No-ferromagnetism, high-strength and high-cubic-texture nickel tungsten composite base belt and preparation method

Abstract

The invention discloses a preparation method of a no-ferromagnetism, high-strength and high-cubic-texture nickel tungsten composite base belt. The preparation method comprises the following steps: (1)hot rolling of an alloy ingot: a Ni-12 at.% W nickel tungsten alloy ingot obtained by smelting is hot rolled; and the hot rolling process is as follows: the initial rolling temperature is 1280-1310 DEG C; the final rolling temperature is 1000-1030 DEG C; and the hot rolling deformation is 89-92%; (2) cold rolling and recrystallization heat treatment: a hot-rolled plate is cold rolled to reach thethickness of 50 microns; then, a cold-rolled strip is recrystallized and heated in pure hydrogen; and the recrystallization heat treatment process is as follows: the temperature of 1280-1320 DEG C ismaintained by 5 min; and (3) film sputtering: a layer of Ni-9 at.% W alloy film is deposited on the surface of the Ni-12 at.% W recrystallized strip by a magnetron sputtering method; and the processis as follows: the Ni-12 at.% W alloy ingot prepared by the smelting method is used as a target; the sputtering power is 190-210 W; and the film thickness is 5-20 nm. The magnetron-sputtered Ni-9 at.%W alloy films is free of influencing overall mechanical performances and magnetic performances of the base belt, and the film adopts high cubic texture, so that the composite base belt is high in strength and cubic texture.

Description

technical field [0001] The invention relates to a textured metal base band for a high-temperature coating superconductor strip, in particular to a non-ferromagnetic textured nickel-tungsten alloy composite base band and a preparation method thereof. Background technique [0002] In the second-generation textured metal substrate preparation technology for high-temperature coated superconducting tapes, a high-strength, non-ferromagnetic strong cubic textured metal substrate is the key to obtaining high-performance superconducting tapes. [0003] At present, the Ni-5at.%W alloy substrate has been widely used in the research of the second generation of high-temperature coated superconductors, but the mechanical strength and magnetic properties of the Ni-5at.%W alloy substrate cannot meet the needs of high-performance coated superconductors. Strip material requirements. Although copper-nickel alloy has no ferromagnetism and the cubic texture is easy to prepare, its strength cann...

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Problems solved by technology

[0003] At present, the Ni-5at.%W alloy substrate has been widely used in the research of the second generation of high-temperature coated superconductors, but the mechanical strength and magnetic properties of the Ni-5at.%W alloy substrate cannot meet the needs of high-performance coated superconductors. Conductor tape requirements

Although copper-nickel alloy has no ferromagnetism and the cubic texture is easy to prepare, its strength cannot be effectively improved at present, while the nickel-tungsten alloy with high tungsten content has high strength, but it is difficult to obtain strong cubic texture through traditional RABiTS technology

The composite baseband can improve the strength of the baseband and reduce the magnetic properties, but its strength is limited

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