发明申请
US20220002831A1 METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND GRAIN-ORIENTED ELECTRICAL STEEL SHEET
有权
基本信息:
- 专利标题： METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND GRAIN-ORIENTED ELECTRICAL STEEL SHEET
- 申请号：US17421309 申请日：2020-01-08
- 公开(公告)号：US20220002831A1 公开(公告)日：2022-01-06
- 发明人： Nobusato MORISHIGE , Ryutaro YAMAGATA , Ichiro TANAKA , Takashi KATAOKA , Haruhiko ATSUMI , Yoshihiro SUWA , Kazumi MIZUKAMI
- 申请人： NIPPON STEEL CORPORATION
- 申请人地址： JP Tokyo
- 专利权人： NIPPON STEEL CORPORATION
- 当前专利权人： NIPPON STEEL CORPORATION
- 当前专利权人地址： JP Tokyo
- 优先权： JP2019-001165 20190108
- 国际申请： PCT/JP2020/000344 WO 20200108
- 主分类号： C21D9/46
- IPC分类号： C21D9/46 ; C21D8/12 ; C21D8/00 ; C21D6/00 ; C22C38/06 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; H01F1/147
摘要：
Grain-oriented electrical steel sheet excellent in coating adhesion and magnetic properties is provided. The method for manufacturing grain-oriented electrical steel sheet excellent in coating adhesion and magnetic properties includes a process of heating to 1280° C. or more and hot rolling a slab containing, by mass %, Bi and a predetermined composition of constituents and having a balance of Fe and impurities so as to obtain hot rolled steel sheet, a process, after hot rolling annealing the hot rolled steel sheet, of cold rolling it one time or cold rolling it two times or more with process annealing performed interposed so as to obtain cold rolled steel sheet, a process of rapidly heating then decarburization annealing the steel sheet, a process of coating the surface of the cold rolled steel sheet after decarburization annealing with an annealing separator containing predetermined compounds including sulfates or sulfides and having MgO as its main constituent, then performing finish annealing, a process of performing strictly controlled finish annealing, and a process of coating an insulating coating, then performing flattening annealing.
公开/授权文献:
IPC结构图谱:
| C | 化学；冶金 |
| --C21 | 铁的冶金 |
| ----C21D | 改变黑色金属的物理结构；黑色或有色金属或合金热处理用的一般设备；通过脱碳、回火或其他处理使金属具有韧性 |
| ------C21D9/00 | 热处理，例如适合于特殊产品的退火、硬化、淬火、回火；所用的炉子 |
| --------C21D9/46 | .用于金属薄板 |