubic texture, mechanical properties and ferromagnetism are difficult to achieve at the same time. The solid solubility limit of W atoms in metallic nickel is 12%. At present, some patents report the preparation method of Ni-9at.%W alloy baseband. However, For textured nickel-tungsten alloys, Ni-12at.%W alloys have superior mechanical properties, and there are no reports about Ni-12at.%W basebands. Therefore, how to prepare strong cubic texture, non-ferromagnetic, The high-strength Ni-12at.%W alloy base band is a difficult point in the field of coated superconducting research, and has important practical value for the development of high-temperature coated superconducting materials

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