Patent ID: 11879167
Assignee: NOVELIS KOBLENZ GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 14:
15. A method of manufacturing a rolled composite aerospace product according to claim 1, comprising the steps of:
(a) providing an ingot of a 2XXX-series aluminium alloy for forming the core layer of the composite aerospace product;
(b) homogenizing the ingot of the 2XXX-series aluminium alloy at a temperature in the range of 400° C. to 505° C. for at least 2 hours;
(c) providing an ingot or rolled clad liner of a 6XXX-series aluminium alloy for forming an outer clad layer on the 2XXX-series core aluminium alloy;
(d) homogenizing the ingot of the 6XXX-series aluminium alloy at a temperature in the range of at least 480° C., for at least 0.5 hour;
(e) roll bonding the 6XXX-series aluminium alloy to the 2XXX-series core alloy to form a roll bonded product, and optionally followed by cold rolling;
(f) solution heat-treating the roll bonded product at a temperature in the range of 450° C. to 505° C.;
(g) cooling of the solution heat-treated roll bonded product to below 100° C.;
(h) optionally stretching of the solution heat-treated and cooled roll bonded product; and
(i) ageing of the 2XXX-series core alloy of the cooled roll bonded product.