脱碳退火工艺对薄规格取向硅钢织构及磁性能的影响

Effect of decarburizing annealing process on texture and magnetic properties of thin⁃gauge oriented silicon steel

采用EBSD及XRD等对薄规格取向硅钢试样不同退火温度(820、840、860℃)及退火时间(120、150 s)处理后的组织、织构和磁性能进行对比。结果表明,升高脱碳退火温度及减小退火时间可降低取向硅钢的晶粒尺寸,提高有利织构的比例及再结晶比例,为二次再结晶过程中Goss晶粒的异常长大提供基础,从而提高取向硅钢的磁性能。当脱碳退火温度为860℃,退火时间为120 s时,取向硅钢试样的磁性能最优,磁感J_(800)为1.807 T,铁损P_(1.7)为1.07 W·kg^(-1)。

Microstructure,texture and magnetic properties of thin⁃gauge oriented silicon steel after annealing at different temperatures(820,840,860℃)and time(120,150 s)were compared by means of EBSD and XRD.The results show that increasing the decarburization annealing temperature and decreasing the decarburization annealing time can reduce the grain size,increase the proportion of favorable texture and recrystallization ratio of the oriented steel,which provide the basis for the abnormal growth of Goss grains in the process of secondary recrystallization,so as to improve the magnetic properties of the oriented silicon steel.When the decarburization annealing temperature is 860℃and the annealing time is 120 s,the oriented silicon steel specimen obtains the best magnetic properties,with the magnetic induction intensity J_(800)of 1.807 T and the core loss P_(1.7)of 1.07 W·kg^(-1).