热轧对涂层导体用镍基带立方织构形成的影响

Influence of Hot Rolling on Cube Texture Ni Substrate for Coated Conductor

热机械加工制备的立方织构Ni及其合金带材广泛用于YBCO涂层导体的基带。涂层导体的制备要求基带具有强的立方织构和小的晶界角。通过在冷轧前进行热轧制备了强立方织构的镍基带。用三维取向分布函数(ODF)研究了轧制织构和再结晶织构,通过扫描电镜EBSD的观测,分析了晶粒取向分布和立方织构晶界微取向角分布。结果表明,冷轧前进行热轧有利于形成很强的立方织构和小的晶界微取向角。

Pure Ni and Ni alloy tapes that were prepared by thermomechanical process were extensively used as the substrates with the sharp cube texture and small angle grain boundaries for coated conductor. The influence of hot rolling process on forming cube texture pure Ni was discussed. The sharp cube texture pure Ni was obtained by suitable hot rolling and recrystallization. This rolled texture of tape was studied using orientation distribution function（ODF）. Orientation mapping, content of the cube texture and grain boundary distribution were conducted through an EBSD system mounted on a LEO-1450 SEM. The resuhs show that the substrates prepared by hot rolling followed by cold rolling have sharp cube texture and small grain boundaries.