Fe-6.5%Si钢极薄带的试制  

Trial production of Fe-6.5%Si steel ultra-thin strip

作　　者：曾春 程朝阳[2] 王项龙[3] 吴章汉 ZENG Chun;CHENG Zhao-yang;WANG Xiang-long;WU Zhang-han(College of Mechatronics and Vehicle Engineering,Weifang University,Weifang 261061,Shandong,China;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;State Key Laboratory of Rolling and Automation,Northeastern University,Shenyang 110819,Liaoning,China;National Engineering Research Center for Silicon Steel,Wuhan Iron and Steel Co.,Ltd.,Wuhan 430080,Hubei,China)

机构地区：[1]潍坊学院机电与车辆工程学院,山东潍坊261061 [2]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [3]东北大学轧制技术与连轧自动化国家重点实验室,辽宁沈阳110819 [4]武汉钢铁有限公司国家硅钢工程技术研究中心,湖北武汉430080

出　　处：《钢铁》2022年第1期126-132,共7页Iron and Steel

基　　金：国家高技术研究发展计划(863计划)资助项目(2012AA03A506)。

摘　　要：为了研究Fe-6.5%Si钢极薄带的制备工艺,并获得良好的产品磁性能,以薄带铸轧试验机制备的6.5%Si钢铸带为原料,分别采用一次温轧法、二次温轧法和基于应变诱导无序(DID)原理的高硅钢室温冷轧3种工艺制备出厚度为0.1 mm的Fe-6.5%Si钢。分析结果显示,一次温轧法退火后以高强度γ织构为主,由于压下率达到90%,形变储能高,晶粒尺寸最大,铁损最低,同时磁感也最低;二次温轧的退火板除了γ织构外,还有较强的η织构,故其磁感值高于一次温轧法,该方法得到的6.5%Si钢薄带综合磁性能最优,但生产成本高,效率低;基于DID原理,对6.5%Si钢热轧板在温度为300~450℃、压下率为45%~65%的条件下进行温轧,实现了6.5%Si钢软化,随后可将6.5%Si钢室温冷轧至0.1 mm,此时温轧板和冷轧板内部有序相消失,基体变成无序态;室温冷轧板退火后晶粒更细,铁损略有升高。此外,室温冷轧可促进{111}<112>形变晶粒在冷轧剪切带中形核形成有利织构,因此磁感值得到更大提升;采用DID原理进行室温冷轧,效率较高,后续可通过优化退火工艺使其进一步降低铁损,该方法为薄带铸轧工艺批量生产磁性能优异的6.5%Si钢极薄带提供技术参考。In order to study preparation process of Fe-6.5%Si steel ultra-thin strip,and gain good magnetic properties,using 6.5%Si steel cast strip manufactured by strip casting machine as raw material,then be rolled through single warm rolling,double warm rolling and room temperature cold rolling based on the theory of deformation induced disordering(DID)to prepare 0.1 mm thickness Fe-6.5%Si steel.The analysis results show that texture of annealed sheet produced by single warm rolling is mainly composed ofγtype with high strength,warm reduction achieved 90%,thus result in high deformation energy,so the annealed sheet has the biggest recrystallization grain size,the lowest iron loss and the lowest magnetic flux density among three processes.Texture of the annealed sheet produced by double warm rolling composed ofγtype andηtype with high strength,which result in higher magnetic flux density than that of single warm rolling.The 6.5%Si steel thin strip produced by double warm rolling has the best comprehensive magnetic properties,this process,on the other hand,with high production costs and low efficiency;On the base of theory of DID,6.5%Si steel hot-rolled sheet′s warm rolling is carried out at 300-450℃and 45%-65%reduction,thus 6.5%Si steel be softened and then be cold rolled at room temperature to 0.1 mm thickness,ordered phase disappeared in warm-rolled sheet and cold-rolled sheet,the matrix is changed into disordered phase.The annealed sheet produced by room temperature cold rolling has smaller recrystallization grain size and little higher iron loss.Since cold rolling promotes{111}<112>deformed grain nucleation at cold-rolled shear band to come into being favorable texture,so magnetic flux density been greater enhanced.On the base of theory of DID,cold rolling at room temperature has high production efficiency,further lower iron loss shall be gained after annealing process optimization,this process provides technical reference for strip casting mass-produce 6.5%Si steel ultra-thin strip with good magnetic properti

关 键 词：6.5%Si钢 一次温轧法 二次温轧法 应变诱导无序 有序相 

分 类 号：TG335.56[金属学及工艺—金属压力加工]