A high-strength nickel-tungsten alloy substrate with strong cubic texture and its preparation method

Abstract

The invention relates to a high-strength nickel-tungsten alloy base band with a strong cubic texture, and a preparation method thereof. The preparation method comprises the following steps: proportioning a nickel block and a tungsten block according to the atom percentage content of 5.0 to 7.5 percent, putting the proportioned mixed material into a vacuum induction smelting furnace, performing smelting to obtain a nickel tungsten alloy cast ingot, and forging and hot-rolling the alloy cast ingot at a high temperature to obtain an initial blank ingot before cold rolling; removing oxidized skin from the surface of the hot-rolled blank ingot, and performing cold rolling until the thickness is 70 to 100 um and the total deformation quantity is 88 percent; electro-depositing nickel tungsten alloy coatings on the upper surface and the lower surface of the cold-rolled nickel-tungsten alloy base band, wherein the atom percentage content of the tungsten in the coatings is 15 to 18 percent; performing recrystallization annealing on the nickel-tungsten alloy base band after electro-deposition, wherein the particular process is as follows: the heating temperature is 1120 to 1170 DEG C, heat is preserved for 100 to 180 minutes, the heating rate is above 1000 DEG C / s and the protecting atmosphere is pure hydrogen. The product provided by the invention can obtain the strong cubic texture, is simple in preparation process, does not have ferromagnetism in a liquid nitrogen temperature area, and is high in yield strength, convenient in subsequent processing and suitable for industrialized production.

Description

technical field [0001] The invention relates to a composite substrate, in particular to a high-strength nickel-tungsten alloy substrate and a preparation method thereof. Background technique [0002] Since the discovery of high-temperature coated superconducting materials represented by YBCO, people have studied a variety of ductile metals as baseband materials for high-temperature coated superconductors. In the research of the second-generation high-temperature coated superconductor, the Ni-5at.% W alloy base strip is widely used as the base material of the high-temperature coated superconducting strip, and the transition layer and the superconducting layer are epitaxially grown. At present, there are many units The Ni-5at.% W alloy base strip can be commercially produced, but due to its low yield strength, ferromagnetism in the liquid nitrogen temperature range, etc., it cannot fully meet the requirements of more application fields. [0003] Studies have shown that when t...

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Problems solved by technology

In the research of the second-generation high-temperature coated superconductor, the Ni-5at.% W alloy base strip is widely used as the base material of the high-temperature coated superconducting strip, and the transition layer and the superconducting layer are epitaxially grown. At present, there are many units The Ni-5at.% W alloy substrate can be commercially produced, but due to its low yield strength and ferromagnetism in the liquid nitrogen temperature zone, it cannot fully meet the requirements of more application fields

[0003] Studies have shown that when the atomic percentage of tungsten is greater than 9.3 at.%, the nickel-tungsten alloy baseband has no ferromagnetism in the liquid nitrogen temperature zone, and its yield strength at room temperature is high, but it is difficult to prepare it through the traditional baseband preparation route. strong cubic texture

The Chinese patent application with the publication number CN 1844430A adopts powder metallurgy to prepare the initial alloy billet and then performs cold rolling and annealing to obtain a composite substrate with a cubic texture. However, the surface quality of the substrate prepared by powder metallurgy is poor, which is not conducive to the subsequent preparation of high-performance transition layer and superconducting layer, and the powder preparation time in powder metallurgy is long, the process is cumbersome, and it is not suitable for industrial production

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