Title:
HIGH STRENGTH THIN STEEL SHEET AND PRODUCING METHOD THEREFOR
Document Type and Number:
Japanese Patent JP2005248259
Kind Code:
A
Abstract:
To provide a high strength thin steel sheet excellent in fatigue strength and formability by satisfying both of the fatigue characteristic and the formability.
In the high strength thin steel sheet provided with simple state surface formation having 0.3-1.5 μm Ra, this steel sheet is provided with a range having ≥100 MPa the absolute value of a compressed residual stress on the surface layer part in the range of 2-10% sheet thickness.
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Inventors:
KIMURA YUKIO
UENO MASAYASU
SOTANI YASUHIRO
UENO MASAYASU
SOTANI YASUHIRO
Application Number:
JP2004060841A
Publication Date:
September 15, 2005
Filing Date:
March 04, 2004
Export Citation:
Assignee:
JFE STEEL KK
International Classes:
B24C1/10; B21D31/06; C21D7/06; C22C38/00; (IPC1-7): C21D7/06; B24C1/10; C22C38/00
Domestic Patent References:
| JP2002285237A | 2002-10-03 | |||
| JP2003311314A | 2003-11-05 |
Attorney, Agent or Firm:
Toshiaki Hosoe