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    MANUFACTURE METHOD OF ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE
    5.
    发明授权
    MANUFACTURE METHOD OF ORIENTED SILICON STEEL HAVING GOOD MAGNETIC PERFORMANCE 有权
    一种具有良好磁性能的取向硅钢的制造方法

    公开(公告)号：EP2644715B1

    公开(公告)日：2018-04-25

    申请号：EP11842864.8

    申请日：2011-04-28

    申请人： Baoshan Iron & Steel Co., Ltd.

    发明人： WU, Meihong ,  JIN, Weizhong ,  SUN, Huande ,  YANG, Guohua ,  SHEN, Kanyi ,  HUANG, Jie ,  HU, Deyang ,  LI, Guobao

    IPC分类号： C21D8/12 ,  B21B37/48

    CPC分类号： C21D8/12 ,  C21D8/1244 ,  C21D8/1272 ,  C21D8/1277 ,  C21D8/1283 ,  C21D2201/05 ,  C21D2211/008

    摘要： A method for manufacturing a grain-oriented silicon steel having excellent magnetic performance, comprising steps as follows 1) conventionally melting and casting into a steel blank; 2) heating the steel blank and hot rolling the same into a strip of steel; 3)normalizing process; carrying out the normalizing process having two stages, wherein the strip is firstly heated to 1100ˆ¼1200°C, then cooled to 900ˆ¼1000 °C within 50-200s; and next, the strip is rapidly cooled in water having a temperature of 10ˆ¼100; in this period, a tension force is applied to the strip of steel, the strip of steel in the temperature range of 900°Cˆ¼500°C has a stress of 1ˆ¼200N/mm 2 ; 4)cold rolling, i.e. carrying out a primary cold rolling, or a double cold rolling with intermediate annealing; 5)carrying out primary recrystallizing annealing, then coating an annealing separator, whose main composition is MgO, to carry out final product annealing comprising secondary recrystallizing annealing and purifying annealing. The invention optimizes the content and distribution of martensite in the steel plate after normalization by adjusting the tension force applied to the steel plate while normalization transformation, so as to make the content of martensite in the range ensuring a better magnetic performance of the final product and to optimize the magnetic performance of final products.

    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR
    6.
    发明公开
    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR 审中-公开

    公开(公告)号：EP3263720A4

    公开(公告)日：2018-03-07

    申请号：EP16754930

    申请日：2016-02-12

    申请人： JFE STEEL CORP

    发明人： TAKAJO SHIGEHIRO ,  OMURA TAKESHI ,  OKABE SEIJI

    IPC分类号： C21D8/12 ,  C21D9/46 ,  H01F1/16

    CPC分类号： C21D8/1294 ,  C21D8/12 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  H01F1/16 ,  H01F27/245

    摘要： Disclosed are a grain-oriented electrical steel sheet exhibiting low iron loss and low noise properties when incorporated in a transformer, and a production method therefor. The steel sheet has strain regions locally present in a surface layer thereof and formed to extend in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region formed continuously over 200 mm in a width direction and whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: W max / W min = 1.2 or more and less than 2.5, where W max and W min respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; W ave being 80 µm or more, where W ave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 µm or more, where D denotes a maximum depth as measured in the sheet thickness direction; and ( W ave * D )/ s being 0.0007 mm or more and 0.0016 mm or less.

    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR
    8.
    发明公开
    GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND PRODUCTION METHOD THEREFOR 审中-公开
    晶粒取向的电工钢板及其生产方法

    公开(公告)号：EP3263720A1

    公开(公告)日：2018-01-03

    申请号：EP16754930.2

    申请日：2016-02-12

    申请人： JFE Steel Corporation

    发明人： TAKAJO, Shigehiro ,  OMURA, Takeshi ,  OKABE, Seiji

    IPC分类号： C21D8/12 ,  C21D9/46 ,  H01F1/16

    CPC分类号： C21D8/1294 ,  C21D8/12 ,  C21D8/1288 ,  C21D9/46 ,  C21D2201/05 ,  H01F1/16 ,  H01F27/245

    摘要： Disclosed are a grain-oriented electrical steel sheet exhibiting low iron loss and low noise properties when incorporated in a transformer, and a production method therefor. The steel sheet has strain regions locally present in a surface layer thereof and formed to extend in a direction transverse to a rolling direction at periodic interval s (mm) in the rolling direction. Each strain region has a closure domain region formed continuously over 200 mm in a width direction and whose width in the rolling direction varies periodically on a steel sheet surface. Each closure domain region satisfies: W max / W min = 1.2 or more and less than 2.5, where W max and W min respectively denote a maximum width and a minimum width on the steel sheet surface as measured in the rolling direction; W ave being 80 µm or more, where W ave denotes an average width on the steel sheet surface as measured in the rolling direction; D being 32 µm or more, where D denotes a maximum depth as measured in the sheet thickness direction; and ( W ave * D )/ s being 0.0007 mm or more and 0.0016 mm or less.

    摘要翻译： 本发明提供一种组装于变压器时显示低铁损，低噪音特性的晶粒取向电工钢板及其制造方法。 该钢板在其表层局部存在应变区域，并且在轧制方向上以间隔s（mm）在与轧制方向垂直的方向上延伸地形成。 每个应变区具有在宽度方向上连续形成200mm的闭合区域区域，并且其在轧制方向上的宽度在钢板表面上周期性变化。 每个闭合区域区域满足：Wmax / Wmin = 1.2以上且小于2.5，其中Wmax和Wmin分别表示在轧制方向上测量的钢板表面上的最大宽度和最小宽度; 波形为80μm以上，其中Wave表示在轧制方向上测量的钢板表面上的平均宽度; D为32μm以上，其中D表示在板厚度方向上测量的最大深度; （波* D）/秒为0.0007mm以上且0.0016mm以下。