采用轧制法制备出具有低铁损高磁感0.23 mm 厚6.4%(质量分数)Si 高硅钢。沿轧制方向的最终磁性能为 B8=1.474 T,B50=1.714 T；P10/50=0.30 W/kg,P15/50=0.88 W/kg。利用X射线衍射及背散射电子衍射(EBSD)技术分析了高硅钢在轧制及退火过程中的织构演变过程。结果表明,通过采用大压下率热轧,确保热轧板次表层中产生更多的高斯织构,随后进行遗传；温轧板中粗大的晶粒有利于冷轧剪切带的形成；冷轧板经脱碳退火后生成强{210}〈001〉织构及次表层较强的高斯织构是在轧向上获得高磁感的原因,归因于其在{111}〈112〉冷轧形变晶粒内的剪切带优先形核并长大；最终退火后虽出现了随机取向,但以{310}〈001〉织构为代表的η织构得以保留并且增强,进一步提高了磁感。随着退火温度的升高及保温时间的延长,高硅钢薄板晶粒尺寸不断增大,铁损明显降低。
6.4wt%Si high silicon steel sheets (0.23 mm thick)with low iron loss and high magnetic induction were successfully produced by rolling process.The final magnetic properties along the rolling direction (RD) were:B8=1.474 T,B50=1.714 T;P10/50=0.30 W/kg,P15/50=0.88 W/kg.The texture evolution during rolling and annealing was investigated by means of X-ray diffraction and electron backscatter diffraction (EBSD).It was found that more Goss textures formed in the subsurface of hot rolled plates by using large hot rolling reduction,and then was inherited;the coarse grains in warm rolled plate were good for the formation of shear band during cold rolling;the high magnetic induction along the RD was achieved after decarburization an-nealing due to the formation of strong {210}〈001〉and Goss texture which mainly nucleated and grew within shear bands of the deformed{1 1 1}〈1 1 2〉grains;although some random orientation existed after final annealing, the magnetic induction was further improved due to the retention and enhancement of {310}〈001〉inηtexture. With the increasing of annealing temperature and annealing time,the grains of the high silicon steel sheet grew and the iron loss decreased significantly.
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