QUASICRYSTAL-CONTAINING PLATED STEEL SHEET AND METHOD FOR PRODUCING QUASICRYSTAL-CONTAINING PLATED STEEL SHEET

Title:

QUASICRYSTAL-CONTAINING PLATED STEEL SHEET AND METHOD FOR PRODUCING QUASICRYSTAL-CONTAINING PLATED STEEL SHEET

Document Type and Number:

WIPO Patent Application WO/2016/035200

Kind Code:

A1

Abstract:

[Problem] To provide: a quasicrystal-containing plated steel sheet which has a good balance between corrosion resistance and chipping resistance; and a method for producing this quasicrystal-containing plated steel sheet. [Solution] A quasicrystal-containing plated steel sheet according to the present invention is provided with: a plating layer that is positioned on at least one surface of a steel sheet; and an alloy layer that is positioned at the interface between the plating layer and the steel sheet and is composed of an Al-Fe intermetallic compound. The plating layer has a chemical composition containing, in atom%, at least 28.5-50% of Zn and 0.3-12% of Al, with the balance made up of Mg and impurities. The plating layer comprises: a first plating layer which is composed of a structure that contains, sequentially from the steel sheet side, an MgZn phase, an Mg phase and a quasicrystal phase; and a second plating layer that is positioned on the first plating layer and contains an Mg51Zn20 phase, a Zn phase and a quasicrystal phase.

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Inventors:

TOKUDA KOHEI (JP)

Application Number:

PCT/JP2014/073494

Publication Date:

March 10, 2016

Filing Date:

September 05, 2014

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C22C23/04; C23C2/04; C22C30/06; C23C2/06; C23C2/28

Domestic Patent References:

WO2008111688A1

2008-09-18

Foreign References:

JP2011190507A

2011-09-29

Other References: