Blade smithing

Chris Cramer

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I looked up the use of dry ice for blade cryo treatment, and most people just create a dry ice bath using alcohol or acetone mixed with dry ice to transfer the heat from the blade more evenly.
 

Chris Cramer

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I finished my meat carving knife forged out off the new CPM magnacut. In comparison to some high performance steel like cpm 4v with high vanadium, the powder metallurgy and slightly lower level of chromium gives it higher corrosion resistance along with the balance of high hardness and toughness.
The handle I made from some custom scales I found on etsy made of resin.
 

Chris Cramer

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I followed the best heat treatment given by Larrin Thomas, the designer of the metal. I used plate quenching to prevent the thin 12 gauge blade from warping.
 

Chris Cramer

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Yeah, I ordered that book a while ago, along with a book on Damascus steel. It has a lot of useful information.
 

Chris Cramer

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I've now furnished the bowie knife that I began working on before my meat carving knife. This blade was also made out of CPM magnacut, for the performance as a hunting knife or survival knife. The edge is extremely sharp, and slices through wood just like a swiss made carving knife. The balanced hardness and toughness of the steel makes it work well for chopping wood as well. I am pretty confident that the heat treatment was very successful, and that the cryo treatment simply with our deep freezer made a difference to. This time I found a way to polish the hard stainless blade to a mirror finish, using very fine sanding discs with my angle grinder instead of polishing compound.
When ever I make a certain knife for the first time, I feel determined to do my very best. With all my creativity I decided to make it more decorative. I acid etched a flame pattern into the blade face, I shaped the brass ring guard inserted into the fiberglass handle, and added another dragon pommel. Though all this work can create a beautiful knife, it makes it worth so much more than someone would pay for a bowie knife. There are some magnacut knives online that are sold for over $600 which could be acceptable for this blade; however people would buy this more as an ornamental peice of art.
 

Chris Cramer

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I did some more research on cryogenic treatment of alloy steels in LN vs dry ice, and it turned out that the difference in hardness between steel cryo treated in LN vs dry ice would make it worth purchasing a dewar for LN. I got a 3L dewar from Vevor for 200 dollars, but it comes empty, where could I get it filled?
 
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Chris Cramer

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I contacted praxair which is Linde now, and the cost for only 4.5 L of LN is $180! I'm not sure how long only 4.5L would last, and if it be worth the cost of $180.
 

Chris Cramer

Well-Known Member
Premium Member
You supply your own. The dewar I got from Vevor is only 3L, and I was unaware that the minimum they can fill is 4.5L, so I'll probably have to get a 6L dewar, and find a way to influence Vevor to allow me to return the 3L dewar.
 
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