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Hot Stamping Formed Body, Steel Sheet, And Manufacturing Methods Of The Same

Abstract: This hot stamp molded body has a chemical composition of 0.40-1.00 mass% of C, 0.01-1.00 mass% of Si, 0.01-1.00 mass% (exclusive of 1.00 mass%) of Mn, at most 0.100 mass% of P, at most 0.01000 mass% of S, and 0.0010-1.0000 mass% of Al, wherein when the position at 1/4 of the thickness from the surface in the thickness direction is defined as a 1/4 depth position, the number density of e-carbides having a circle-equivalent diameter of at least 5 nm at the 1/4 depth position is at least 20 carbides/µm2, and has a tensile strength of at least 2,100 MPa.

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Patent Information

Application #
Filing Date
09 July 2025
Publication Number
36/2025
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. SAWADA Masayoshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. AZUMA Masafumi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
3. YABU Shohei
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
4. MORII Tatsuya
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202517065515-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [09-07-2025(online)].pdf 2025-07-09
2 202517065515-STATEMENT OF UNDERTAKING (FORM 3) [09-07-2025(online)].pdf 2025-07-09
3 202517065515-REQUEST FOR EXAMINATION (FORM-18) [09-07-2025(online)].pdf 2025-07-09
4 202517065515-PROOF OF RIGHT [09-07-2025(online)].pdf 2025-07-09
5 202517065515-PRIORITY DOCUMENTS [09-07-2025(online)].pdf 2025-07-09
6 202517065515-POWER OF AUTHORITY [09-07-2025(online)].pdf 2025-07-09
7 202517065515-FORM 18 [09-07-2025(online)].pdf 2025-07-09
8 202517065515-FORM 1 [09-07-2025(online)].pdf 2025-07-09
9 202517065515-DECLARATION OF INVENTORSHIP (FORM 5) [09-07-2025(online)].pdf 2025-07-09
10 202517065515-COMPLETE SPECIFICATION [09-07-2025(online)].pdf 2025-07-09