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

[Kevin D]

Danke

  ------Original Message-----
  -From: theforge-bounces at mailman.qth.net
  -[mailto:theforge-bounces at mailman.qth.net]On Behalf Of Chuck Robinson
  -Sent: Friday, January 14, 2005 1:47 PM
  -To: Sponsored by ABANA
  -Subject: Re: [TheForge] Re: You can always tell a Yankee...
  -
  -
  -Kevin,
  -Air hardening steels don't generally need a separate normalizing
  -heat. The
  -grain refinement occurs as the temperature drops below critical.
  -With simple carbon steels, Jim Batson recommends normalizing 3
  -times before
  -the hardening quench and then drawing the steel in an annealing oven
  -immediately.
  -Works for me.
  -Chuck
  ------ Original Message -----
  -From: "Kevin D" <flyinpig at go-concepts.com>
  -To: "Sponsored by ABANA" <theforge at mailman.qth.net>
  -Sent: Friday, January 14, 2005 5:49 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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