Lap Welded Joint, Automobile Skeleton Member, And Method For

Lap Welded Joint, Automobile Skeleton Member, And Method For Manufacturing Lap Welded Joint

Abstract: This lap welded joint comprises a plurality of steel plates that are partially or entirely overlapped, a spot welded portion joining the overlapped parts of two or more of the steel plates, and an arc welded portion disposed so as to temper a nugget of the spot welded portion, wherein: at least one of the spot welded steel plates is a high-strength steel plate having a tensile strength of at least 780 MPa; a part in which a measured value of a hardness of the nugget of the spot welded portion is smallest is located between a center of the nugget and the arc welded portion; and a difference between a minimum value of the measured value of the hardness of the nugget and a maximum value of the measured value of the hardness of the nugget is at least equal to 25 HV.

Patent Information

Application #

Filing Date

23 July 2024

Publication Number

51/2024

Publication Type

INA

Invention Field

MECHANICAL ENGINEERING

Status

Email

Parent Application

Applicants

NIPPON STEEL CORPORATION

6-1, Marunouchi 2-chome, Chiyoda-ku, Tokyo 1008071

Inventors

1. FUJIMOTO Hiroki

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

2. TAMEZANE Takumi

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

3. ASHIDA Hajime

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

Specification

Documents

Application Documents

#	Name	Date
1	202417056036-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [23-07-2024(online)].pdf	2024-07-23
2	202417056036-STATEMENT OF UNDERTAKING (FORM 3) [23-07-2024(online)].pdf	2024-07-23
3	202417056036-REQUEST FOR EXAMINATION (FORM-18) [23-07-2024(online)].pdf	2024-07-23
4	202417056036-PROOF OF RIGHT [23-07-2024(online)].pdf	2024-07-23
5	202417056036-PRIORITY DOCUMENTS [23-07-2024(online)].pdf	2024-07-23
6	202417056036-POWER OF AUTHORITY [23-07-2024(online)].pdf	2024-07-23
7	202417056036-FORM 18 [23-07-2024(online)].pdf	2024-07-23
8	202417056036-FORM 1 [23-07-2024(online)].pdf	2024-07-23
9	202417056036-DRAWINGS [23-07-2024(online)].pdf	2024-07-23
10	202417056036-DECLARATION OF INVENTORSHIP (FORM 5) [23-07-2024(online)].pdf	2024-07-23
11	202417056036-COMPLETE SPECIFICATION [23-07-2024(online)].pdf	2024-07-23
12	202417056036-FORM 3 [10-12-2024(online)].pdf	2024-12-10