公开(公告)号：EP3141626A1

公开(公告)日：2017-03-15

申请号：EP15788697.9

申请日：2015-05-08

Applicant: Nippon Steel & Sumitomo Metal Corporation

Inventor： ARAI Satoshi ,  HAMAMURA Hideyuki ,  MURAKAMI Kenichi ,  FUJII Hiroyasu ,  KOBAYASHI Hideyuki ,  FUJII Norikazu ,  MIZOKAMI Masato

IPC: C22C38/00 ,  C21D8/12 ,  C21D9/46 ,  H01F1/16 ,  H01F1/18 ,  C22C38/02 ,  C22C38/60

CPC classification number: B23K26/08 ,  B23K26/206 ,  C21D8/1283 ,  C21D8/1288 ,  C21D8/1294 ,  C21D9/46 ,  C21D2201/05 ,  C22C38/00 ,  C22C38/02 ,  H01F1/16 ,  H01F1/18

Abstract: A grain-oriented electrical steel sheet includes: a base steel sheet; a primary film formed on a surface of the base steel sheet; and a tension insulation coating formed on a surface of the primary film, in which a magnetic domain control is performed by irradiating the tension insulation coating with a laser from above. When a strip-like sample having a length of 300 mm in a direction parallel to a rolling direction of the grain-oriented electrical steel sheet and a length of 60 mm in a direction parallel to a transverse direction is extracted from the grain-oriented electrical steel sheet, a range from a surface of the tension insulation coating to a depth position of 5 µm toward the base steel sheet side from an interface between the base steel sheet and the primary film is removed by pickling at least one surface of the sample, and a warpage amount of the sample is thereafter measured, the warpage amount satisfies predetermined conditions.

Abstract translation: 晶粒取向电工钢板包括：基体钢板; 形成在基体钢板的表面上的主要膜; 以及形成在初级膜的表面上的张力绝缘膜，其中通过用上述激光照射张力绝缘涂层进行磁畴控制。 当沿着与取向电工钢板的轧制方向平行的方向上的长度为300mm，与横向平行的方向长度为60mm的带状样品从晶粒取向电极 通过酸洗至少一个样品的表面，除去从张力绝缘涂层的表面到从基材钢板和初始膜之间的界面向基材钢板侧的深度位置的范围， 此后测量样品的翘曲量，翘曲量满足预定条件。