Title:
LAYERED BLANK FOR HOT STAMPING AND LAYERED HOT STAMP MOLDED BODY
Document Type and Number:
WIPO Patent Application WO/2023/224122
Kind Code:
A1
Abstract:
[Problem] The present invention addresses the problem of ameliorating both low heating rate of a layered part and heating rate difference between the layered part and a single sheet part in cases where an Al plated steel sheet is used as a base material. [Solution] A layered blank for hot stamping according to the present invention is provided with: a first Al plated steel sheet which has a sheet thickness t1; and a second Al plated steel sheet which has a sheet thickness t2, and is superposed on and welded to the first Al plated steel sheet, while having a smaller area than the first Al plated steel sheet and having a carbon-based black coating film as an upper layer of an Al plating layer on a side that does not come into contact with the first Al plated steel sheet. This layered blank for hot stamping satisfies formula (1) to formula (5).
Inventors:
FUJITA SOSHI (JP)
SUZUKI YUKI (JP)
MAKI JUN (JP)
IRIKAWA HIDEAKI (JP)
SUZUKI YUKI (JP)
MAKI JUN (JP)
IRIKAWA HIDEAKI (JP)
Application Number:
PCT/JP2023/018802
Publication Date:
November 23, 2023
Filing Date:
May 19, 2023
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21D22/20; C21D1/18; C21D1/70; C21D9/00; C21D9/50; C22C38/00; C22C38/60; C23C2/12; C23C2/26; C23C26/00
Domestic Patent References:
| WO2019194308A1 | 2019-10-10 | |||
| WO2010005121A1 | 2010-01-14 |
Foreign References:
| JP2011149084A | 2011-08-04 | |||
| KR20210079719A | 2021-06-30 | |||
| JP2021524885A | 2021-09-16 |
Attorney, Agent or Firm:
HAGIWARA, Yasushi et al. (JP)
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