|
THE PROCESS:
"Cryo"
means cold, but that's not the whole story. Everything we process gets frozen
to temperatures below -300 F. We use several different time/temperature
profiles depending on certain variables like maximum wall thickness and total
mass being processed. There are pauses in the process where the items can rest
before further temperature descent. Then everything is held down at
temperatures below -300 F for 12-40 hours. The process is so gentle; we can
even process light bulbs!
Wear
parts like tools, gears and much more are then subjected to one of many
different heat tempering processes. Here, the variable is the material itself.
We use different temperatures for different metals. We use a triple tempering
process that brings the material to a specific temperature three times. By
using fans and well-insulated chambers of our own design and constructions, we
can insure uniform temperatures in the chambers and avoid stratification that
can result in items that do not see the full benefit of this process.
WHAT HAPPENS?
At
the extreme cold level several things happen. In carbon-based metals three
things happen. First, the softer Austenite structure of the metal is completely
converted to the harder Martensite structure. Next, the existing carbon
molecules are evenly dispersed. Finally, many small carbide particles are
created that fit between the existing larger carbon particles.
Castings
are stress relieved. The material alignment at the molecular level is enhanced.
While dimensions ARE NOT CHANGED, the surfaces are slightly smoothed.
This smoothing of the surface is not visible. In other words, a matte finish
does not become glossy. Many plastics become more uniform. Metal parts become
harder, but less brittle because of their uniform structure. They become
tougher, too. Metal items become more corrosion resistant due to the slight
smoothing effect on the surfaces. Items show less resistance to electricity.
|