Title:
GALVANIZED STEEL SHEET FOR HOT PRESSING AND METHOD FOR PRODUCING HOT PRESSED MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2017/057570
Kind Code:
A1
Abstract:
Provided are a galvanized steel sheet by which, in a hot pressing process, heating for suppressing generation of LME cracks can be effected in a short time; and a galvanized steel sheet for hot pressing, which is obtained by subjecting the galvanized steel sheet to hot pressing. This galvanized steel sheet for hot pressing is a galvanized steel sheet that is used in hot pressing, and is characterized in that internal oxides are present on the base steel sheet side of an interface between a galvanizing layer and the base steel sheet and in that the base steel sheet contains stipulated quantities of C, Si, Mn and Cr, with the remainder comprising iron and unavoidable impurities, and satisfies formula (1). Formula (1): (2×[Si]/28.1+[Mn]/54.9+1.5×[Cr]/52.0) ≥ 0.05
In formula (1), [Si] denotes the content in terms of mass% of Si in the base steel sheet, [Mn] denotes the content in terms of mass% of Mn in the base steel sheet, and [Cr] denotes the content in terms of mass% of Cr in the base steel sheet.
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Inventors:
OTOMO RYOSUKE
TAKEDA MIKAKO
TAKEDA MIKAKO
Application Number:
PCT/JP2016/078814
Publication Date:
April 06, 2017
Filing Date:
September 29, 2016
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C22C38/00; B21D22/20; C21D1/18; C21D9/00; C22C38/38; C22C38/58; C23C2/02; C23C2/06; C21D9/46
Domestic Patent References:
WO2014199923A1 | 2014-12-18 | |||
WO2013047820A1 | 2013-04-04 | |||
WO2015033177A1 | 2015-03-12 | |||
WO2015007723A1 | 2015-01-22 |
Foreign References:
JP2014159624A | 2014-09-04 | |||
JP2014224311A | 2014-12-04 |
Other References:
See also references of EP 3358032A4
Attorney, Agent or Firm:
SAMEJIMA, Mutsumi et al. (JP)
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