Title:
HIGH-STRENGTH STEEL PLATE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2014/017011
Kind Code:
A1
Abstract:
Provided are: a high-strength steel plate having superior chemical conversion treatment characteristics and superior post-electrodeposition corrosion resistance even if there is a high content of Si and Mn; and a method for producing same. During continuous annealing of a steel plate containing, by mass%, 0.03-0.35% of C, 0.01-0.50% of Si, 3.6-8.0% of Mn, 0.01-1.0% of Al, ≤0.10% of P, and ≤0.010% of S, the remainder comprising Fe and unavoidable impurities, the greatest temperature the steel plate reaches within an annealing furnace is 600-750°C inclusive, and the time of passage of the steel plate in a temperature region at which the steel plate temperature is 600-750°C inclusive is 30 seconds to 10 minutes inclusive, and the dew point of the atmosphere is at least -10°C.
Inventors:
FUSHIWAKI YUSUKE (JP)
KAWASAKI YOSHIYASU (JP)
NAGATAKI YASUNOBU (JP)
KAWASAKI YOSHIYASU (JP)
NAGATAKI YASUNOBU (JP)
Application Number:
PCT/JP2013/003802
Publication Date:
January 30, 2014
Filing Date:
June 18, 2013
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
C21D9/46; C22C38/06; C22C38/58; C25F1/06
Foreign References:
| JP2011514436A | 2011-05-06 | |||
| JP2010150660A | 2010-07-08 |
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Akira Kumasaka (JP)
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