Preparing and cutting method for textured nickel-tungsten alloy composite base band

Abstract

The invention discloses a preparing and cutting method for a textured nickel-tungsten alloy composite base band. The method includes the steps that a hot-rolled nickel-tungsten alloy billet with the tungsten atom percent being 5.5%-6.3% is subjected to cold rolling to become 1.6 mm thick from being 7 mm thick, and then cracked edges are cut with the gap between an upper single-side disc cutter and a lower single-side disc cutter being 0.1-0.5 mm and the blade overlapping amount being 0.8-1.0 mm; the nickel-tungsten alloy continues to be subjected to cold rolling to become 95 micrometers thick, and then a tension-free disc cutting machine is adopted for cutting cracked edges with the gap between the upper single-side disc cutter and the lower single-side disc cutter being 8-10 micrometers and the blade overlapping amount being 50-70 micrometers; the edge-cut cold-rolled nickel-tungsten alloy composite base band which is 95 micrometers thick is subjected to continuous recrystallization heat treatment, and finally the tension-free disc cutting machine is adopted for carrying out cutting and splitting with the gap between the upper single-side disc cutter and the lower single-side disc cutter being 9-11 micrometers and the blade overlapping amount being 60-90 micrometers, wherein the edge cutting widths of the two sides of the nickel-tungsten alloy composite base band are both 2-4 mm. The cutting method is suitable for industrial production of high-performance textured nickel-tungsten alloy composite base bands and can well meet the requirement for follow-up preparation of high-performance transition layers and superconduction layers.

Description

technical field [0001] The invention relates to a preparation and shearing method of a textured nickel-tungsten alloy composite substrate, belonging to the technical field of preparation of a second-generation coated superconductor textured metal substrate. Background technique [0002] The second-generation high-temperature coated superconducting materials and their broad application technologies are considered to be high-tech with strategic significance in the 21st century. In the preparation of the second-generation high-temperature coated superconductor, RABiTS technology is a commonly used coating superconducting preparation technology. This method is to sequentially grow the transition layer and the superconducting layer on the ductile metal substrate with biaxial texture. Textured metal substrates used as coated superconducting tapes need to have a strong cubic texture to epitaxially grow transition layers and superconducting layers. At present, scholars at home and ...

AI Technical Summary

Problems solved by technology

Among the textured metal base strips used to prepare high-temperature coated superconducting strips, nickel-tungsten alloys are the most studied alloy base strips. During large-deformation cold rolling, cracks will occur on both sides of nickel-tungsten alloys. , Continuous heat treatment, subsequent coating of transition layer and superconducting layer are likely to cause strip breakage, so trimming the base strip after an appropriate amount of rolling deformation can avoid the above problems and reduce the number of shears during rolling , and burrs will be generated in the process of shearing the cracked edge. In the subsequent cold rolling process, the larger burrs will cause some tiny pits on the surface of the roll, especially the work roll, and these pits will be on the surface of the roll during the cold rolling process. The surface of the baseband is affected to a certain extent, such as periodic tiny bumps; in order to improve the production efficiency of the textured metal baseband, it is an effective way to prepare a baseband of a certain width, so for the wide baseband, it is necessary to cut into strips at the end. The required width specifications, due to the thinner base strip thickness after rolling and the lower hardness of the nickel-tungsten alloy base strip after recrystallization heat treatment, larger burrs, small edge waves, and dimples are likely to occur during the shearing and slitting process. Defects, the above shear defects will seriously affect the subsequent deposition of high-performance transition layer and superconducting layer

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