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Title:
ALLOYED HOT-DIP GALVANIZED STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2014/073520
Kind Code:
A1
Abstract:
An alloyed hot-dip galvanized steel sheet in which a parent steel sheet containing a prescribed amount of C, Si, Mn, etc. is used, wherein an alloyed hot-dip galvanized zinc plated layer measuring 3 to 30 μm in thickness and containing 5 to 15% of Fe by mass is applied to the surface of the parent steel sheet, the alloyed hot-dip galvanized steel sheet having a layer (A) that is disposed directly below the surface of the parent steel sheet and extends to a thickness of 2 to 20 μm from the surface of the parent steel sheet and into the parent steel sheet, the layer (A) containing at least 50% by volume of a ferrite structure, at least 90% by mass of Fe in non-oxide form, no more than 10% by mass in total of oxides of Fe, Si, Mn, P, S, and Al, and less than 0.05% by mass of C.

Inventors:
FUJITA, Soshi (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
YAMANAKA, Shintaro (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2013/079858
Publication Date:
May 15, 2014
Filing Date:
November 05, 2013
Export Citation:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
International Classes:
C22C38/00; C21D9/46; C22C18/00; C22C38/06; C22C38/58; C23C2/02; C23C2/06; C23C2/28
Domestic Patent References:
WO2011025042A12011-03-03
Foreign References:
JP2007211280A2007-08-23
JP2011153349A2011-08-11
JP2011231367A2011-11-17
JP2012012655A2012-01-19
JP2012012683A2012-01-19
JPS55122865A1980-09-20
JP2001323355A2001-11-22
JP2008007842A2008-01-17
JP2001279412A2001-10-10
JP2009209397A2009-09-17
JP2010126757A2010-06-10
JP2000309847A2000-11-07
JPS59219473A1984-12-10
Other References:
See also references of EP 2918696A4
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (Hazuki International Yotsuya, Daiichi Tomizawa Building 1-3, Yotsuya 3-chom, Shinjuku-ku Tokyo 04, 〒1600004, JP)
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