No, Joe,
Annealing is used to relieve "work hardening" in metals and other materials
caused by bending, and the process makes the materials more maleable again
(able to bend). Have you ever seen a blacksmith at work? He pounds away at
red hot iron for a while and then puts it back into his furnace to heat up
to red heat again before pounding on it some more. The heating process
allows the internal stresses that have built up by working the metal to be
relieved, and make the workpiece capable of accepting further work.
Try it yourself. Take a piece of thick copper wire and bend it backwards
and forwards for a bit. You notice it will become increasingly difficult to
bend. This is work-hardening as the stresses are built up, and if you
continue to force the copper to bend, it will become brittle and break
eventually. If, before it breaks, you heat up your bent copper (not a
corrupt policeman, for you Brits out there) to a few hundred degrees for a
little while and allow it to cool slowly, you will find that you can bend
it easily again. The copper has been annealed. Get the picture?
Peter
Joseph Spicuzza
<jspicuzza@COMPUN To: [log in to unmask]
ETICS.COM> cc: (bcc: DUNCAN Peter/Asst Prin Engr/ST
Sent by: TechNet Aero/ST Group)
<[log in to unmask]> Subject: Re: [TN] hole wall pull away and
resin recession
01/11/02 12:36 AM
Please respond to
"TechNet E-Mail
Forum."
Thanks Steve,
A follow up question: Does the copper then get more brittle? To a point
that
the processing should change?
Joe
Quoting Steve Owen <[log in to unmask]>:
> Joseph,
>
> Anneal
> 1 To temper or toughen (something) by heat treatment to remove internal
> stress, crystal defects, and dislocations.
>
> Steve.
>
> -----Original Message-----
> From: Joseph Spicuzza [mailto:[log in to unmask]]
> Sent: 10 January 2002 15:48
> To: [log in to unmask]
> Subject: Re: [TN] hole wall pull away and resin recession
>
>
> Rich,
> I must be braindead this morning, expound on "anneals" if you would,
> rather, remind me what that means.
> Thanx
> braindead Joe
>
> Quoting [log in to unmask]:
>
> > Joe
> >
> > remember that baking also anneals the copper
> >
> > Rich Fudalewski
> >
>
>
>
> Joseph Spicuzza
> Quality Assurance Supervisor
> Advanced Interconnect Products Division
> Compunetics, Inc.
> ph: 412 858-6166
> fax 412 373-8060
> [log in to unmask]
>
>
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Joseph Spicuzza
Quality Assurance Supervisor
Advanced Interconnect Products Division
Compunetics, Inc.
ph: 412 858-6166
fax 412 373-8060
[log in to unmask]
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