退火过程中无取向电工钢的晶粒长大行为及磁性能演变  

Grain growth behavior and magnetic property evolution of non-oriented electrical steel during annealing

作　　者：郭文一 焦海涛 谢信祥 赵龙志[1,2] 赵明娟 胡勇[1,2] Guo Wenyi;Jiao Haitao;Xie Xinxiang;Zhao Longzhi;Zhao Mingjuan;Hu Yong(Key Laboratory of Advanced Materials for Vehicles&Laser Additive Manufacturing of Nanchang City,East China Jiaotong University,Nanchang Jiangxi 330013,China;School of Materials Science and Engineering,East China Jiaotong University,Nanchang Jiangxi 330013,China)

机构地区：[1]华东交通大学南昌市载运工具先进材料与激光增材制造重点实验室,江西南昌330013 [2]华东交通大学材料科学与工程学院,江西南昌330013

出　　处：《金属热处理》2022年第8期123-129,共7页Heat Treatment of Metals

基　　金：江西省教育厅青年基金(GJJ190349);大学生创新创业训练计划(1500420013)。

摘　　要：对Fe-3%Si无取向电工钢冷轧板进行不同时间的退火处理,利用光学显微镜、EBSD等研究了退火过程的晶粒长大行为及其对磁性能的影响。结果表明,随着退火时间的增加,退火板中Goss以及γ织构晶粒占比降低,{114}<841>以及{001}<120>织构晶粒占比增大。在退火时间低于20 s时,退火织构以强γ和Goss织构为主。退火时间为60 s时,{001}<120>织构晶粒长大速率急剧增大,平均晶粒尺寸达到约105μm。退火时间达到240 s时,退火织构以强{001}<120>以及{114}<841>织构为主。退火时间为30~60 s时轧向及横向磁感值迅速增大,60 s时轧向磁感达到最大值1.74 T,120 s时横向磁感达到最大值1.67 T,之后随着退火时间增加而轻微降低,并分别稳定在1.72 T和1.66 T左右。退火板45°方向磁感值先升高后降低,20 s时达到最大值1.67 T。各方向的铁损值均随退火时间的增加而降低,且磁各向异性逐渐减小。Cold rolled Fe-3%Si non-oriented electrical steel sheet was annealed for different time. The grain growth behavior and magnetic properties evolution of the non-oriented electrical steel during annealing were investigated by optical microscope, EBSD and so on. The results indicate that the proportion of Goss and γ texture grains decreases with the increase of annealing time, while the proportion of {114}<841> and {001}<120> texture grains increases gradually. When the annealing time is lower than 20 s, the recrystallization texture is characterized by strong γ and Goss textures. When annealed for 60 s, the growth rate of {001}<120> texture grains increases sharply, and the average grain size reaches about 105 μm. When the annealing time is 240 s, the annealing texture is mainly strong {001}<120> and {114}<841> textures. The magnetic induction intensity along RD and TD rises rapidly during annealing for 30-60 s, and the value along RD reaches the maximum of 1.74 T at 60 s, and value along TD reaches the maximum of 1.67 T at 120 s. After that, the magnetic induction intensity decreases slightly with the increase of annealing time and stabilizes at about 1.72 T(RD) and 1.66 T(TD), respectively. The magnetic induction intensity along the 45° direction increases first and then decreases, reaching the maximum value of 1.67 T at 20 s. The iron loss along each direction decreases with the increase of annealing time, and the magnetic anisotropy also decreases gradually.

关 键 词：无取向电工钢 退火时间 晶粒长大 织构 磁性能 

分 类 号：TG113[金属学及工艺—物理冶金]