公开(公告)号：US06482271B2

公开(公告)日：2002-11-19

申请号：US09841019

申请日：2001-04-24

申请人： Tatsuhiko Sakai ,  Naoya Hamada

发明人： Tatsuhiko Sakai ,  Naoya Hamada

IPC分类号： C12D812

CPC分类号： C21D8/1294 ,  C21D9/46 ,  C21D2221/00

摘要： The present invention relates to a grain-oriented electrical steel sheet excellent in magnetic properties, which are improved by irradiating laser beams onto the positions paired on the both surfaces of the steel sheet and forming fine closure domains, characterized in that the width of the closure domains in the rolling direction is 0.3 mm or less and the deviation in the rolling direction between the positions of the paired closure domains on the both surfaces is equal to or smaller than the width of said closure domains in the rolling direction. Further, the present invention relates to a grain-oriented electrical steel sheet excellent in magnetic properties, characterized in that the steel sheet has the marks of laser irradiation on its surface. Yet further, the present invention relates to a grain-oriented electrical steel sheet excellent in magnetic properties, characterized in that the substrate steel is not exposed at the portions of laser irradiation on the surface of the steel sheet.

摘要翻译： 本发明涉及一种磁性能优异的方向性电磁钢板，其通过将激光束照射在钢板两面上形成的位置并形成精细闭合区域而得到改善，其特征在于，封闭件的宽度 轧制方向的区域为0.3mm以下，两面的成对封闭畴的位置之间的轧制方向的偏差等于或小于所述封闭畴在轧制方向上的宽度。 此外，本发明涉及磁性能优异的方向性电磁钢板，其特征在于，所述钢板在其表面具有激光照射的标记。 此外，本发明涉及磁性能优异的方向性电磁钢板，其特征在于，在钢板表面上的激光照射部分，基板钢不露出。