Title:
グラス被膜のない方向性電磁鋼板用原板とその製造方法及び絶縁被膜の密着性が良好な方向性電磁鋼板の製造方法
Document Type and Number:
Japanese Patent JP6911598
Kind Code:
B2
Abstract:
To obtain the adhesion of a tension film even when forming an external oxidation layer by thermal oxidation annealing at a soaking temperature of 1,000°C or less before forming the tension film.SOLUTION: In an original sheet for a grain-oriented silicon electromagnetic sheet having no glass coating film before forming a tension film, an oxygen content x per one surface of a steel sheet and a value y of SiOpeak (ΔR/R@1,250 cm) on the surface of the steel sheet obtained by reflection type infrared emission spectroscopy satisfy y≥1,500x. A method for manufacturing the original sheet for the grain-oriented electromagnetic steel sheet having no glass coating film includes subjecting a finish-annealed grain-oriented silicon steel sheet having no glass coating film on the surface of the steel sheet to thermal oxidation annealing at a soaking temperature of 1,000°C or less in an atmosphere having an oxidation potential of 0.005 or less shown by a ratio P/Pof water vapor pressure to hydrogen pressure to form an external oxidation layer including SiOas a main component on the surface of the steel sheet.SELECTED DRAWING: Figure 1
Inventors:
Shuichi Nakamura
Takebayashi Seiki
Yoshiyuki Ushigami
Takaya Shinsuke
Hiroyasu Fujii
Takebayashi Seiki
Yoshiyuki Ushigami
Takaya Shinsuke
Hiroyasu Fujii
Application Number:
JP2017137423A
Publication Date:
July 28, 2021
Filing Date:
July 13, 2017
Export Citation:
Assignee:
Nippon Steel Corporation
International Classes:
C23C22/00; C23C22/78; C23C28/04; H01F1/147
Domestic Patent References:
| JP6184762A | ||||
| JP11241171A | ||||
| JP2002322566A | ||||
| JP2004027345A | ||||
| JP5311239A | ||||
| JP60131976A | ||||
| JP7278833A |
Attorney, Agent or Firm:
Atsushi Aoki
Shinji Mitsuhashi
Fukuchi Ritsuo
Manabu Saito
Hiroshi Kamematsu
Shinji Mitsuhashi
Fukuchi Ritsuo
Manabu Saito
Hiroshi Kamematsu