High strength aluminum casting alloy

a casting alloy, high-tensile technology, applied in the field of aluminum casting alloys, can solve the problems of difficult casting of high-tensile 7xxx series alloys, and achieve the effects of improving mechanical properties, high strength, and improving mechanical properties
US20120087826A1Inactive Publication Date: 2012-04-12RAO UES
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
RAO UES
Publication Date
2012-04-12
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention discloses a high strength Al—Zn—Mg—Cu (7000 series) alloy that can be cast, the cast alloy having a tensile strength of at least 500 megapascals (MPa) and 4% elongation. The cast alloy composition can include about 5.5-9.0 weight percent (wt. %) of zinc, 2.0-3.5 wt. % of magnesium, 0.1-0.5 wt. % scandium, 0.05-0.20 wt. % zirconium, 0.5-3.0 wt. % copper, 0.10-0.45 wt. % manganese, 0.01-0.35 wt. % iron, 0.01-0.20 wt. % silicon with a balance of aluminum and possible casting impurities. The alloy also has good fluidity comparable to high silicon cast aluminum alloys and components can be manufactured using direct chill casting, sand casting, and / or sand casting under high pressure.
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Description

RELATED APPLICATION

[0001] This application claims priority to U.S. Provisional Patent Application No. 61 / 392,310 filed on Oct. 12, 2010, having the same title and which is incorporated herein in its entirety by reference.FIELD OF THE INVENTION

[0002] The present invention is related to an aluminum alloy, and in particular, to an aluminum casting alloy that exhibits high strength and adequate ductility.BACKGROUND OF THE INVENTION

[0003] The use of aluminum alloys for lightweight components when compared to steel is known. For example, aluminum alloys are used extensively in the automotive and aircraft industry. In addition, with a face centered cubic structure, aluminum alloys have also found use in cryogenic type environments. For example, U.S. Pat. No. 7,060,139 filed on Nov. 8, 2002, titled “High Strength Aluminum Alloy Composition”, provides a high strength 7XXX series alloy that can be used at cryogenic temperatures and afford a tensile strength of at least 790 megapascals (MPa) with...

Claims

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