Title:
STEEL SHEET, TAILORED BLANK, HOT-PRESSED MOLDED PRODUCT, STEEL PIPE, AND HOLLOW QUENCHED MOLDED PRODUCT
Document Type and Number:
WIPO Patent Application WO/2020/202474
Kind Code:
A1
Abstract:
A steel sheet in which an intermetallic compound layer containing iron and aluminum and an aluminum plating layer are provided in said order on both surfaces of a base steel sheet, and which satisfies expression (1): b1 (µm) > b0 (µm), expression (2): 3 µm ≤ b0 (µm) ≤ 10 µm, and expression (3): 0.8% ≤ {2 x (a1 (µm) + b1 (µm))/t0 (µm)} x 100 ≤ 3.5%, wherein the thickness of the aluminum plating layer and the thickness of the intermetallic compound layer (IMC0) per one surface at a part other than the edge part of the steel sheet are set as a0 µm and b0 µm, respectively, the thickness of the aluminum plating layer and the thickness of the intermetallic compound layer (IMC1) per one surface at least at a part of the edge part of the steel sheet are set as a1 µm and b1 µm, respectively, and the sheet thickness of the base steel sheet at the part other than the edge part is defined as t0 µm.
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Inventors:
TATSUMI YUJIRO (JP)
FUJIMOTO HIROKI (JP)
YASUYAMA MASANORI (JP)
MIYAZAKI YASUNOBU (JP)
SUZUKI YUKI (JP)
FUJIMOTO HIROKI (JP)
YASUYAMA MASANORI (JP)
MIYAZAKI YASUNOBU (JP)
SUZUKI YUKI (JP)
Application Number:
PCT/JP2019/014687
Publication Date:
October 08, 2020
Filing Date:
April 02, 2019
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C2/12; B21D22/20; C21D1/18; C21D9/00; C22C38/00; C22C38/58
Domestic Patent References:
| WO2018096387A1 | 2018-05-31 |
Foreign References:
| JP2017518438A | 2017-07-06 | |||
| JP2009534529A | 2009-09-24 | |||
| JP2017514694A | 2017-06-08 |
Attorney, Agent or Firm:
TAIYO, NAKAJIMA & KATO (JP)
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