IF钢罩式退火过程中织构变化的研究

STUDY ON TEXTURE DEVELOPMENT OF IF STEEL IN BATCH ANNEALING BY EBSD TECHNIQUE

使用ＥＢＳＤ（电子背散射衍射）手段对ＩＦ钢在罩式退火过程中织构的变化进行了研究。研究结果表明：冷变形纤维是由尺寸小于２ μｍ 的亚晶组成，亚晶之间具有空间取向差，｛００１｝变形晶粒中亚晶的取向差很小，而｛１１１｝变形纤维中亚晶的取向差通常较大，这导致｛１１１｝冷变形基体上首先发生形核和长大，而｛００１｝取向纤维最后被吞并；随着再结晶的进行，晶粒之间的取向差呈小角度关系的比例下降，这是因为具有相近取向的亚晶数量随着再结晶的进行而减少的缘故。

Through batch annealing simulation in lab, the texture development of Ti IF steel in batch annealing (BA) was studied. The results show that cold deformed fibers in IF steel contain many subgrains which are less than 2 μm,and there always exists misorientation between subgrains. Large angle misorientations are much more in γ fibers than in other fibers, which makes nucleation easily take place in <111>//ND fibers, and <110>//RD fibers to be consumed at the end of recrystallization. Because of subgrain coalesce and grain consumption, the ratio of small angle misorientation decreases with the process of annealing process.