"How Stuff Works" With Dart

[Trmnatr]

I saw "How Stuff Works" and saw where Jack did alot of talking

Wow, I have talked to you on the phone and you talked as calm as you do on the phone EXCEPT you were on TV - Great Job Jack :cool:

Good episode, im still watching it as there is nothing on to watch at 8pm on Thursdays !

Dart Vader,,,,,
Can you give us some more info on the heat treat of the blocks as Jack was talking about and they showed a block being heated ? Do you quench it with anything or allow air to cool it ?

Also, aluminum i have always been told is notch sensative soooo do you polish the blocks or coat them so the tooling marks dont become stress risers on these new billet blocks ?

Bottom line, If i was being on TV i would have been all messed up. Jack you were as calm as can be !!!!!!

[Dart Vader]

Our aluminum is T61 heat treated, which employs a solution heat treat, followed by an artificial aging process.

For those unfamiliar with heat treatment terminology here are some definitions.

Solution Heat Treatment:
A treatment in which an alloy is heated to a suitable temperature and held at this temperature for a sufficient length of time to allow a desired constituent to enter into solid solution, followed by rapid cooling to hold the constituent in solution. The material is then in a supersaturated, unstable state, and may subsequently exhibit Age Hardening.

Aging:
A time-temperature-dependent change in the properties of certain alloys.

I haven't been completely brought up to speed on the process since we changed over from using T6 to T61, but I believe the cooling is done with a quench tank.

Our Billet blocks are machined dead soft, then heat treated, and then finish machined.

On a side note -
Jack is now a living legend here at Dart. Ever since being on TV he even has people to fetch his coffee for him.

[Trmnatr]

Our aluminum is T61 heat treated, which employs a solution heat treat, followed by an artificial aging process.

For those unfamiliar with heat treatment terminology here are some definitions.

Solution Heat Treatment:
A treatment in which an alloy is heated to a suitable temperature and held at this temperature for a sufficient length of time to allow a desired constituent to enter into solid solution, followed by rapid cooling to hold the constituent in solution. The material is then in a supersaturated, unstable state, and may subsequently exhibit Age Hardening.

Aging:
A time-temperature-dependent change in the properties of certain alloys.

I haven't been completely brought up to speed on the process since we changed over from using T6 to T61, but I believe the cooling is done with a quench tank.

Our Billet blocks are machined dead soft, then heat treated, and then finish machined.

On a side note -
Jack is now a living legend here at Dart. Ever since being on TV he even has people to fetch his coffee for him.


:D:D

lol, I have talked to Jack and he was just as calm on TV as he is on the phone,, i would have been "we at D D D D D Dart wo wo wo work