Preparation method of non-magnetic high-strength texture Ni-W alloy baseband

Abstract

The invention discloses a preparation method of a non-magnetic high-strength texture Ni-W alloy baseband. The preparation method comprises the following steps: acquiring an Ni-9.6 at.% W alloy cast ingot by adopting vacuum induction smelting, carrying out hot forging and hot rolling on the cast ingot, and removing oxide skin positioned on the surface of a hot rolling blank by combining one-pass cold rolling with shot blast treatment; and successfully acquiring the non-magnetic high-strength strong-cube texture hectometre-level Ni-9.6 at.% W alloy baseband by carrying out warm rolling and the cold rolling with a certain deformation amount, introducing stress relief annealing twice in a cold rolling process, longitudinally shearing the cracked edge of a band in the cold rolling process and finally carrying out continuous recrystallizing heat treatment. The preparation method disclosed by the invention lays a good foundation for realizing the industrialized production of second-generation high-temperature superconductors.

Description

technical field [0001] The invention relates to a method for preparing a non-magnetic, high-strength textured Ni-W alloy base band, and belongs to the technical field of preparing a textured metal base band for high-temperature coating conductor industrialization. Background technique [0002] Compared with the first-generation high-temperature superconducting materials, the second-generation high-temperature superconducting tape represented by yttrium barium copper oxide (YBCO) has the advantages of higher critical current density, high irreversible field and low AC loss, so it has become the current One of the superconducting materials with the most possible industrial applications. In the preparation of the second generation of high-temperature coated superconductors, the RABiTS technology, that is, the calender-assisted biaxial textured substrate preparation technology, is a commonly used substrate preparation technology. For the textured substrate for YBCO coated conduc...

AI Technical Summary

Problems solved by technology

Although the 100-meter-level Ni-5at.%W alloy base strip can be commercially produced, the Ni-5at.%W alloy base strip still has ferromagnetism in the liquid nitrogen temperature range, and the mechanical strength needs to be improved, which will limit the coating. The further wide application of superconductors, studies have shown that with the increase of W atom content, the mechanical strength of nickel-tungsten alloy increases, and the Curie temperature decreases. When the W atom content reaches 9%, the Curie temperature of nickel-tungsten alloy decreases to liquid nitrogen Therefore, high W content, especially non-magnetic, high-strength textured nickel-tungsten alloy baseband has wider application value, and when the W atomic content is greater than 5%, it is difficult to obtain a strong cubic baseband through the traditional baseband preparation process. Texture, this kind of material is the focus and difficulty of research in the world

Images