A kind of preparation method of nickel-tungsten substrate with high strength and strong cubic texture

Abstract

A method for preparing a high-strength, strong cubic-textured nickel-tungsten substrate, comprising the following steps: (1) Alloy thin strip continuous casting and heat treatment: the tungsten atomic percentage is 12%, and the continuous casting thin strip process technology is adopted Obtain a nickel-tungsten binary alloy ingot, the thickness of the ingot is 2.0mm, and the content of impurity elements sulfur, carbon, and phosphorus are all controlled below 30ppm, and then the ingot is heat treated. The process is: 1300°C for 2 hours; (2) Hot rolling of the alloy billet: hot rolling the billet, the hot rolling process is: the starting rolling temperature is 1380°C, the final rolling temperature is 1150°C-1180°C, single-pass hot rolling, and the deformation is 50%; and ( 3) Cold-rolling and heat treatment of hot-rolled sheet: After descaling the hot-rolled sheet, carry out cold-rolling, the cold-rolled deformation is 70% to 78%, and then carry out recovery heat treatment on the cold-rolled strip, the process is: 700°C heat preservation 2min, and then carry out recrystallization heat treatment. The recrystallization heat treatment process is: under an external magnetic field of 8T ~ 12T, heat preservation at 1260°C ~ 1300°C for 20min.

Description

technical field [0001] The invention relates to a preparation method of a high-temperature coated superconductor strip reinforced textured metal base band, in particular to a preparation method of a non-ferromagnetic high-strength textured nickel-tungsten alloy base band. Background technique [0002] The second-generation high-temperature superconducting materials have a wide range of application values ​​in the fields of strong electricity, strong magnetism, and weak electricity. [0003] The second-generation coated superconducting tape is composed of a ductile metal substrate and its epitaxially grown multilayer film. The ferromagnetism, strong cubic texture and mechanical properties of the metal substrate tape are the most important in the field of coating superconducting tape preparation. problem to be solved. At present, the Ni-5at.% W alloy base strip has been commercially produced, but the mechanical strength and magnetic properties of the Ni-5at.% W alloy base str...

AI Technical Summary

Problems solved by technology

At present, the Ni-5at.% W alloy base strip has been commercially produced, but the mechanical strength and magnetic properties of the Ni-5at.% W alloy base strip cannot meet the requirements of high-performance coated superconducting strips, making the application of superconducting materials The field is limited to a large extent. Although the mechanical properties and magnetic properties can be effectively improved with the increase of W content, it is suitable for the research of high-performance basebands, but it is difficult to obtain strong cubic texture through traditional preparation routes, resulting in high-performance nickel-tungsten The alloy baseband has not yet been commercially produced, which is a difficulty in the current research on nickel-tungsten alloy basebands

Images