CPM154 at 62hrc =interesting

gerogejg

gerogejg

Joined
Nov 30, 2013
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A few months ago I decide to make myself a light use small slicer out of CPM154 .when it came time to send off to Heat treat I sent the blade Paul Bos heat treat and decided on 62hrc because why not I figured it would be interesting to compare to other steels I had. A few months went by and I didn't really like how the steel was performing it held a edge very well but chipped way too easy to be more useful other than cutting cardboard in my opinion, then one day I was sitting round the garage an there was a piece of hard wood shovel handle laying around so I picket up a 2×4 to hit the spine of the knife to see what would happen because why not .by the way the blade thickness is .08" .when I got done the blade didn't snap as I expected and the only damage was literally an 1/8" wide dent on the blade and no cracks. What's interesting is how can the steel be so brittle on a thin blade and not break when being abused.uploadfromtaptalk1407119475733.jpguploadfromtaptalk1407119486099.jpg
 
You haven't really learned anything.
Just because it didn't break in two, doesn't mean there aren't some invisible, incomplete fractures in the blade.
The dent instead of chipping is interesting. Try to think of a new, different test that will give more info. It may be the previous usage caused the cchipping, rather than the blade quality.

If you have decided a knife is only good for cardboard, why not play with it.
 
mtangent said:
You haven't really learned anything.
Just because it didn't break in two, doesn't mean there aren't some invisible, incomplete fractures in the blade.
The dent instead of chipping is interesting. Try to think of a new, different test that will give more info. It may be the previous usage caused the cchipping, rather than the blade quality.

If you have decided a knife is only good for cardboard, why not play with it.
Click to expand...
I agree with you I figure there must some some kind of micro chipping but none that I could see. In the future I will do an edge holding test.
 
A few years ago I've had Benchmade Nimravus 154CM reground(thinned) and rehardened to 62HRC. Works just fine with the edge ~10 per side. Used as a utility knife. So far no chips. Aside from cardboard, it had to deal with plastic, rubber, wiring including copper, coax - rg59 and rg-61, wood whittling, etc. Works pretty well in the kitchen too, obviously it can't compete with 12" chef's knives, but still, for its site it's a very solid performer.
 
I sure would like to experience 1095 at 62 instead of squishy 57....
Of course a dented knife is better than two smaller knives....
 
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