HIGH STRENGTH ALLOYED ELECTROLYTIC ZINC-PLATED STEEL SHEET AND METHOD FOR PRODUCING SAME

WIPO Patent Application WO/2019/142559

A1

Provided are: a high strength alloyed electrolytic zinc-plated steel sheet which has a TS of 780 MPa or more, excellent formability and excellent delayed fracture resistance, while having excellent surface appearance and excellent plating adhesion; and a method for producing this high strength alloyed electrolytic zinc-plated steel sheet. A high strength alloyed electrolytic zinc-plated steel sheet which has a component composition that contains, in mass%, from 0.030% to 0.250% (inclusive) of C, from 0.01% to 3.00% (inclusive) of Si, from 1.00% to 10.00% (inclusive) of Mn, from 0.001% to 0.100% (inclusive) of P and from 0.0001% to 0.0200% (inclusive) of S, with the balance made up of Fe and unavoidable impurities, and which has an alloyed electrolytic zinc plating layer on the surface. This high strength alloyed electrolytic zinc-plated steel sheet is configured such that: the Fe content in the zinc plating layer is 8.0-15.0%; the tensile strength thereof is 780 MPa or more; and the amount of diffusible hydrogen in the steel sheet is 0.2 wt. ppm or less.

WO/2015/090608	SHEET STEEL PRODUCT, A STEEL COMPONENT PRODUCED FROM SUCH A SHEET STEEL PRODUCT, AND BODY FOR A MOTOR VEHICLE
JP5776959	Mold steel with excellent hot workability

AOYAMA MAI (JP)
TSUCHIMOTO KAZUAKI (JP)
FUSHIWAKI YUSUKE (JP)

PCT/JP2018/045856

July 25, 2019

December 13, 2018

Click for automatic bibliography generation  

JFE STEEL CORP (JP)

C22C38/00; C21D9/46; C22C38/04; C22C38/60; C25D5/26; C25D5/50

WO2014132637A1	2014-09-04
WO2014199923A1	2014-12-18

JPH0633213A	1994-02-08
JPS609895A	1985-01-18
JP2015089946A	2015-05-11
JP2009035793A	2009-02-19
JP2016130358A	2016-07-21
JP2001262271A	2001-09-26

See also references of EP 3741878A4

KUMASAKA Akira et al. (JP)

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