薄带连铸流程制备0.1 mm无取向硅钢极薄带的研究

电工钢 ›› 2021, Vol. 3 ›› Issue (1): 22-.

薄带连铸流程制备0.1 mm无取向硅钢极薄带的研究

付珊，魏庆庆，陈冬梅，刘海涛

东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳 110819

出版日期:2021-02-28 发布日期:2021-02-25

Study of 0.1 mm ultrathin nonoriented silicon steel fabricated by strip casting

FU Shan, WEI Qingqing, CHEN Dongmei, LIU Haitao

State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, China

Online:2021-02-28 Published:2021-02-25

摘要/Abstract

摘要： 以Fe-3.2 %Si-0.7 %Al无取向硅钢为研究对象，采用薄带连铸流程制备出0.1 mm极薄规格无取向硅钢，并系统
地研究了全流程组织、织构的演变和一次冷轧法、二次冷轧法对组织、织构及磁性能的影响规律。结果表明：铸带组织为典型的柱状晶组织，经一次冷轧退火后得到的组织为等轴铁素体晶粒，对应的织构主要以α*织构和γ织构为主；最终成品板磁感
B50为1.681 T,远高于日本ST-100的磁感1.65 T，铁损值也较高，可能与实验室条件下钢的纯净度较低有关。因此，薄带连铸流程制备出无取向硅钢可显著提高磁感。与一次冷轧法相比，二次冷轧法制备的无取向硅钢极薄带的晶粒尺寸较大且分布均匀，不利的γ织构显著减弱；最终成品板铁损显著降低，磁感B50由1.681 T进一步升高至1.734 T。

关键词: 无取向硅钢, 极薄带, 组织, 织构, 磁性能

Abstract: The 0.1 mm thick Fe3.2%Si0.7%Al ultrathin nonoriented silicon steel were successfully produced by strip casting. The microstructure, texture evolution throughout the whole processing and effect of onestage and twostage cold rolling methods on magnetic properties were investigated in detail. The results showed that the microstructure of cast strip was characterized by typical columnar grains. Equiaxed ferrite grains were obtained after onestage cold rolling and annealing, and the associated texture was dominated by α*fiber and γfiber texture. The magnetic induction B50 of final annealed sheets was 1.681 T, which was much higher than that of ST100 in Japanese. The higher iron loss might be related to the lower purity of steel under laboratory conditions. Therefore, the magnetic induction of nonoriented silicon steels produced by strip casting significantly improved. Compared with the onestage cold rolling method, the grain size of final annealed sheets produced by the twostage cold rolling method was larger, and the unfavorable γfiber texture weakened, resulting in the iron loss obviously reduced and magnetic induction B50 increased from 1.681 T to 1.734 T.

Key words: nonoriented silicon steel, ultrathin strip, microstructure, texture, magnetic properties

付珊, 魏庆庆, 陈冬梅, 刘海涛. 薄带连铸流程制备0.1 mm无取向硅钢极薄带的研究[J]. 电工钢, 2021, 3(1): 22-.

FU Shan, WEI Qingqing, CHEN Dongmei, LIU Haitao. Study of 0.1 mm ultrathin nonoriented silicon steel fabricated by strip casting[J]. Electrical Steel, 2021, 3(1): 22-.

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