Back to results
US 9,314,826 B2Granted
Method for the manufacture of an aluminium alloy plate product having low levels of residual stress
AssigneeAleris Rolled Products Germany GmbH
InventorsIngo Günther Kröpfl, Alfred Johann Peter Haszler
Life of this patent
Estimating the term…
Abstract
This relates to a method of the manufacture of a thick gauge aluminum alloy plate having reduced level of residual stress. The method includes (a) providing a solution heat-treated and quenched aluminum alloy plate having a thickness of at least 80 mm, (b) stress-relieving the plate by cold rolling the plate to achieve a reduction in the thickness direction of the plate product in a range of at most 8%.
Claims19
A method of the manufacture of an aluminium ahoy plate having reduced level of residual stress, said method comprising:
- a) providing a solution heat-treated, quenched, artificially aged and cooled aluminium alloy plate having a thickness of at least 80 mm,
- b) stress-relieving said plate by cold rolling the plate to achieve a reduction in the thickness direction of the plate product in a range of 0.5% to 6%, wherein the cold rolling is carried out after the solution heat treatment, quenching, artificial ageing and cooling and wherein the cold rolling is carried out at a strain rate of 0.006 to 0.10 sec−1.
Dependencies are inferred from the claim text.