二次冷轧中间退火温度对3.5%Si无取向硅钢组织织构的影响机理  

Effect mechanism of intermediate annealing temperature on microstructure and texture of 3.5%Si non-oriented silicon steel during secondary cold rolling

作　　者：魏辉 林媛 王红霞[1] 王士嘉[1] 李旭 张文康 王一德[1,2] Wei Hui;Lin Yuan;Wang Hongxia;Wang Shija;Li Xu;Zhang Wenkang;Wang Yide(College of Materials Science and Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030024,China;Shanxi Taigang Stainless Steel Co.,Ltd.,Taiyuan Shanxi 030003,China)

机构地区：[1]太原理工大学材料科学与工程学院,山西太原030024 [2]山西太钢不锈钢股份有限公司,山西太原030003

出　　处：《金属热处理》2024年第3期37-43,共7页Heat Treatment of Metals

基　　金：山西省科技重大专项(20191102004);太原市关键核心技术攻关“揭榜挂帅”项目(20230224002);国家重点研发计划(2021YFB3803004)。

摘　　要：采用二次冷轧工艺制备厚度为0.25 mm、Si含量为3.5%的薄规格高牌号无取向硅钢,通过OM、EBSD、XRD和方圈磁性能测试研究不同中间退火温度(850、950和1050℃)下无取向硅钢组织、织构的演变规律。结果表明,随中间退火温度逐渐升高,成品退火板的平均晶粒尺寸先增大后减小,同时成品退火板立方织构和高斯织构的强度先增强后减弱,成品退火板的磁感应强度B5000先升后降,铁损值P1.0/400先降后升。当中间退火温度为950℃时,由于平均晶粒尺寸较大,且晶粒均匀性最好,二阶段冷轧后形成剪切带数量最多,为成品板退火过程中立方织构和高斯织构的形成提供了大量的形核位置,使其织构强度分别达到了13.56和5.03,导致成品退火板磁感应强度最高,B5000为1.691 T,铁损最低,P1.0/400为13.36 W/kg。Secondary cold rolling process was implemented for the trial production of high-grade non-oriented silicon steel,which had a thickness of 0.25 mm and a Si content of 3.5%.The evolution of microstructure and texture of the non-oriented silicon steel at different intermediate annealing temperatures(850,950 and 1050℃)was studied by means of OM,EBSD,XRD and square coil magnetic properties testing.The results show that with the increase of intermediate annealing temperature,the average grain size of the finished annealed sheet increases first and then decreases,and the strength of the cube and Goss textures of the finished annealed sheet increases first and then decreases,the magnetic induction strength B_(5000)of the finished annealed sheet increases first and then decreases,while the iron loss value P_(1.0/400)decreases first and then increases.When the intermediate annealing temperature is 950℃,due to the larger average grain size and the best grain uniformity,the number of shear bands after two-stage cold rolling is the highest,providing a large number of nucleation sites for cube and Goss textures during the annealing process of the finished sheet,resulting in texture strengths of 13.56 and 5.03,respectively,resulting in the highest magnetic induction intensity,with B_(5000)of 1.691 T,and the iron loss is the lowest,with P_(1.0/400)of 13.36 W/kg.

关 键 词：无取向硅钢 中间退火温度 二次冷轧工艺 织构 磁性能 

分 类 号：TG113.225[金属学及工艺—物理冶金] TG337.3[金属学及工艺—金属学]