Steel Sheet For Hot Stamping And Hot Stamped Member

Abstract: This steel sheet for hot stamping has, on the entirety of at least one surface of the steel sheet, a surface treatment coating film demonstrating an emissivity of 60% or more at a wavelength of 8.0 µm at 25°C. The surface treatment coating film contains carbon black and at least one oxide selected from the group consisting of Zr oxide, Zn oxide and Ti oxide. The carbon black and the oxide are dispersed throughout the entirety of the surface treatment coating film. The surface treatment coating film has a silica content of 0-0.3 g/m2. When the adhesion amounts of the carbon black and the oxide are XCB (g/m2) and XOxide (g/m2), respectively, the following formulas are satisfied. 118.9?24280/{6700/(100+76×XCB)+18000/(130+65×XOxide)}?332.0

Patent Information

Application #

Filing Date

04 August 2023

Publication Number

35/2024

Publication Type

INA

Invention Field

METALLURGY

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. SUZUKI, Yuki

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

2. UENISHI, Kenta

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

3. FUJITA, Soshi

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

4. FUDA, Masahiro

c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

#	Name	Date
1	202317052427-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [04-08-2023(online)].pdf	2023-08-04
2	202317052427-STATEMENT OF UNDERTAKING (FORM 3) [04-08-2023(online)].pdf	2023-08-04
3	202317052427-POWER OF AUTHORITY [04-08-2023(online)].pdf	2023-08-04
4	202317052427-FORM 1 [04-08-2023(online)].pdf	2023-08-04
5	202317052427-DECLARATION OF INVENTORSHIP (FORM 5) [04-08-2023(online)].pdf	2023-08-04
6	202317052427-COMPLETE SPECIFICATION [04-08-2023(online)].pdf	2023-08-04
7	202317052427-Proof of Right [18-10-2023(online)].pdf	2023-10-18
8	202317052427-FORM 3 [22-01-2024(online)].pdf	2024-01-22
9	202317052427-FORM 18 [07-03-2025(online)].pdf	2025-03-07