7xx aluminum casting alloys, and methods for making the same

US11103919B2 · kind B2 · utility

Assignee

• ALCOA USA CORP. · US

Inventors

• Xinyan Yan · Murrysville, US
• Eider Simielli · Monroeville, US
• Jen C. Lin · Export, US
• Wenping Zhang · Jingwei, CN
• James Daniel Bryant · Murrysville, US

Key dates

• Filing date: Apr 23, 2015
• Grant date: Aug 31, 2021
• Expiry date: Jul 10, 2036

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22F1/053
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

New 7xx aluminum casting alloys are disclosed. The aluminum casting alloys generally include from 3.0 to 8.0 wt. % Zn, from 1.0 to 3.0 wt. % Mg, where the wt. % Zn exceeds the wt. % Mg, from 0.35 to 1.0 wt. % Cu, where the wt. % Mg exceeds the wt. % Cu, from 0.05 to 0.30 wt. % V, from 0.01 to 1.0 wt. % of at least one secondary element (Mn, Cr, Zr, Ti, B, and combinations thereof), up to 0.50 wt. % Fe, and up to 0.25 wt. % Si, the balance being aluminum and other elements, wherein the aluminum casting alloy include not greater than 0.05 wt. % each of the other elements, and wherein the aluminum casting alloy includes not greater than 0.15 wt. % in total of the other elements.