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Steel Sheet For Hot Stamping And Hot Stamped Member

Abstract: This steel sheet for hot stamping has, on a surface thereof: a portion that has a surface treatment coating film demonstrating an emissivity of 60% or more at a wavelength of 8.0 µm at 25°C; and a portion that does not have the surface treatment coating film. 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

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
01 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 202317051727-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [01-08-2023(online)].pdf 2023-08-01
2 202317051727-STATEMENT OF UNDERTAKING (FORM 3) [01-08-2023(online)].pdf 2023-08-01
3 202317051727-POWER OF AUTHORITY [01-08-2023(online)].pdf 2023-08-01
4 202317051727-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [01-08-2023(online)].pdf 2023-08-01
5 202317051727-FORM 1 [01-08-2023(online)].pdf 2023-08-01
6 202317051727-DRAWINGS [01-08-2023(online)].pdf 2023-08-01
7 202317051727-DECLARATION OF INVENTORSHIP (FORM 5) [01-08-2023(online)].pdf 2023-08-01
8 202317051727-COMPLETE SPECIFICATION [01-08-2023(online)].pdf 2023-08-01
9 202317051727-Proof of Right [12-09-2023(online)].pdf 2023-09-12
10 202317051727-FORM 3 [21-12-2023(online)].pdf 2023-12-21
11 202317051727-FORM 18 [10-03-2025(online)].pdf 2025-03-10