Title:
ALUMINUM-PLATED STEEL SHEET FOR HOT STAMPING
Document Type and Number:
WIPO Patent Application WO/2024/048504
Kind Code:
A1
Abstract:
This aluminum-plated steel sheet for hot stamping comprises a base steel sheet, an aluminum plating layer that is provided on at least one surface of the base steel sheet, and a surface treatment film that is provided on the aluminum plating layer; the surface treatment film contains a compound A that contains carbon and a compound B that is an oxide or fluoride of a metal element M and has a rutile structure; the carbon concentration of the compound A is 80% by mass or more; and the concentration of the metal element M satisfies formula (1) and formula (2). (1): 1 ≤ CbM ≤ 40
(2): 1.5 ≤ CbM/CtM ≤ 10.0
If H (µm) is the average thickness of the surface treatment film, CtM in formula (2) is the concentration, in mass%, of the metal element M at a position of 0.05H from the surface of the surface treatment film, and CbM in formula (1) and formula (2) is the concentration, in mass%, of the metal element M at a position of 0.95H from the surface of the surface treatment film.
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Inventors:
SUZUKI YUKI (JP)
FUJITA SOSHI (JP)
IRIKAWA HIDEAKI (JP)
FUJITA SOSHI (JP)
IRIKAWA HIDEAKI (JP)
Application Number:
PCT/JP2023/030923
Publication Date:
March 07, 2024
Filing Date:
August 28, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
C23C28/00; B32B9/00; B32B15/04; C21D1/18; C21D9/00; C22C21/02; C22C38/00; C22C38/14; C22C38/58; C23C26/00
Domestic Patent References:
| WO2019194308A1 | 2019-10-10 | |||
| WO2021106178A1 | 2021-06-03 | |||
| WO2022215228A1 | 2022-10-13 |
Foreign References:
| JP2011149084A | 2011-08-04 | |||
| KR20190062944A | 2019-06-07 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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