Title:
METHOD FOR PRODUCING GALVANIZED STEEL SHEET FOR HOT STAMPING, ALLOYED HOT-DIPPED GALVANIZED STEEL SHEET FOR HOT STAMPING AND METHOD FOR PRODUCING SAME, AND HOT STAMPED COMPONENT
Document Type and Number:
WIPO Patent Application WO/2013/161831
Kind Code:
A1
Abstract:
Provided is a method for producing a plated steel sheet with high Si content for hot stamping, which is capable of suppressing the generation of unplated portions, while maintaining high bonding strength in a welded part in cases where a galvanized steel sheet containing a large amount of Si, namely 0.7% or more of Si is used for hot stamping applications. In this production method, a hot-rolled pickled steel sheet or cold-rolled steel sheet containing 0.10-0.5% by mass of C, 0.7-2.5% by mass of Si, 1.0-3% by mass of Mn and 0.01-0.5% by mass of Al is annealed in a reducing atmosphere and then plated, thereby producing a galvanized steel sheet for hot stamping. This method for producing a galvanized steel sheet for hot stamping is characterized in that the annealing is carried out within the range of 500-700°C for 30-270 seconds.
Inventors:
KOJIMA TAKESHI
IRIE HIROSHI
MINOWA TAKESHI
IRIE HIROSHI
MINOWA TAKESHI
Application Number:
PCT/JP2013/061951
Publication Date:
October 31, 2013
Filing Date:
April 23, 2013
Export Citation:
Assignee:
KOBE STEEL LTD (JP)
International Classes:
C23C2/02; B21D22/20; C21D1/18; C21D1/76; C21D9/00; C21D9/46; C22C38/00; C22C38/06; C22C38/58; C23C2/06; C23C2/28
Domestic Patent References:
| WO2010069588A1 | 2010-06-24 |
Foreign References:
| JP2012041597A | 2012-03-01 | |||
| JP2006037130A | 2006-02-09 | |||
| JP2006037141A | 2006-02-09 | |||
| JP2003126920A | 2003-05-08 | |||
| JP2007169679A | 2007-07-05 | |||
| JP2007056307A | 2007-03-08 | |||
| JP2012098035A | 2012-05-24 | |||
| JP2013011424A | 2013-01-17 |
Other References:
See also references of EP 2843077A4
Attorney, Agent or Firm:
UEKI, Kyuichi et al. (JP)
Hisakazu Ueki (JP)
Hisakazu Ueki (JP)
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