Patent ID: 11958266
Assignee: NOVELIS KOBLENZ GMBH
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 16:
17. A method of manufacturing a rolled composite aerospace product according to claim 1, comprising the steps of:
providing an ingot of a 2XXX-series aluminium alloy for forming the core layer of the composite aerospace product;
homogenizing the ingot of the 2XXX-series aluminium alloy at a temperature in the range of 400° C. to 510° C. for at least 2 hours;
providing an ingot or rolled clad liner of an Al—Cu aluminium alloy for forming an outer clad layer on the 2XXX-series core aluminium alloy;
optionally homogenizing or preheating the ingot of the Al—Cu aluminium clad alloy forming an outer clad layer at a temperature in the range of at least 400° C. for at least 0.5 hour;
roll bonding the Al—Cu alloy clad layer to the 2XXX-series core alloy to form a roll bonded product, and optionally followed by cold rolling;
solution heat-treating the roll bonded product at a temperature in the range of 450° C. to 510° C.;
cooling of the solution heat-treated roll bonded product to below 100° C.;
optionally stretching of the solution heat-treated and cooled roll bonded product; and
ageing of the cooled roll bonded product.