Back to results
US 11,692,255 B2Granted
High strength 7XXX series aluminum alloys and methods of making the same
AssigneeNovelis Inc.
InventorsMilan Felberbaum, Sazol Kumar Das, Duane E. Bendzinski, Rajeev G. Kamat, Tudor Piroteala, Rajasekhar Talla
Life of this patent
Estimating the term…
Abstract
Described herein are 7xxx series aluminum alloys with unexpected properties and novel methods of producing such aluminum alloys. The aluminum alloys exhibit high strength and are highly formable. The alloys are produced by continuous casting and can be hot rolled to a final gauge and/or a final temper. The alloys can be used in automotive, transportation, industrial, and electronics applications, just to name a few.
Claims14
A method of producing an aluminum alloy product, comprising:
- continuously casting an aluminum alloy to form a slab, wherein the aluminum alloy comprises 0.03-1.2 wt. % Si, 0.0-1.5 wt. % Fe, 1.0-3.0 wt. % Cu, 0.005-0.9 wt. % Mn, 0.7-8.7 wt. % Mg, 0-0.3 wt. % Cr, 1.7-18.3 wt. % Zn, 0.005-0.6 wt. % Ti, 0-0.4 wt. % Zr, up to 0.15 wt. % of impurities, and Al;
- cooling the slab at a rate from 1° C./s to 200° C./s upon exit from a continuous caster that continuously casts the slab;
- heating the slab to a temperature of no more than 500° C. at a heating rate of from 100° C./min to 10° C./min;
- soaking the heated slab at the temperature for a soak time of 10 seconds to 36 hours;
- and
- hot rolling the slab to a final gauge without cold rolling the slab prior to the final gauge,
- wherein the aluminum alloy product has a yield strength of 400 to 650 MPa at peak age condition.
4 more elements
A method of producing an aluminum alloy, comprising:
- continuously casting an aluminum alloy to form a slab, wherein the aluminum alloy comprises 0.03-1.2 wt. % Si, 0.06-1.5 wt. % Fe, 1.0-3.0 wt. % Cu, 0.005-0.9 wt. % Mn, 0.7-8.7 wt. % Mg, 0-0.3 wt. % Cr, 1.7-8.3 wt. % Zn, 0.005-0.6 wt. % Ti, 0-0.4 wt. % Zr, up to 0.15 wt. % of impurities at up to 0.05 wt. % for each impurity, and
- Al;
- cooling the slab at a rate from 1° C./s to 200° C./s upon exit from a continuous caster that continuously casts the slab;
- heating the slab to a temperature of no more than 500° C. at a heating rate of from 100° C./min to 10° C./min;
- and
- hot rolling the slab to a final gauge and a final temper;
- wherein the aluminum alloy product has a yield strength of 400 to 6501VIPa at peak age condition.
4 more elements
Dependencies are inferred from the claim text.