Re: [CAD_CAM_EDM_DRO] Re:heat treat nomenclature

These learned arts are especially useful when the closest heat treater is
300 miles away. I have trouble getting them to stop by after work to pick
up and return the next day for $15. I am sure that there are many on this
and other lists who are in the same boat. There are a number of books on
EBay on this subject, if anyone is interested in learning more. While what
I have learned may not be perfect but it has served me well for many years.
So take what I pass on with a grain of salt.

Bruce

-------Original Message-------

From: CAD_CAM_EDM_DRO@yahoogroups.com
Date: 03/01/05 21:27:06
To: CAD_CAM_EDM_DRO@yahoogroups.com
Subject: Re: [CAD_CAM_EDM_DRO] Re:heat treat nomenclature

Hi Wally:
Heating to above the critical temperature "Cherry red" and quenching is
called hardening.
Re-heating a hardened piece to some temperature below (usually substantially
below) the critical temperature and then cooling is called tempering.
Reheating to above the critical temperature and cooling slowly is called
annealing.
This last cycle can also be used for stress relieving or normalizing, but is
normally done at somewhat lower temperatures.
All are heat treating of one sort or another.
Cheers

Marcus





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