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Title:
MANUFACTURING METHOD OF COLD-ROLLED STEEL PLATE, AND COLD-ROLLED STEEL PLATE
Document Type and Number:
Japanese Patent JP2010043308
Kind Code:
A
Abstract:

To provide a manufacturing method of a cold-rolled steel plate excellent in sliding characteristic and die galling resistance, and the cold-rolled steel plate.

After executing the hot rolling and the cold rolling, the oxidation treatment is executed in the atmosphere containing 0.05% O2 and/or 0.10% H2O, and the reduction treatment is successively executed in the atmosphere containing 1.0-100% H2. Fe-based oxides are formed on a surface by executing the oxidation treatment. Thereafter, by reducing the oxides, a cold-rolled steel plate is obtained, wherein reduced Fe is present on its surface. In the oxidation treatment, the steel plate is preferably heated to 400-900C, and the steel plate is further heated at the temperature raising rate of 5C/sec in the temperature range of 400-650C.


Inventors:
TADA MASAHIKO
HOSHINO KATSUYA
Application Number:
JP2008206969A
Publication Date:
February 25, 2010
Filing Date:
August 11, 2008
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
C23C8/14; C21D1/76; C21D9/46; C23C8/18; C22C38/00; C22C38/60
Domestic Patent References:
JPS5337507A1978-04-06
JPH0551714A1993-03-02
JPH06212383A1994-08-02
JPH06306561A1994-11-01
JPH02236267A1990-09-19
JPH02228466A1990-09-11
JPH02228466A1990-09-11
JP2007131899A2007-05-31
JPS5337507A1978-04-06
JPH0551714A1993-03-02
JPH06212383A1994-08-02
JPH06306561A1994-11-01
JPH02236267A1990-09-19
Attorney, Agent or Firm:
Kenichiro Ochiai
Kazuhiro Mori