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.
HOSHINO KATSUYA
JPS5337507A | 1978-04-06 | |||
JPH0551714A | 1993-03-02 | |||
JPH06212383A | 1994-08-02 | |||
JPH06306561A | 1994-11-01 | |||
JPH02236267A | 1990-09-19 | |||
JPH02228466A | 1990-09-11 | |||
JPH02228466A | 1990-09-11 | |||
JP2007131899A | 2007-05-31 | |||
JPS5337507A | 1978-04-06 | |||
JPH0551714A | 1993-03-02 | |||
JPH06212383A | 1994-08-02 | |||
JPH06306561A | 1994-11-01 | |||
JPH02236267A | 1990-09-19 |
Kazuhiro Mori