WELDED JOINT

WIPO Patent Application WO/2023/132244

A1

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 η-phase to the total area ratio of η-phase and Γ-phase is 10 to 100%.

JPS53134725	PRODUCTION OF STEEL PLATE WITH REMARKABLY EXCELLENT TOUGHNESS UNDER LOW TEMPERATURE
WO/2013/103125	HOT-ROLLED STEEL SHEET AND METHOD FOR PRODUCING SAME
JPH0694573	[Title of the Invention] A method for producing a ferrite-based stainless steel sheet having excellent surface properties and press moldability.

MITSUNOBU TAKUYA (JP)
TAKEBAYASHI HIROSHI (JP)

PCT/JP2022/047151

July 13, 2023

December 21, 2022

Click for automatic bibliography generation  

NIPPON STEEL CORP (JP)

C21D8/02; B23K11/11; B23K11/16; C21D9/46; C22C18/00; C22C18/04; C22C38/00; C22C38/60; C23C2/06; C23C2/26

JP2017510702A	2017-04-13
JP2010043296A	2010-02-25
JP2010222674A	2010-10-07
JP2000119832A	2000-04-25
JP2005248236A	2005-09-15

AOKI, Atsushi et al. (JP)

View/Download PDF      PDF Help

Previous Patent: UNINTERRUPTIBLE POWER SUPPLY DEVICE

Next Patent: FILM FORMING METHOD AND FILM FORMING APPARATUS