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Hot Stamp Formed Body

Abstract: Provided is a hot-stamped molded article characterized by comprising a steel base material and a plating layer disposed on a surface of the steel base material, wherein: the plating layer has a prescribed chemical composition; the average C concentration from the surface of the steel base material to 1 µm in the depth direction is 0.25 mass% or less; the steel base material contains 90% or more of martensite in terms of area ratio; the adhered amount of the plating layer is 30 g/m2 or more per one surface; the plating layer contains a Zn-containing phase comprising at least one of an ?-Zn phase, Fe-Zn-based intermetallic compound phase, and Mg-Zn-based intermetallic compound phase; and the hot-stamped molded article has a Vickers hardness of 400 HV or more.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
19 June 2025
Publication Number
27/2025
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. MITSUNOBU, Takuya
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. HAYASHIDA, Shota
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
3. TAKEBAYASHI, Hiroshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202517058837-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [19-06-2025(online)].pdf 2025-06-19
2 202517058837-STATEMENT OF UNDERTAKING (FORM 3) [19-06-2025(online)].pdf 2025-06-19
3 202517058837-REQUEST FOR EXAMINATION (FORM-18) [19-06-2025(online)].pdf 2025-06-19
4 202517058837-PROOF OF RIGHT [19-06-2025(online)].pdf 2025-06-19
5 202517058837-PRIORITY DOCUMENTS [19-06-2025(online)].pdf 2025-06-19
6 202517058837-POWER OF AUTHORITY [19-06-2025(online)].pdf 2025-06-19
7 202517058837-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [19-06-2025(online)].pdf 2025-06-19
8 202517058837-FORM 18 [19-06-2025(online)].pdf 2025-06-19
9 202517058837-FORM 1 [19-06-2025(online)].pdf 2025-06-19
10 202517058837-DECLARATION OF INVENTORSHIP (FORM 5) [19-06-2025(online)].pdf 2025-06-19
11 202517058837-COMPLETE SPECIFICATION [19-06-2025(online)].pdf 2025-06-19
12 202517058837-MARKED COPIES OF AMENDEMENTS [23-06-2025(online)].pdf 2025-06-23
13 202517058837-FORM 13 [23-06-2025(online)].pdf 2025-06-23
14 202517058837-AMMENDED DOCUMENTS [23-06-2025(online)].pdf 2025-06-23
15 202517058837-FORM-26 [31-08-2025(online)].pdf 2025-08-31
16 202517058837-FORM 3 [17-10-2025(online)].pdf 2025-10-17