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

Claim 0:
1. A method of making an aluminum alloy product, comprising:
casting a 6xxx series aluminum alloy;
heating the cast aluminum alloy to a temperature of 510° C. to 580° C.;
maintaining the cast aluminum alloy at the temperature of 510° C. to 580° C. for at least 0.5 hours to form a heated cast aluminum alloy;
hot rolling the heated cast aluminum alloy into a hot rolled aluminum alloy product, the hot rolled aluminum alloy product having a thickness up to 12 mm at a hot roll exit temperature of 250° C. to 400° C.;
cold rolling the hot rolled aluminum alloy product to form a cold rolled aluminum alloy product at a first gauge;
heat treating the cold rolled aluminum alloy product at a first gauge at a temperature of 520° C. to 590° C. to form a heat treated aluminum alloy product;
quenching the heat treated aluminum alloy product to ambient temperature to form a quenched aluminum alloy product;
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; and
cold rolling the under-aged aluminum alloy product to form a cold rolled aluminum alloy product at a second gauge; and
re-aging the cold rolled aluminum alloy product at a second gauge at a temperature from 50° C. to 130° C. for a time of up to 72 hours.