【作者】 任强； 程林； 张宝磊； 张立峰；

【Author】 REN Qiang;CHENG Lin;ZHANG Bao-lei;ZHANG Li-feng;Shougang Zhixin Qian’an Electromagnetic Material Co.Ltd;School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing;

【机构】 北京科技大学冶金与生态工程学院； 首钢智新迁安电磁材料有限公司；

【摘要】 析出物的数量、尺寸和种类是影响无取向电工钢磁性能的重要因素之一。本文采用ASPEX自动扫描电镜对一商用无取向电工钢的退火板和热轧板进行了析出物分析。发现在退火板中析出物的类型主要为纯AlN和AlN-MnS复合析出两类。析出物在退火板截面上沿轧板厚度方向的分布是不均匀的,退火板中心AlN和AlN-MnS尺寸大,数量少,而边部相反。热轧板截面上析出物的分布也有相同的规律,热轧板中的析出物分布对退火板具有遗传性。对于析出物尺寸较大的样品,晶粒尺寸也大,磁性能较好。同时还验证了退火过程中发生的渗氮会在退火板表面形成一层细小的AlN和细晶层,也会恶化铁损。更多还原

【Abstract】 Precipitateisone of the key factors affecting the magnetic properties of non-oriented electrical steels.In the current study,an automatic scanning electron microscope(ASPEX) was employed to analyze the size,composition and distribution of precipitates in annealed and hot-rolled sheets.Precipitates distributed unevenly on the longitude section of annealed and hot-rolled sheets.In the center of the sheet,precipitates tended to be less and larger than that in edge.The grain size of the sample with larger and less precipitates is larger than that with smaller and more precipitates.Besides,nitriding layer was also verified to be detrimental to the magnetic properties.更多还原