ZINC PLATED STEEL SHEET, ELECTRODEPOSITION COATED STEEL SHEET, AUTOMOTIVE PARTS, PRODUCTION METHOD FOR ELECTRODEPOSITION COATED STEEL SHEET, AND PRODUCTION METHOD FOR ZINC PLATED STEEL SHEET

WIPO Patent Application WO/2022/097735

A1

Provided is a zinc plated steel sheet that has excellent weld crack resistance in a welded area even when a high proportion of crystal orientations are unified between an Fe electroplating layer and a cold-rolled steel sheet at an interface between the Fe electroplating layer and the cold-rolled steel sheet.　This zinc plated steel sheet comprises: a Si-containing cold-rolled steel sheet containing 0.1-3.0 mass% of Si; an Fe electroplating layer formed on at least one surface of the Si-containing cold-rolled steel sheet at an adhesion amount of more than 20.0 g/m2 per surface; and a zinc plating layer formed on the Fe electroplating layer. The proportion of crystal orientations that are the same between the Fe electroplating layer and the Si-containing cold-rolled steel sheet at an interface between the Fe electroplating layer and the Si-containing cold-rolled steel sheet is more than 50%.

YAMAMOTO SHUNSUKE (JP)
TAKASHIMA KATSUTOSHI (JP)
AOYAMA MAI (JP)
OKUMURA YUSUKE (JP)
KANAZAWA TOMOMI (JP)
HOSHINO KATSUYA (JP)
MATSUDA HIROSHI (JP)
OKUMURA EI (JP)
MAKIMIZU YOICHI (JP)
KOBA MASAKI (JP)

PCT/JP2021/040872

May 12, 2022

November 05, 2021

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JFE STEEL CORP (JP)

C25D5/26; B23K11/00; B23K11/11; B23K11/16; C22C38/00; C22C38/02; C22C38/60; C23C2/02

WO2020148944A1	2020-07-23
WO2021200412A1	2021-10-07

JP2015500925A	2015-01-08
JPH05132747A	1993-05-28
JPS5881991A	1983-05-17
JP6388099B1	2018-09-12

See also references of EP 4242358A1

SUGIMURA Kenji (JP)

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