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Title:
MANUFACTURING METHOD OF COLD-ROLLED STEEL PLATE, AND COLD-ROLLED STEEL PLATE
Document Type and Number:
Japanese Patent JP2010043309
Kind Code:
A
Abstract:

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

After executing the hot rolling and the cold rolling, the oxidation treatment is executed by a direct-firing burner, and successively reduction treatment is 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 elevation rate of 5C/sec in the temperature range of 400-650C.


Inventors:
TADA MASAHIKO
HOSHINO KATSUYA
Application Number:
JP2008206970A
Publication Date:
February 25, 2010
Filing Date:
August 11, 2008
Export Citation:
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Assignee:
JFE STEEL CORP
International Classes:
C23C8/18; C21D9/46; C23C8/80; C22C38/00
Attorney, Agent or Firm:
Kenichiro Ochiai
Kazuhiro Mori