Title:
HIGH-STRENGTH STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2012/042677
Kind Code:
A1
Abstract:
Provided are: a high-strength steel sheet having superior chemical conversion treatability and post-electrodeposition corrosion resistance even if the amount of contained Si is large; and a method for producing the high-strength steel sheet. A steel sheet containing, by mass%, 0.01-0.18% C, 0.4-2.0% Si, 1.0-3.0% Mn, 0.001-1.0% Al, 0.005-0.060% P, and S≤0.01%, the remainder comprising Fe and unavoidable impurities, is continuously annealed, during which in a heating process, the temperature range of the heating furnace temperature of A°C to B°C inclusive (A: 600≤A≤780; and B: 800≤B≤900) has a dew point of the ambient atmosphere of at least -10°C.
Inventors:
FUSHIWAKI YUSUKE (JP)
SUZUKI YOSHITSUGU (JP)
SUZUKI YOSHITSUGU (JP)
Application Number:
PCT/JP2010/067612
Publication Date:
April 05, 2012
Filing Date:
September 30, 2010
Export Citation:
Assignee:
JFE STEEL CORP (JP)
FUSHIWAKI YUSUKE (JP)
SUZUKI YOSHITSUGU (JP)
FUSHIWAKI YUSUKE (JP)
SUZUKI YOSHITSUGU (JP)
International Classes:
C23C8/14; C21D9/46; C22C38/00; C22C38/06; C22C38/58
Domestic Patent References:
| WO2007043273A1 | 2007-04-19 |
Foreign References:
| JP2010126758A | 2010-06-10 | |||
| JP2010053371A | 2010-03-11 | |||
| JPH10110300A | 1998-04-28 | |||
| JPH0919775A | 1997-01-21 |
Other References:
See also references of EP 2623631A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
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Claims:
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