[TheForge] Re: You can always tell a Yankee...

[Dan Tull]

or toughness, or springyness.
dan tull
georgia
abba, afc, S.C. psba, obg,sofa
----- Original Message ----- 
From: "Darrell" <darrell at machinemaster.com>
To: "Sponsored by ABANA" <theforge at mailman.qth.net>
Sent: Friday, January 14, 2005 2:14 PM
Subject: Re: [TheForge] Re: You can always tell a Yankee...


> Normalizing has to do with grain size while hardening and tempering has to
> do with hardness.
> Darrell
>
> http://www.machinemaster.com
> ----- Original Message ----- 
> From: "Kevin D" <flyinpig at go-concepts.com>
> To: "Sponsored by ABANA" <theforge at mailman.qth.net>
> Sent: Friday, January 14, 2005 3:49 AM
> Subject: RE: [TheForge] Re: You can always tell a Yankee...
>
>
>> Chuck,
>>
>> Thanks, but does that mean air hardened steel is normalized, as that
> sounds
>> pretty close to hardening process?
>>
>> Kevin
>>
>>   ------Original Message-----
>>   -From: theforge-bounces at mailman.qth.net
>>   -[mailto:theforge-bounces at mailman.qth.net]On Behalf Of Chuck Robinson
>>   -Sent: Thursday, January 13, 2005 11:53 PM
>>   -To: mspencer at tallships.ca; Sponsored by ABANA
>>   -Subject: Re: [TheForge] Re: You can always tell a Yankee...
>>   -
>>   -
>>   -When you normalize carbon steel you bring it to about 50 degrees F
> above
>>   -critical and let it air harden in still air, to black heat.
>>   -It is a thermal  grain refining process.
>>   -If you bring the steel to forging temperature much over critical you
> will
>>   -get grain growth and consequently brittle steel. the thickness
>>   -of the metal
>>   -will affect how fast the metal cools and consequently how hard the
> cooled
>>   -metal will be.
>>   - The less carbon and other alloys in the steel the less effect
>>   -the cooling
>>   -rate will change  the hardness.
>>   -Chuck
>>   ------ Original Message -----
>>   -From: "Mike Spencer" <mspencer at tallships.ca>
>>   -To: <theforge at mailman.qth.net>
>>   -Sent: Thursday, January 13, 2005 5:55 PM
>>   -Subject: [TheForge] Re: You can always tell a Yankee...
>>   -
>>   -
>>   ->
>>   -> > For our use, I wonder what the real difference is between
>>   -> > "normalized" and "as forged"?  As long as the last heats you don't
>>   -> > beat stresses into it.
>>   ->
>>   -> I dunno, Dan.  Sam Allen, the prof at MIT who is also a blacksmith
> and
>>   -> has a forge shop in the basement of the main building there, wrote a
>>   -> first-year textbook for materials science.  I keep meaning to order
> it
>>   -> but it keeps getting put off.  I'm not completely clear on the
>>   -> difference, at the crystal or grain level between annealing and
>>   -> normalizing.  (Hence the scare quotes around those words in my 
>> post.)
>>   ->
>>   -> - Mike
>>   ->
>>   -> --
>>   -> Michael Spencer                  Nova Scotia, Canada       .~.
>>   ->                                                            /V\
>>   -> mspencer at tallships.ca                                     /( )\
>>   -> http://home.tallships.ca/mspencer/                        ^^-^^
>>   ->
>>   -> --
>>   ->
>>   ->
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