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以高纯Cr17铁素体不锈钢为实验材料,对比研究了热轧不退火、退火两种工艺对其板厚方向织构演变、成形性及表面皱折的影响。采用金相显微镜、X射线衍射技术及背散射电子衍射技术观察两种工艺条件下的组织和织构演变。结果表明:成品板各层织构特征存在显著差异,这是由于低温轧制过程中沿板厚方向不同应变状态导致的热轧织构梯度遗传所致。与热轧不退火相比,热轧退火有利于成品板各层γ纤维再结晶织构增强,偏离{111}<112>组分的程度减弱,α纤维织构弱化;有利于弱化成品板的带状晶粒簇,促使晶粒簇分布均匀分散。
High-purity Cr17 ferritic stainless steel was used as the experimental material to study the effect of hot-rolling without annealing and annealing on the texture evolution, formability and surface corrugation in the thickness direction. The microstructures and texture evolutions under two processing conditions were observed by optical microscope, X-ray diffraction and backscattered electron diffraction. The results show that there are significant differences in the texture features of the finished boards due to the gradient of the hot-rolled texture caused by the different strain states along the thickness direction during the low-temperature rolling. Compared with hot rolling, annealed annealing is beneficial to γ-ray recrystallization texture of all layers of finished product plate, the degree of deviating from {111} <112> component is weakened and α fiber texture is weakened; Ribbon cluster, to promote the uniform distribution of clusters.