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Welded Joint

Abstract: Provided is a welded joint comprising stacked multiple steel plates, a spot-welded section having a nugget for joining the multiple steel plates together as well as a press-contact portion and a heat-affected zone which are formed around the nugget, and a separation section positioned around the press-contact portion, said welded joint being characterized in that: at least one of the multiple steel plates is a plated steel plate which comprises a base steel plate and a plating layer formed on one of the surfaces of the base steel plate that corresponds at least to an overlapping surface for the multiple steel plates; a plating layer portion in the separation section disposed outside the heat-affected zone has a predetermined chemical composition; and in the plating layer portion in a 500 µm region of the separation section from an end part of the press-contact portion, the ratio of the area ratio of ?-phase to the total area ratio of ?-phase and G-phase is 10 to 100%.

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
04 July 2024
Publication Number
51/2024
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. MITSUNOBU, Takuya
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071
2. TAKEBAYASHI, Hiroshi
c/o NIPPON STEEL CORPORATION, 6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Specification

Documents

Application Documents

# Name Date
1 202417051325-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [04-07-2024(online)].pdf 2024-07-04
2 202417051325-STATEMENT OF UNDERTAKING (FORM 3) [04-07-2024(online)].pdf 2024-07-04
3 202417051325-REQUEST FOR EXAMINATION (FORM-18) [04-07-2024(online)].pdf 2024-07-04
4 202417051325-PROOF OF RIGHT [04-07-2024(online)].pdf 2024-07-04
5 202417051325-PRIORITY DOCUMENTS [04-07-2024(online)].pdf 2024-07-04
6 202417051325-POWER OF AUTHORITY [04-07-2024(online)].pdf 2024-07-04
7 202417051325-NOTIFICATION OF INT. APPLN. NO. & FILING DATE (PCT-RO-105-PCT Pamphlet) [04-07-2024(online)].pdf 2024-07-04
8 202417051325-FORM 18 [04-07-2024(online)].pdf 2024-07-04
9 202417051325-FORM 1 [04-07-2024(online)].pdf 2024-07-04
10 202417051325-DRAWINGS [04-07-2024(online)].pdf 2024-07-04
11 202417051325-DECLARATION OF INVENTORSHIP (FORM 5) [04-07-2024(online)].pdf 2024-07-04
12 202417051325-COMPLETE SPECIFICATION [04-07-2024(online)].pdf 2024-07-04
13 202417051325-FORM 3 [28-10-2024(online)].pdf 2024-10-28