Hot Stamp Molded Object

Abstract: This hot-stamp-molded object has a predetermined chemical composition and has a metal structure including, in area percentage, 90-100% of martensite and 0-10% of remaining structures. Of all martensites, the proportion of martensites, having a GAIQ value of 40000 or less, is less than 5.0%. The average particle size of prior austenite grains is 6.0 µm or less. The standard deviation of the particle sizes of the prior austenite grains is 2.6 µm or less.

Patent Information

Application #

Filing Date

07 December 2023

Publication Number

39/2024

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. FUJINAKA Shingo

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

2. NISHIBATA Hitomi

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

Specification

Documents

Application Documents

#	Name	Date
1	202317083472-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [07-12-2023(online)].pdf	2023-12-07
2	202317083472-STATEMENT OF UNDERTAKING (FORM 3) [07-12-2023(online)].pdf	2023-12-07
3	202317083472-PROOF OF RIGHT [07-12-2023(online)].pdf	2023-12-07
4	202317083472-PRIORITY DOCUMENTS [07-12-2023(online)].pdf	2023-12-07
5	202317083472-POWER OF AUTHORITY [07-12-2023(online)].pdf	2023-12-07
6	202317083472-FORM 1 [07-12-2023(online)].pdf	2023-12-07
7	202317083472-DRAWINGS [07-12-2023(online)].pdf	2023-12-07
8	202317083472-DECLARATION OF INVENTORSHIP (FORM 5) [07-12-2023(online)].pdf	2023-12-07
9	202317083472-COMPLETE SPECIFICATION [07-12-2023(online)].pdf	2023-12-07
10	202317083472-FORM 3 [30-04-2024(online)].pdf	2024-04-30
11	202317083472-FORM 18 [29-09-2025(online)].pdf	2025-09-29