轧制法制备低铁损高磁感6.4%(质量分数)硅钢及其织构演变  

Rolling process and texture evolution of 6.4wt% silicon steel with low iron loss and high magnetic induction

作　　者：秦镜[1] 杨平[1] 毛卫民[1,2] 叶丰[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《功能材料》2014年第10期133-137,共5页Journal of Functional Materials

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA03A505)

摘　　要：采用轧制法制备出具有低铁损高磁感0.23mm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=0.30W/kg,P15/50=0.88W/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.

关 键 词：高硅钢 轧制 织构 磁感 铁损 

分 类 号：TG132[一般工业技术—材料科学与工程] TG142[金属学及工艺—合金]