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UNIDIRECTIONALLY GRAIN ORIENTED ELECTROMAGNETIC STEEL SHEET HAVING EXCELLENT FILM ADHESION, AND MET 发明申请

2023-09-19 2160 1989K 0

专利信息

申请日期 2025-07-11 申请号 WOJP07072600
公开(公告)号 WO2008062853A1 公开(公告)日 2008-05-29
公开国别 WO 申请人省市代码 全国
申请人 NIPPON STEEL CORPORATION; KUBO Yuji; NANBA Eiichi; ARAI Satoshi; HONMA Hotaka; MIZUKAMI Kazumi; TANAKA Koki
简介 This invention provides a unidirectionally grain oriented electromagnetic steel sheet comprising, by mass, 2 to 7% of Si and having a primary film composed mainly of forsterite on its surface. The primary film comprises at least one element selected from Ca, Sr and Ba, a rare earth metal element, and a sulfur-containing compound (A). According to the above constitution, the compound (A) is present in the interface layer between the primary film and the steel sheet. As a result, in the manufacture of a wound core transformer or the like, the separation of a primary film caused in a highly bending part can be prevented.


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