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Thanks. Interesting stuff!

Well, I guess the article did mention that tool steel was used. Very interesting none the less...

Dry ice is -109 degrees F (according to a quick search...). One of the articles mentions cold...

I'm not a mettalurgist, nor a blade forger, but I did have an opportunity to use a cryo treatment for a investigation project here at work (I work at an R&D lab).

Some interesting articles you...