HOT-DIP AL-ZN-MG-SI-SR COATED STEEL SHEET AND METHOD OF PRODUCING SAME

Provided is a hot-dip Al-Zn-Mg-Si-Sr coated steel sheet having good surface appearance as well as excellent corrosion resistance in worked parts, which has a hot-dip coating layer having a composition containing 25 mass% to 70 mass% of Al, 0.6 mass% to 5 mass% of Si, 0.1 mass% to 10 mass% of Mg, and...

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Bibliographische Detailangaben
Hauptverfasser:	OOI TOSHIHIKO, KANNO FUMITAKA, MIYAKE HIDENORI, TOBIYAMA YOICHI, IWANO SUMIHISA
Format:	Patent
Sprache:	eng
Schlagworte:	ALLOYS CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL FERROUS OR NON-FERROUS ALLOYS INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:	Provided is a hot-dip Al-Zn-Mg-Si-Sr coated steel sheet having good surface appearance as well as excellent corrosion resistance in worked parts, which has a hot-dip coating layer having a composition containing 25 mass% to 70 mass% of Al, 0.6 mass% to 5 mass% of Si, 0.1 mass% to 10 mass% of Mg, and 0.001 mass% to 1.0 mass% of Sr, with the balance being Zn and inevitable impurities, where the hot-dip coating layer includes an interfacial alloy layer present at an interface with a base steel sheet, and a main layer present on the alloy layer, and an Al-Si-Sr alloy having an average major axis of 1 ?m or less is present between the main layer and the interfacial alloy layer. (Figure 1)