论文部分内容阅读
利用双辊连铸-温轧-中间退火-平整轧制-最终退火工艺制备了厚度为0.50mm、质量分数为6.5%Si的硅钢薄带。利用光学显微镜、X射线衍射仪和磁性测量研究了不同的平整轧制量对最终退火板的金相显微组织、织构和磁性的影响。结果表明:退火板的平均晶粒尺寸随平整量的增加而逐渐减小,且晶粒尺寸差异减小。当平整量大于12%时,最终退火板表面织构为λ织构,中心层出现明显的γ织构,并且γ织构强度随平整量减小出现增强的趋势。当平整量较小时,织构强点比较分散。随着平整量的增加,最终退火板磁感应强度先减小而后增加。随平整量的增加,低频铁损先快速减小而后缓慢增加,而高频铁损则是逐渐下降。
A silicon steel strip with a thickness of 0.50mm and a mass fraction of 6.5% Si was prepared by twin-roll continuous casting-warm-rolling-intermediate annealing-smoothing-final annealing process. The microstructure, texture and magnetic properties of the final annealed sheet were investigated by optical microscope, X-ray diffraction and magnetic measurements. The results show that the average grain size of the annealed sheet decreases with the increase of the flattening amount, and the difference of the grain size decreases. When the flattening amount is more than 12%, the surface textures of the final annealed sheet are λ texture, the central layer shows obvious γ texture, and the γ texture strength tends to increase with the flattening. When the amount of formation is small, the texture is more dispersed. With the increase of the amount of flattening, the magnetic induction intensity of the final annealed sheet first decreases and then increases. With the increase of flat amount, the low frequency iron loss decreases rapidly and then increases slowly, while the high frequency iron loss decreases gradually.