Title:
方向性電磁鋼板の製造方法
Document Type and Number:
Japanese Patent JP5842410
Kind Code:
B2
Abstract:
A method of manufacturing a grain oriented electrical steel sheet includes subjecting a steel slab to rolling to obtain a steel sheet, subjecting the steel sheet to decarburizing annealing, coating of an annealing separator mainly composed of MgO onto a surface of the steel sheet, and final annealing to obtain a grain oriented electrical steel sheet having at least 4.0 g/m2 of coating weight of forsterite coating formed on the surface of the steel sheet, 0.9 mum or less of the average grain size of the forsterite coating, and at least 1.91 T of magnetic flux density B8; and linearly irradiating a surface of the grain oriented electrical steel sheet this obtained with a laser having wavelength of 0.2 mum to 0.9 mum in a direction intersecting the rolling direction of the steel sheet.
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Inventors:
Hiroshi Yamaguchi
Seiji Okabe
Kunihiro Senda
Takeshi Omura
Seiji Okabe
Kunihiro Senda
Takeshi Omura
Application Number:
JP2011144841A
Publication Date:
January 13, 2016
Filing Date:
June 29, 2011
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C21D8/12; C22C38/00; H01F1/16; H01F1/18
Domestic Patent References:
| JP9184017A | ||||
| JP2000063950A |
Other References:
SATISH V. PONNALURI ET AL.,Core loss reduction in grain-oriented silicon steels by excimer laser scribing Part I: experimental work,JOURNAL OF MATERIALS PROCESSING TECHNOLOGY,2001年,vol. 112,pages 199 - 204
Attorney, Agent or Firm:
Kenji Sugimura
Yamaguchi Yusuke
Kengo Yoshida
Yamaguchi Yusuke
Kengo Yoshida