I've started playing around with brazing pieces of extruded aluminium sections to join them together for strong joins as an alternative to bolting them.
The pieces are made of 6082-T6 aluminium alloy. I've found that the heating needed to braze softens the aluminium enormously, to the point where 3mm thick sections can be effortlessly deformed with pliers.
I've done a lot of searching and I need to either naturally or artificially age-harden it (precipitation hardening). But how long it takes to naturally harden, or the precise process needed to artificially harden it (temperature & time) escapes me. Also, quenching might help, but I haven't found any definitive answers.
How can I re-harden the alloy?