Metal treatment – Process of modifying or maintaining internal physical... – With casting or solidifying from melt
Reexamination Certificate
2005-09-23
2009-11-10
Wyszomierski, George (Department: 1793)
Metal treatment
Process of modifying or maintaining internal physical...
With casting or solidifying from melt
Reexamination Certificate
active
07615125
ABSTRACT:
Process for manufacturing aluminum alloy products, with high toughness and fatigue resistance comprising: (a) preparing an aluminum alloy bath, (b) adding a refining agent containing particles of AlTiC type phases into the bath, (c) casting an as-cast form such as an extrusion ingot, a forging ingot or a rolling ingot, (d) hot transforming the as-cast form, possibly after scalping, to form a blank or a product with final thickness, (e) optionally cold transforming the blank to a final thickness, (f) applying a solution heat treatment and quenching the product output from (d) or (e), followed by relaxation by controlled stretching with permanent elongation between 0.5 and 5%, and optionally annealing, wherein the quantity of refining agent is chosen such that the average casting grain size of the as-cast form is more than 500 μm. The present invention may be used, for example, to manufacture fuselage sheet or light-gauge plates made with 6056 alloy.
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Bes Bernard
Jarry Philippe
Alcan Rhenalu
Baker Donelson Caldwell Bearman & Berkowitz PC
Shevin Mark L
Wyszomierski George
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