Heat treatment of age-hardenable aluminum alloys

Details Heat treatment of age-hardenable aluminum alloys Heat treatment of age-hardenable aluminum alloys

2006-04-11

2006-04-11

Wyszomierski, George (Department: 1742)

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

C148S690000, C148S693000, C148S694000, C148S697000

Reexamination Certificate

active

07025839

ABSTRACT:
The heat treatment of an age-hardenable aluminium alloy, having alloying elements in solid solution includes the stages of holding the alloy for a relatively short time at an elevated temperature TAappropriate for ageing the alloy; cooling the alloy from the temperature TAat a sufficiently rapid rate and to a lower temperature so that primary precipitation of solute elements is substantially arrested; holding the alloy at a temperature TBfor a time sufficient to achieve a suitable level of secondary nucleation or continuing precipitation of solute elements; and heating the alloy to a temperature which is at, sufficiently close to, or higher than temperature TAand holding for a further sufficient period of time at temperature TCfor achieving substantially maximum strength.

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