时效轧制温度对低温取向硅钢组织、织构及磁性能的影响

Effect of Aging Rolling Temperature on the Microstructure,Texture and Magnetic Properties of Low-temperature Grain-oriented Silicon Steel

通过在不同温度下保温5 min的时效轧制实验,研究了时效轧制温度(150、200、250、300℃)对低温取向硅钢组织、织构及磁性能的影响。结果表明,时效轧制温度对低温取向硅钢的冷轧及初次再结晶组织形貌没有明显的影响。但随着时效轧制温度的升高,初次再结晶组织中{111}<112>和Goss织构含量均先增加后减少,{111}<112>织构在200℃时具有较高的含量,Goss织构在250℃时含量较高,此时{411}<148>和{100}<012>初次再结晶织构的占比相对较低。初次再结晶组织中,有利的Goss及{111}<112>织构含量增加和不利的{100}<012>织构含量减少,使得试样在高温退火过程中能够发生较完善的二次再结晶,经高温退火后,细小晶粒及岛状晶粒较少,成品板具有优异的磁性能。

The effects of aging rolling temperature(150,200,250,300℃)on microstructure,texture and magnetic properties of low-temperature grain-oriented silicon steel were studied by aging rolling experiment at different temperatures for 5 min.The results show that the aging rolling temperatures has no obvious effect on the microstructure morphology of cold rolling and primary recrystallization of low-temperature grain-oriented silicon steel.However,the contents of{111}<112>and Goss in the primary recrystallization microstructure increased and then decreased with the increase of aging rolling temperature,and with the highest contents at 200℃for{111}<112>texture,while at 250℃for Goss texture.And the proportion of primary recrystallization texture of{411}<148>and{100}<012>is relatively low.The increase of Goss and{111}<112>texture and the decrease of{100}<012>texture in the primary recrystallization microstructure resulted in perfect secondary recrystallization of the sample during high temperature annealing.After high temperature annealing,there were fewer fine grains and island grains,and the final sheets had excellent magnetic properties.