Title:
方向性電磁鋼板およびその製造方法
Document Type and Number:
Japanese Patent JP6687919
Kind Code:
B2
Abstract:
To provide an oriented electromagnetic steel sheet not only excellent in magnetic property, but also excellent in film characteristics after stress relieving annealing, and a manufacturing method therefor.SOLUTION: There is provided a manufacturing method of an oriented electromagnetic steel sheet including a series of processed by hot rolling a steel raw material containing, by mass, C:0.03 to 0.08%, Si:2.5 to 4.5% and Mn:0.03 to 0.30% to prepare a hot rolled sheet, cold rolling the same and conducting decarbonization annealing also worked as primary recrystallization annealing, then applying an annealing separation agent on a steel sheet surface, and conducting finish annealing, the oriented electromagnetic steel sheet having average of standard deviation with O strength when a forsterite ground coated film surface is mapping analyzed with EPMA of 0.15 or less by depositing 25/μmor more of metal particles with average particle diameter of 70 nm or less on a steel sheet surface between cold rolling to decarbonization annealing to prepare final sheet thickness.SELECTED DRAWING: Figure 1
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Inventors:
Makoto Watanabe
Toshiaki Takamiya
Kei Terashima
Ryuichi Suehiro
Kichi Saki Soichiro
Toshiaki Takamiya
Kei Terashima
Ryuichi Suehiro
Kichi Saki Soichiro
Application Number:
JP2019024684A
Publication Date:
April 28, 2020
Filing Date:
February 14, 2019
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
C22C38/00; C21D8/12; C21D9/46; C22C38/04; C22C38/60; C23C22/00; C23C22/78
Domestic Patent References:
| JP9087744A | ||||
| JP2005240096A | ||||
| JP2008144231A | ||||
| JP2002266027A | ||||
| JP5195239A |
Attorney, Agent or Firm:
Ginza Marronnier Patent Office