Title:
方向性電磁鋼板の製造方法
Document Type and Number:
Japanese Patent JP5668893
Kind Code:
B2
Abstract:
Provided by the present invention is a method for manufacturing a grain oriented electrical steel sheet using austenite (y) - ferrite (±) transformation which develops excellent magnetic properties, using T ± calculated from the following equation (1) and performing the first pass of rough hot rolling at a temperature of (T ± -100) °C or higher with a rolling reduction of 30 % or more , and further using T ³max calculated from the following equation (2) and performing any one pass of finish hot rolling in a temperature range of (T ³max ±50) °C with a rolling reduction of 40 % or more. T ± °C = 1383.98 - 73.29 % Si + 2426.33 % C + 271.68 % Ni T ³max °C = 1276.47 - 59.24 % Si + 919.22 % C + 149.03 % Ni
where [%A] represents content of element "A" in steel (mass%).
Inventors:
竹中 雅紀
▲高▼宮 俊人
松田 広志
▲高▼宮 俊人
松田 広志
Application Number:
JP2014507453A
Publication Date:
February 12, 2015
Filing Date:
March 29, 2013
Export Citation:
Assignee:
ＪＦＥスチール株式会社
International Classes:
C21D8/12; B21B3/02; B23K15/00; C22C38/00; C22C38/60; H01F1/16
Domestic Patent References:
| JPS55119126A | 1980-09-12 | |||
| JPH05306410A | 1993-11-19 | |||
| JPS54120214A | 1979-09-18 | |||
| JPH08215710A | 1996-08-27 | |||
| JPS5993828A | 1984-05-30 | |||
| JPS55119126A | 1980-09-12 | |||
| JPH05306410A | 1993-11-19 | |||
| JPS54120214A | 1979-09-18 | |||
| JPH08215710A | 1996-08-27 | |||
| JPS5993828A | 1984-05-30 |
Foreign References:
| WO1990013673A1 | 1990-11-15 | |||
| WO1990013673A1 | 1990-11-15 |
Attorney, Agent or Firm:
Kenji Sugimura
Keisuke Kawahara
Keisuke Kawahara