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Title:
HIGH-STRENGTH HOT-DIP GALVANIZED STEEL PLATE AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2010/114174
Kind Code:
A1
Abstract:
Provided is a method for producing a high-strength hot-dip galvanized steel plate having a galvanized layer formed on the surfaces of a steel plate containing, in terms of mass%, C (0.01 to 0.18%), Si (0.02 to 2.0%), Mn (1.0 to 3.0%), Al (0.001 to 1.0%), P (0.005 to 0.060%), S (0.01% or less), and Fe and unavoidable impurities as the remainder such that the amount of adhesion of zinc per surface is from 20 to 120 g/m2, wherein, when the steel plate is subjected to annealing and hot-dip galvanizing treatments in continuous hot-dip galvanizing equipment, the temperature in an annealing furnace in a range of 750˚C or higher is regulated such that the dew point of the atmosphere is -40˚C or lower. According to this production method, a high-strength hot-dip galvanized steel plate having excellent corrosion resistance and also excellent resistance to galvanized coat peeling when subjected to a high degree of processing is obtained.

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Inventors:
FUSHIWAKI YUSUKE (JP)
SUGIMOTO YOSHIHARU (JP)
YOSHIDA MASAHIRO (JP)
SUZUKI YOSHITSUGU (JP)
Application Number:
PCT/JP2010/056287
Publication Date:
October 07, 2010
Filing Date:
March 31, 2010
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
FUSHIWAKI YUSUKE (JP)
SUGIMOTO YOSHIHARU (JP)
YOSHIDA MASAHIRO (JP)
SUZUKI YOSHITSUGU (JP)
International Classes:
C23C2/02; C21D1/74; C21D9/46; C22C18/00; C22C38/00; C22C38/06; C22C38/58; C23C2/06; C23C2/28
Foreign References:
JP2008163388A2008-07-17
JP2007146242A2007-06-14
JP2004323970A2004-11-18
JP2004315960A2004-11-11
JP2006233333A2006-09-07
Other References:
"Kinzoku Butsuri Kagaku", 20 May 1996, THE JAPAN INSTITUTE OF METALS, pages: 72 - 73
See also references of EP 2407572A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
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