Title:
STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/188745
Kind Code:
A1
Abstract:
With respect to a steel sheet being configured to be formed into a complicated shape that makes the press forming difficult, the purpose of the present invention is to provide a steel sheet and a method for producing the same, the steel sheet including a lubricating coating film that has a low sliding resistance at a portion where there is a high crack formation risk when the sheet is press-formed and that has excellent press formation properties at a portion which is subjected to a high surface pressure and at which the occurrence of mold galling is foreseen. The steel sheet has an organic resin coating film formed on each surface thereof at a rate of 0.2 g/m2-2.0 g/m2, the coating film having an indentation composite Young's modulus of 20-50 GPa and an indentation hardness of 0.5-1.5 GPa, or an indentation composite Young's modulus of at least 10 GPa and less than 20 GPa and an indentation hardness of 0.2-0.5 GPa.
Inventors:
AOYAMA TOMOHIRO (JP)
FURUYA SHINICHI (JP)
MATSUDA TAKESHI (JP)
NAKAMICHI HARUO (JP)
FURUYA SHINICHI (JP)
MATSUDA TAKESHI (JP)
NAKAMICHI HARUO (JP)
Application Number:
PCT/JP2023/002151
Publication Date:
October 05, 2023
Filing Date:
January 24, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B32B15/08; B05D5/00; B05D7/14; B05D7/24; C09D7/63; C09D201/00; C23C26/00
Foreign References:
| JP2021147657A | 2021-09-27 | |||
| JP2017105986A | 2017-06-15 | |||
| JP2014144604A | 2014-08-14 | |||
| JP2013221177A | 2013-10-28 | |||
| JP2004098316A | 2004-04-02 | |||
| JPH0890710A | 1996-04-09 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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