20mm薄板坯制备高牌号无取向硅钢织构演变

Texture Evolution of High Grade Non-oriented Silicon Steel Produced by 20 mm Thin Slab

研究了20 mm薄板坯流程生产的高牌号无取向硅钢在热轧—常化—冷轧—退火过程中织构的演变。采用EBSD技术进行织构的测定。结果表明,热轧板沿板厚方向织构变化比较明显,S=0.9层的最强织构组分为高斯织构,S=0.5层的主要织构为{221}<227>,S=0处最强织构组分为旋转立方织构。常化板S=0.9层和S=0层存在较强的{223}<110>织构,S=0.5层的最强织构组分为{332}<113>织构。冷轧板各层以较强的{001}<110>-{223}<110>织构组成。退火板各层中均含有强的{001}<130>织构,表层含有一定量的γ纤维织构。

In this paper texture evolution of high grade non-oriented silicon steel produced by 20 mm thin slab in the course of hot rolling,normalizing,cold rolling and annealing process was investigated. The texture of samples was measured by EBSD. The results show that the texture intensity through thickness of hot rolled strip change obviously,Goss texture has highest intensity in the S = 0. 9 layer,and Quite strong{ 221} 227 dominates in the S = 0. 5 layer,while rotate cube texture takes a leading role in the S =0 layer. In the surface and center layer of the cold normalized strip,the main texture is { 223} 110 ,while the main texture in the S = 0. 5 layer is { 332} 113 . In the each layer of the cold rolled sheet,the { 001} 110 - { 223} 110 has strong intensity. The annealed sheet has a strong { 001} 130 texture while a certain amount of γ-fiber texture occurs in the surface layer.