Thin strips or foils of alfesi alloy
OwnerArmelle Danielou, Jean-Marie Feppon +1inventors
InventorsArmelle Danielou, Jean-Marie Feppon, Bruno Chenal
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Abstract
The invention relates to a thin strip or foil, having a thickness of 6 to 200 ?m, preferably, of 6 to 50 ?m, and composed of an alloy containing (in weight %) Si: 1.0 to 1.5, Fe: 1.0 to 1.5, Cu <0.2, Mn <0.1, other elements <0.05 each up to a total <0.15, the remainder being Al. The annealed thin strip or foil has a tensile strength Rm >110 MPa for a thickness >9 ?m and >100 MPa for a thickness of 6 to 9 ?m, and an elastic limit R0.2 >70 MPa. Preferably, said alloy has a silicon content of 1.1 to 1.3% and an iron content of 1.0 to 1.2%. The aforementioned thin strips or foils may be used especially for the production of multilayer composites, overcaps for bottles or aluminium wrappings.
Claims10
Thin strip or foil between 6 μm and 200 μm thick, and preferably between 6 μm and 50 μm thick, of an alloy with the following composition (% by weight):
- Si:
- 1.0-1.5;
- Fe:
- 1.0-1.5;
- Cu <0.2;
- Mn <0.1;
- other elements <0.05 each and <0.15 total, remainder Al, with an ultimate tensile strength Rm in the annealed temper >110 MPa for thicknesses >9 μm and >100 MPa for thicknesses between 6 μm and 9 μm.
Manufacturing process for thin strips thinner than 200 μm made of an Al—Fe—Si alloy with composition (% by weight):
- Si:
- 1.0-1.5;
- Fe:
- 1.0-1.5;
- Cu <0.2;
- Mn <0.1;
- other elements <0.05 each and <0.15 total, remainder Al,
- including the preparation of a first strip either by vertical semi-continuous casting of a plate and hot rolling, or by continuous casting possibly followed by hot rolling, cold rolling of this first strip down to the final thickness, possibly with intermediate annealing at a temperature between 250° C. and 350° C., and preferably between 280° C. and 340° C., and final annealing at a temperature between 200° C. and 370° C.
Dependencies are inferred from the claim text.