Bimetal composite cube structured Ni-Ti base band and its preparation method

Abstract

The invention relates duplex metal composite cubic structure Ni-Ti baseband and preparing method, which is used for YBCO coating conductor and possesses the high mechanical strength. The baseband is comprises Ni possessing cubic structure and Ti in the core of Ni baseband. The method comprises the following steps: processing the Ni and Ti to complex, cold working it to required band at the 95% cold working rate, at 950-1100Deg.C, heat treating for 0.5-2 hours and getting cubic structure. The Ni-Ti baseband possesses good cubic structure and mechanical property. The invention is simple technology, good repeatability and easy to produce. The Ni-Ti baseband possesses not only good cubic structure, but also high mechanical strength and low magnetism.

Description

technical field

[0001] A bimetal composite cubic texture Ni-Ti base strip and a preparation method thereof relate to a bimetal composite cubic texture Ni-Ti base strip with high mechanical strength for YBCO coated conductors and a preparation method thereof. Background technique

[0002] YBCO coated conductor has good superconducting properties and is a high-temperature superconducting material with good application prospects. The United States, Japan, Europe and my country are all competing to develop this material. Cubic textured Ni substrate is the key material for the preparation of YBCO coated conductors. Because the lattice constant and thermal expansion coefficient of metal Ni are relatively close to those of YBCO, it is a more suitable baseband material for YBCO coated conductors. In the past, there have been preparation techniques and patents [ZL 97 1 21916.8] for cubic textured Ni basebands. However, during the recrystallization annealing of pure Ni, the cubic t...