公开(公告)号：EP2006397A1

公开(公告)日：2008-12-24

申请号：EP07740934.0

申请日：2007-03-28

申请人： Nippon Steel Engineering Corporation

发明人： SAKAI, Tatsuhiko ,  HAMAMURA, Hideyuki

IPC分类号： C21D8/12 ,  B23K26/00 ,  B23K26/40 ,  H01F1/16 ,  H01F41/02

CPC分类号： C21D8/1294 ,  B23K26/0057 ,  B23K26/0626 ,  B23K26/082 ,  B23K26/0821 ,  B23K2201/16 ,  B23K2201/18 ,  B23K2203/04 ,  C21D8/12

摘要： The present invention provides a method of production of grain-oriented electrical steel sheet greatly reducing the Watt loss of the grain-oriented electrical steel sheet and making the magnetostriction as small as possible, that is, a method of production of grain-oriented electrical steel sheet with small magnetostriction by improving the magnetic properties by irradiation by a finely focused laser beam comprising using a power modulated laser controlled in maximum power density to 1 × 10 2 to 1 × 10 4 W/mm 2 to optimize the amount of strain given by laser irradiation in both the sheet width direction and rolling direction and, in particular, to make the modulation duty 70% to less than 100%.

摘要翻译： 本发明提供了一种大幅降低晶粒取向电工钢板的瓦特损耗并使磁致伸缩尽可能小的方向性电磁钢板的制造方法，即，取向电工钢的制造方法 通过利用精细聚焦的激光束的照射改善磁特性的片状物，包括使用以最大功率密度控制的功率调制激光器为1×10 2至1×10 4 W / mm 2，以优化由 在片材宽度方向和轧制方向上的激光照射，特别是使调制度为70％以上且小于100％。