Metal-coated steel strip
AssigneeBluescope Steel Limited
InventorQiyang Liu
Life of this patent
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Abstract
A metallic coated steel strip includes a steel strip and a metallic coating on at least one side of the strip. The metallic coating includes an Al—Zn—Mg—Si overlay alloy layer and an intermediate alloy layer between the steel strip and the overlay alloy layer. The intermediate alloy layer has a composition of, by weight, 4.0-12.0% Zn, 6.0-17.0% Si, 20.0-40.0% Fe, 0.02-0.50% Mg, and balance Al and unavoidable impurities.
Claims29
A metallic coated steel strip that includes a steel strip and a metallic coating on at least one side of the strip, with the metallic coating including an Al—Zn—Mg—Si overlay alloy layer and an intermediate alloy layer between the steel strip and the overlay alloy layer, wherein the intermediate alloy layer has a composition of, by weight, 4.0-12.0% Zn, 6.0-17.0% Si, 20.0-40.0% Fe, 0.02-0.50% Mg, and balance Al and unavoidable impurities, and wherein the intermediate alloy layer includes substantially columnar crystals measuring 50-1000 nm in a short diameter as measured on a cross section through the thickness of the coating.
A metallic coated steel strip that includes a steel strip and a metallic coating on at least one side of the strip, with the metallic coating including an Al—Zn—Mg—Si overlay alloy layer and an intermediate alloy layer between the steel strip and the overlay alloy layer, wherein the intermediate alloy layer has a composition of, by weight, 4.0-12.0% Zn, 6.0-17.0% Si, 20.0-40.0% Fe, 0.02-0.50% Mg, and balance Al and unavoidable impurities, and wherein the intermediate alloy layer includes substantially equiaxial crystals measuring 50-4000 nm in a long diameter as measured on a cross section through the thickness of the coating.
Dependencies are inferred from the claim text.