I just saw an article in my local paper about a company in York
Pennsylvania U.S.A., near where I live, using cryogenics to extend
the life of metal objects and thought that this would be a way to
extend the life of saw blades etc.
Here is how it works, they use liquid nitrogen to super-cool objects
to minus 320 degrees Fahrenheit for between 12 and 20 hours. Then
they gradually warm the chamber to room temperature so as not to
deliver a thermal shock to the objects inside. For metallic objects,
like slicing blades, a heat cycle of 300 degrees Fahrenheit follows.
It alters the crystalline structure of the metal in a beneficial way
causing metal objects to wear longer. This works for bearings that
often wear out frequently. It works on shotgun barrels, saw blades,
engine parts, and anything made out of metal.
This sounds like a really great idea to extend the life of metal. I
think it would be worth looking into for tools etc. Here is how you
can reach this company: www.FountainheadCryo.com
Roxan in Pa.