Shaped direct chill aluminum ingot
AssigneeTri-Arrows Aluminum Inc.
InventorsGyan Jha, J. David Brown, Shridas Ningileri, Weimin Yin, Randall Bowers
Life of this patent
Estimating the term…
Abstract
Method and apparatus for forming aluminum ingot having shaped ends to avoid alligatoring during rolling.
Claims13
A method of rolling an ingot of aluminum to avoid alligatoring at an end as the ingot is reduced in thickness to produce a slab or sheet, the ingot being rolled in a rolling mill wherein the ingot is subject to multiple rolling passes, the method comprising:
- (a) providing a rolling mill;
- (b) providing an ingot to be rolled, the ingot having two large flat sides to provide an ingot width and at least one shaped end, said shaped end having:
- (i) opposed flat surfaces extending across the ingot width tapered into said ingot towards an ingot end to provide flat tapered surfaces, said tapered surfaces being provided in the direction of rolling, and being in the range of 2° to 20° from the surface to be rolled and extending towards said ingot end, and
- (ii) said shaped end having a curved surface contiguous with said flat tapered surfaces, said curved surfaces extending across the width of ingot and transverse to said rolling direction to provide said shaped end;
- and
- (c) subjecting said ingot to multiple rolling passes in said rolling mill to reduce said ingot in thickness and extend the ingot in length to produce said slab or sheet having a rolled end, said rolled end of said material being free of alligatoring.
A method of rolling an ingot of aluminum to avoid alligatoring as the ingot is reduced in thickness to produce a slab or sheet, the ingot being rolled in a rolling mill wherein the ingot is subject to multiple rolling passes, the method comprising:
- (a) providing a rolling mill;
- (b) providing an ingot to be rolled, the ingot having two large flat sides and at least one shaped end comprising opposed flat surfaces tapered into said ingot towards said end, said flat tapered surfaces provided in the direction of rolling, and being in the range of 2° to 20° from the surface to be rolled and extending towards said end;
- and
- (c) subjecting said ingot to multiple rolling passes in said rolling mill to reduce said ingot in thickness and extend the ingot in length to produce said slab or sheet substantially free of alligatoring.
Dependencies are inferred from the claim text.