高温卷取的热轧态原料与常化态原料生产高牌号无取向硅钢的比较  

Comprised of hot rolled material with high temperature coiling and normalization material for the production of high grade nonoriented silicon steel

作　　者：叶铁[1,2] 周成[1] 高振宇[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]鞍钢股份有限公司冷轧硅钢厂,辽宁鞍山114001

出　　处：《功能材料》2014年第3期110-114,120,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50171007)

摘　　要：研究了采用高温卷取热轧态原料和常化态原料生产高牌号冷轧无取向电工钢组织、织构和磁性能。研究发现钢卷采用750℃高温卷取,下线后立即采用"保温罩"对钢卷进行保温,时间96h,然后空冷至100℃时上线生产的工艺可取代常化工艺生产高牌号冷轧无取向电工钢。冷轧上线前,热轧态原料的表层为大量的再结晶组织,这部分组织包括了热轧轧制时保留下来的动态再结晶组织,钢卷本身高温回复后产生再结晶晶粒,以及在保温罩内保温时形成的再结晶组织。高温卷取的热轧态和常化态的热轧卷作为原料时,试样织构类型相似,取向分布密度接近,再结晶后织构类型仍然相似,取向分布密度仍然接近。Goss织构对磁性能增加有促进作用。实验钢中较好的磁性能对应的织构[{100}+Goss]/{111}的比值较高,体现了织构的遗传性。Microstructure,texture and magnetic properties of high grade cold rolled nonoriented electrical steel which made of hot rolled material with high temperature coiling and with normalization were studied.Steels coiled in high temperature （at 750 ℃）,stacked with insulation cover for 96 h and air cooled to 100 ℃ were using to manufacture high grade nonoriented electrical steel.The process can replace the normalization process. There are a lot of recrystallized grains in the surface layer of the coil with high temperature coiling.These re-crystallized grains included the dynamically recrystallized microstructure which formed by surface friction be-tween the hot rolling rollers;formed by high temperature of the steel plate selves and formed by the coil stacked densely in the warehouse at 750 ℃.Texture types and orientation distribution density of hot rolled ma-terial with high temperature coiling and with normalization are similar.After recrystallization texture types and orientation distribution density are still similar.Goss texture promoted magnetic properties.The ratio of tex-tures of [{100}＋Goss]/{1 1 1}reflects heritable and the higher the ratio,the better magnetic properties are in these steels tested.

关 键 词：无取向电工钢 高温卷取 常化 磁性能 

分 类 号：TM275[一般工业技术—材料科学与工程]