HOT-PRESSED MEMBER, STEEL SHEET FOR HOT-PRESSING, AND METHODS FOR PRODUCING SAME

Title:

HOT-PRESSED MEMBER, STEEL SHEET FOR HOT-PRESSING, AND METHODS FOR PRODUCING SAME

Document Type and Number:

WIPO Patent Application WO/2022/091529

Kind Code:

A1

Abstract:

Provided are a hot-pressed member, a steel sheet for hot-pressing, and methods for producing the hot-pressed member and the steel sheet. A hot-pressed member according to the present invention comprises: a solid solution phase in which Zn is contained on at least one surface of a steel sheet, and the balance of which is Fe and unavoidable impurities; an intermetallic compound phase which contains Fe, and the balance of which is Zn and unavoidable impurities; and a Zn-based alloy plating layer having an oxide layer containing Zn, wherein the oxide layer is located on the outermost surface layer of the Zn-based alloy plating layer, the oxide layer segments the intermetallic compound phase, and a segmented density per unit cross-sectional area in at least one cross section of the oxide layer is at least 10 segmented parts/mm.

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Inventors:

OGAWA SHUHEI (JP)
TANAKA MINORU (JP)
SATO RINTA (JP)
MIZUNO DAISUKE (JP)
NAKAJIMA SEIJI (JP)

Application Number:

PCT/JP2021/030091

Publication Date:

May 05, 2022

Filing Date:

August 18, 2021

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21D22/20; C21D1/18; C21D9/00; C22C18/00; C22C38/00; C22C38/06; C22C38/60; C23C2/06; C23C2/26; C25D5/48

Domestic Patent References:

WO2018179395A1	2018-10-04
WO2015152263A1	2015-10-08
WO2019189067A1	2019-10-03
WO2021019829A1	2021-02-04

Foreign References:

JP2015081368A	2015-04-27
JP2018204065A	2018-12-27
JPH0633213A	1994-02-08
JPH10317121A	1998-12-02
JP2003073774A	2003-03-12

Other References: