Patent ID: 11932928
Assignee: NOVELIS INC.
Field: Materials, metallurgy (Chemistry)
Classification: CPC C | IPC C

Claim 4:
5. A method of making an aluminum alloy product, comprising:
casting a 6xxx series aluminum alloy;
heating the cast aluminum alloy to a temperature of 400° C. to 600° C.;
maintaining the cast aluminum alloy at the temperature of 400° C. to 600° C. for 0.5 to 100 hours to form a heated aluminum alloy;
hot rolling the cast aluminum alloy into a hot rolled aluminum alloy product and quenching to form a quenched aluminum alloy product, the quenched aluminum alloy product having a thickness up to 12 mm at a quenching exit temperature of 30° C. to 400° C.;
under-ageing the quenched aluminum alloy product by under-ageing at a temperature from 155° C. to 200° C. for a time from 1 to 36 hours to form an under-aged aluminum alloy product;
cold rolling the under aged aluminum alloy product to form a cold rolled aluminum alloy product; and
re-aging the cold rolled aluminum alloy product at a temperature from 50° C. to 130° C. for a time of up to 72 hours.