High-intensity texture copper-nickel/nickel-tungsten alloy double-layered composite base band and preparation method thereof

Abstract

The present invention discloses a high-intensity texture copper-nickel / nickel-tungsten alloy double-layered composite base band and a preparation method thereof. The preparation method comprises the following steps: conducting high-temperature forging and hot-rolling on a copper-nickel alloy, of which the percentage content of copper atoms is 46%, acquired from smelting to obtain billets; defining the billets as A; defining nickel tungsten mixing powder, of which the percentage content of tungsten atoms is 12%, as B; placing the A and the B in a mould layer by layer; adopting electric discharging plasma for sintering to obtain copper-nickel / nickel-tungsten double-layered composite billets; conducting cold-rolling on the obtained composite billets to strips, of which the thickness is 40 Mum; conducting recrystallization heat treatment on the cold-rolling composite base band at a high temperature; and finally obtaining the high-intensity ferromagnetism-free strong cubic texture copper-nickel / nickel-tungsten alloy double-layered composite base band.

Description

technical field [0001] The invention relates to a high-strength textured copper-nickel / nickel-tungsten alloy double-layer composite substrate and a preparation method thereof, belonging to the technical field of reinforced high-temperature coating superconductor textured metal substrates. Background technique [0002] Rolling-assisted biaxial texturing technology (RABiTS) is one of the main technical routes for the preparation of the second-generation high-temperature coated superconducting strip, and the metal substrate material used as the coated superconducting strip needs to have high mechanical strength, Strong cubic texture and low or no ferromagnetism. At present, the textured Ni-5at.%W alloy substrate has been widely used in the research of the substrate material for the second generation high temperature coated superconducting tape. However, the mechanical strength and magnetic properties of Ni-5at.% W alloy base strip can no longer meet the requirements of high-pe...

AI Technical Summary

Problems solved by technology

However, the mechanical strength and magnetic properties of the Ni-5at.% W alloy base strip can no longer meet the requirements of high-performance coated conductor strips

The nickel-tungsten alloy substrate with high W content has high mechanical strength and low or no ferromagnetism, but as the W atomic content increases, the stacking fault energy of the nickel-tungsten alloy gradually decreases, especially if the W atomic percentage exceeds 5% When , it is difficult to obtain a strong cubic texture through the traditional baseband preparation route

Studies have shown that when the copper content is above 54at.%, the copper-nickel alloy base band is non-magnetic in the liquid nitrogen temperature zone, and the price of copper is cheaper than nickel and tungsten, but the yield strength of the copper-nickel alloy base band is low. Chinese patent CN101786352A discloses a method for preparing a copper-based alloy composite substrate with a non-magnetic cubic texture. Its structure is composed of three layers of materials. Since the three-layer structure is limited by the thickness ratio of the inner and outer layers, its mechanical strength still needs to be improved.

Images