常化工艺对高磁感取向硅钢组织和织构的影响

Effects of Normalizing Process on Microstructure and Texture of High Magnetic Induction Oriented Silicon Steel

常化工艺作为取向硅钢重要的生产制造工序,对高磁感取向硅钢磁性能有关键影响。文章利用光学显微镜和X射线衍射仪,研究了常化保温时间和冷却速度对高磁感取向硅钢组织和织构的影响。常化板对热轧板的组织和织构有一定的继承性,在板厚方向上组织具有不均匀性,织构类型主要为Goss织构{110}<001>、铜型织构{112}<111>和黄铜型织构{110}<112>。延长保温时间,晶粒完全发生再结晶,织构类型发生显著变化;提高冷却速度,组织及织构类型无显著变化,Goss织构强度提高。

As an important manufacturing process of oriented silicon steel,the normalizing process has a key effect on magnetic properties of high magnetic induction oriented silicon steel.In the paper,the effects of holding time and cooling rate for normalizing on microstructure and texture of high magnetic induction oriented silicon steel are studied with optical microscope and X-ray diffractometer.The microstructure and texture of normalizing plate are similar to those of hot rolled plate as well as microstructure is with nonuniformity in the direction of plate thickness.The main types of texture are Goss texture{110}<001>,copper type texture{112}<111>and brass type texture{110}<112>.With the extension of holding time,grains recrystallize completely and texture types are changed significantly;with the increase of cooling rate,there are not significant changes for microstructure and texture types as well as strength of Goss texture is increased.