The Influence Of Deformation And Heat Treatment On The Formation Of Cube Texture In Nickel Baseband

YBCO high temperature superconductor which with higher current density, betterelectric conductivity, the higher the irreversible field, lower manufacturing costs, andmany other advantages, has gradually replace the first generation of high temperaturesuperconducting, becoming the hot spot in the research of the race. Existing studieshave shown that Ni-5at%W alloy with enough strong antioxidant capacity, highstrength, low ferromagnetic characteristics has been currently recognized as the mostsuitable material for baseband alloy. The nickel-base substrate which has been used tomanufacture coated conductors, need to have good cubic texture, and the annealingtemperature and rolling deformation quantity of metal nickel substrate have great effecton the formation of the cubic texture.So this article utilized the powder metallurgy methods to prepare Ni-5at.%Wbaseband, in the course of cold rolling after90%reduction, different temperature ofpre-annealing and low strain were performed, subsequently deformation microstructureunder the heat treatment process were studied. This paper analyzes the effect ofdifferent pre-annealing temperatures and annealing time on baseband cubic texture andthe grain boundary, and analyzes the role of multiple low strain route in the process ofthe formation of the cubic texture.Aimed at different pre-annealing temperature on Ni-5w at.%W alloy, the researchshows that:(1) the first cubic grain number, size and distribution were determine by theannealing temperature, small rolling quantity can promote the development of grainstorage.(2) partial recrystallization annealing in advance the size of the sample isthrough after annealing technique advantage and the strain induced grain boundarymigration mechanism of small rolling quantity (SIBM) to obtain than expected replyannealing and fully recrystallization annealing samples more cubic texture.the effects of multiple low strain route on the formation of cube texture, we getreply:(1) for300℃recovery pre-annealing and600℃partial recrystallizationpre-annealing sample under the thermomechanical treatment, with the increase of lowstrain route, cubic texture increases gradually, but on the contrary, cubic texturedecreases while annealing at700℃. The fraction of cubic texture obtain at600℃pre-annealing are much more than pre-annealing at300℃and700℃, but the changeof the cubic texture is not unlimited, there is a peak under the circulation process.(2) compare with the other temperatures，more low angle grain boundaries were obtainedwhen annealing at600℃，meanwhile there were less high-angle grain boundaries and Σ3grain boundaries. The grain boundary structure features help to improve the grainboundary of weak coupling problems, improve the critical current density and reducethe groove depth when annealing at high temperature.(3) The greater deformation oflow strain, the more storage energy can provide, therefore, the more number of cubictexture were obtained. with increasing annealing time, it does not mean that the morecubic texture achieved, on account of the annealing, the significant growth advantage ofcubic orientation grains over other orientation grains will decline.