[TheForge] RE: 4140 heat treat
Bob Ehrenberger
[email protected]
Mon Sep 15 13:16:00 2003
The method recomended by John Murry (who has made hundreds of hammers from
4140) is the bring the face to critucel by placing face down on the coal
fire, and cool with running water poored on the face of the hammer. He
either dumps a 5 gal bucket of water on each hammer or uses running water
from a hose. For the pien he heats pien down on the fire and then cools in
the slack tank by holding pien up and using a dipper to dump water over the
pien. That way the pien isn't quite as hard as the face. He then tempers
in the oven at 400deg.
Of course before heat treating he anneals them and does the grinding on them
while soft. When heat treating he is careful to not let the eye get too hot
so it stays soft and is not likely to crack under use.
Bob Ehrenberger
Shelbyville, Mo
Date: Sat, 13 Sep 2003 10:51:08 -0400
To: [email protected]
From: klgeorge <[email protected]>
Subject: [TheForge] 4140 heat treat
Reply-To: [email protected]
I got some 4140 1 3/4" square and am going to attempt to make some
hammers.What's the heat treat?