Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
HIGH-STRENGTH Zn-Al-Mg-BASED SURFACE-COATED STEEL SHEET AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2018/220873
Kind Code:
A1
Abstract:
[Problem] To provide a high-strength hot dip Zn-Al-Mg-based plated steel sheet in which the in-steel concentration of hydrogen entering the steel in a plating line is remarkably lowered, and which exhibits the inherent excellent corrosion resistance of a Zn-Al-Mg-based plated layer. [Solution] A high strength surface-coated steel sheet comprising a Zn-Al-Mg-based coating layer disposed on the surface of a substrate steel sheet containing, in terms of % by mass, 0.01%-0.20% of C, 0.01%-0.50% of Si, 0.10%-2.50% of Mn, 0.005%-0.050% of P, 0.0005%-0.010% of B, 0.01%-0.20% of Ti, 0%-0.10% of Nb, 0%-0.50% of Mo, 0%-0.50% of Cr, 0.01%-0.10% of Al, and the balance Fe and inevitable impurities, wherein the diffusible hydrogen concentration in the substrate steel sheet is 0.30 ppm or less, and the time until rust is generated in a salt spray test is 7000 hours or longer.

Inventors:
FUJIWARA SUSUMU (JP)
UESUGI SHINYA (JP)
SHIGETOMI TOMOHARU (JP)
Application Number:
PCT/JP2017/031654
Publication Date:
December 06, 2018
Filing Date:
September 01, 2017
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
NISSHIN STEEL CO LTD (JP)
International Classes:
C23C2/06; C22C18/00; C22C18/04; C22C38/00; C22C38/38; C23C2/02; C23C2/26; C23C2/28
Domestic Patent References:
WO2013133270A12013-09-12
WO2007052683A12007-05-10
Foreign References:
JP2013142198A2013-07-22
JP2008279071A2008-11-20
JP2013241665A2013-12-05
JPH10317121A1998-12-02
JPH07150241A1995-06-13
JP2012172247A2012-09-10
JP5097305B12012-12-12
Other References:
YASUHIDE MORIMOTO ET AL.: "Kenzaimuke Kotaishokusei Yoyu Zn-Al-Mg-Si Gokin Mekki Koban "Superdyma"", NIPPON STEEL TECHNICAL REPORT, vol. 377, no. 377, 2002, pages 22 - 24, XP009517586, ISSN: 0300-306X
KOBE STEEL ENGINEERING REPORTS, vol. 50, no. 1, pages 65
See also references of EP 3633062A4
Attorney, Agent or Firm:
KOMATSU Takashi (JP)
Download PDF: