Title:
STEEL SHEET AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2023/182114
Kind Code:
A1
Abstract:
Provide is a steel sheet that is subjected to complex forming for which press forming is difficult, exhibits a low sliding resistance in a portion having a risk of cracking during the press forming, and has excellent press formability and good film-removal properties in a portion where the contact pressure is high and the occurrence of mold galling is expected. The steel sheet includes a steel sheet original sheet and a coating formed on at least one surface of the steel sheet original sheet, wherein: the coating includes an organic resin and wax; the arithmetic mean roughness Ra of the steel sheet original sheet is 0.4 µm or more; the organic resin is at least one of an acrylic resin, an epoxy resin, a urethane resin, a phenol resin, a vinyl acetate resin, and a polyester resin; the wax is a polyolefin wax having a melting point of 120-140°C, inclusive, and an average particle diameter of 3.0 µm or less; the percentage of the wax in the coating is 10 mass% or more; and the standard deviation σ of the adhesion amount distribution of the coating per one side of the coating is less than 0.9 g/m2.
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Inventors:
AOYAMA TOMOHIRO (JP)
KOIBUCHI SHUN (JP)
FURUYA SHINICHI (JP)
MATSUDA TAKESHI (JP)
KAWANO TAKASHI (JP)
KOIBUCHI SHUN (JP)
FURUYA SHINICHI (JP)
MATSUDA TAKESHI (JP)
KAWANO TAKASHI (JP)
Application Number:
PCT/JP2023/010198
Publication Date:
September 28, 2023
Filing Date:
March 15, 2023
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B32B15/18; C23C26/00
Foreign References:
| JP2013094784A | 2013-05-20 | |||
| JP2017105986A | 2017-06-15 | |||
| JPH09170059A | 1997-06-30 | |||
| JPH0577357A | 1993-03-30 |
Attorney, Agent or Firm:
KUMASAKA Akira et al. (JP)
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