Re: Annealing copper was (My Primary Coil disaster)

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Mark Broker by way of Terry Fritz <twftesla-at-qwest-dot-net>" <mbroker-at-thegeekgroup-dot-org>

Marc,

What you are describing is the annealing (tempering) process for steel.
That is a completely different beast than copper, brass, and aluminum.  I
remember trying to "quench" 
a piece of copper to make it harder....  Boy was I ever surprised when it
was soft, not hard!  That was the semester after I took "Engineering
Materials," which covered almost 
exclusively the hardening of steels, and was hoping copper would behave
similarly....  maybe not....  

Others have posted good info on tempering/annealing copper and aluminum, so
I won't repeat it - just thought I'd clear up this issue a bit before The
Moderator quenches the 
topic :)

hehe.  couldn't resist :)

Mark Broker
The Geek Group's Chief Engineer


11-26-2001 1:32:06 PM, "Tesla list" <tesla-at-pupman-dot-com> wrote:

<snip>

>Annealing metal requires it to be brought to temp and cooled at a slow,
>set rate. sometimes the metal is cooled some and then heated back up to
>a set temp, cooled down, heated, repeated many times.
>I remember seeing the charts from an annealing furnace when i worked at
>a small steel mill here in orwell, the temp rose and fell over the
>period of days.
>I looked in my machinery's handbook and it covers annealing of steals,
>but so far nothing on copper, But i have an old copy (nineteenth
>edition) maybe a newer edition will say? I could scan the pages and send
>if interested?
>My metallurgy books burnt in my barn fire so no help there.
>Hope this might help some,
>Marc M.