The first knife I ever cracked in heat treat, and it's AEB-L

Kevin McGovern

Kevin McGovern

Joined
Jul 31, 2015
Messages
3,118
Wow. I just did post heat treat grind on this santoku at 36 grit and found this crack. This is one that was not quite cool enough off the plates when I put it in the DI. I need to slow down next time.



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I want to grind this back and make a shorter in height knife out of it. Is that viable? If so, what type of kitchen knife could this become?
 
currently this is 42mm high at heel, 160mm edge. the crack extends up the edge 4mm but I will take it up a bit past that. So I think I could still make it a santoku, but I will have to rework the entire bevel on both sides. thoughts?
 
Make the profile more triangular. Will be just fine. No need to shorten the whole thing.

Hoss
 
That sucks, but it still looks great. At least you were able to save it. I don't think the shape is compromised at all.
 
I've had AEB-L crack in a similar way, out of HT... at full thickness, .098". Was in from the edge, about like that. It may have happened during cryo, I didn't notice until actually hand sanding the beveled blade. It was pretty surprising to me.
 
Many a W2 slicer knife became a paring knife by grinding back the cracks from a water quench.
 
Profile looks great. I would never guess you altered it. Really like the blue bolster with that wood.
 
Thanks for the feedback all. My wife has her eye on this one, as the wood is from a hard maple I harvested from her parents house five years ago. I usually make two of the same knife, especially when trying something new. So here is the sister to that knife, that is for a customer.
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