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

[Kevin D]

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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