METHOD FOR MANUFACTURING NON-ORIENTED ELECTROMAGNETIC STEEL SHEET
    74.
    发明申请
    METHOD FOR MANUFACTURING NON-ORIENTED ELECTROMAGNETIC STEEL SHEET 有权
    制造非定向电磁钢板的方法

    公开(公告)号:US20150136278A1

    公开(公告)日:2015-05-21

    申请号:US14413589

    申请日:2013-08-08

    Abstract: Provided is a method for stably obtaining a non-oriented electrical steel sheet with high magnetic flux density and excellent productivity, at a low cost by casting in a continuous casting machine a slab having a chemical composition including by mass %, C: 0.0050% or less, Si: more than 3.0% and 5.0% or less, Mn: 0.10% or less, Al: 0.0010% or less, P: more than 0.040% and 0.2% or less, N: 0.0040% or less, S: 0.0003% or more and 0.0050% or less, Ca: 0.0015% or more, and total of at least one element selected from Sn and Sb: 0.01% or more and 0.1% or less, balance including Fe and incidental impurities, subjecting the slab to heating, then subjecting the slab to hot rolling to obtain a hot rolled steel sheet, then subjecting the steel sheet to hot band annealing, pickling, subsequent single cold rolling to obtain a final sheet thickness, then subjecting the steel sheet to final annealing, wherein in the hot band annealing, soaking temperature is 900° C. or higher and 1050° C. or lower, and cooling rate after soaking is 5° C./s or more.

    Abstract translation: 本发明提供一种通过在连续铸造机中铸造具有质量%C:0.0050%的化学成分的板坯而以低的成本稳定地获得具有高磁通密度和优异的生产率的无取向电工钢板的方法,或者 较少,Si:3.0%以上5.0%以下,Mn:0.10%以下,Al:0.0010%以下,P:大于0.040%,0.2%以下,N:0.0040%以下,S:0.0003 %以上且0.0050%以下,Ca:0.0015%以上,以及选自Sn和Sb中的至少一种元素的总和:0.01%以上且0.1%以下,余量包括Fe和附带杂质, 加热,然后对板坯进行热轧以获得热轧钢板,然后对钢板进行热带退火,酸洗,随后的单次冷轧以获得最终的板厚,然后对钢板进行最终退火,其中 在热带退火中,均热温度为900℃以上且1050℃以下 ,浸泡后的冷却速度为5℃/ s以上。

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