初始晶粒尺寸和轧制间回复退火对Ni-9.3at%W合金基带立方织构形成影响的研究

Effect of Initial Grain Size and Intermediate Recovery Annealing on the Formation of Cube Texture in Ni-9.3at%W Substrate

摘要:

无磁性、高强度Ni-9.3at%W（Ni9W）合金由于其较低的层错能，难以通过传统的轧制及再结晶退火得到强立方织构。本工作采用熔炼制坯路线，结合均匀化退火和中间再结晶退火的方法得到了晶粒尺寸细小，合金元素W均匀分布的Ni9W坯锭，通过总变形量为99%的轧制，中间引入四次轧制间回复退火得到了厚度为80 μm的Ni9W轧制基带，最后采用两步再结晶退火的方式得到了再结晶立方织构含量为80.2%（<10o）的Ni9W合金基带。

Abstract:

It is difficult to obtain a sharp cube texture through the traditional cold rolling and recrystallization annealing procedure in the non-magnetic and high yield strength Ni-9.3at%W (Ni9W) alloy due to its low stacking fault energy. In this paper, a Ni9W ingot with fine grain and homogenized tungsten distribution was prepared by the conventional metallurgy technique combined with homogenization annealing and intermediate recrystallization annealing. The rolling substrate with 80 μm thickness was obtained through intensive cold rolling and four-time intermediate recovery annealing. The total thickness reduction was 99%. A fraction of 80.2% (<10°) of cube orientation was measured for the Ni9W alloy tape through the two-step recrystallization annealing method.