knife makers opinions.

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wannabuckbiotch

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I don't know where to post this but here it goes. Does bark river way of grinding their knives hurts the edge of the blade? Some calls it burnt edge. Also flash soaking it and messing up its HT. So I know that you won't mess up the HT until 300-400 degrees but the way i see them do it they have no means of knowing what temperature they're at while grinding.
 
lol..
 
I am not sure exactly what you are asking. If you are referring to their convex edge, there is nothing unusual about that.
Properly done it does not effect the heat treat.

I am also not sure what you mean about flash soak in the heat treat. Mike Stewart has never released exactly what his heat treat process involves, other than to say that each knife is triple tempered and subzero quenched. That normally involves a low temperature stress relieving soak followed by bringing it up to full heat for top hardness for the particular steel, then two tempers, a subzero soak, then a final temper. Someone more knowledgeable about heat treating could certainly add more. Bark River knives have a very good reputation.
 
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"Bark River knives have a very good reputation." Do a search on Mike Stewart in the GB&U.
 
This poster seems to have browsed all the sensational videos from some YouTubers and now he means to start some drama.
I do not see him being around long.
 
RI_Shooter said:
I am not sure exactly what you are asking. If you are referring to their convex edge, there is nothing unusual about that.
Properly done it does not effect the heat treat.

I am also not sure what you mean about flash soak in the heat treat. Mike Stewart has never released exactly what his heat treat process involves, other than to say that each knife is triple tempered and subzero quenched. That normally involves a low temperature stress relieving soak followed by bringing it up to full heat for top hardness for the particular steel, then two tempers, a subzero soak, then a final temper. Someone more knowledgeable about heat treating could certainly add more. Bark River knives have a very good reputation.
Click to expand...

i watched a video on youtube where cliff said something like that, it involves dipping it in water while grinding it so fast and produces a lot of smoke. this is the video for better understanding of what i meant http://youtu.be/Io38wpBLNfg
 
wannabuckbiotch said:
i feel like he's talks a lot of nonsense and personally i want to know what the real bottom line of it
Click to expand...

The bottom line of it is Cliff Stamp likes to create controversy for his own selfish reasons and doesn't always entirely know what he's talking about. Sharpening wet and dry after heat treat has been industry standard since time immemorial. Shaping is done prior to heat treat and final sharpening is done after.Without cooling the blade while sharpening, there is a greater chance of burning the blade.
Can you burn a blade while sharpening? Yes. But it takes 300-400 degrees to do so.

I've watched the video Mr. Stamp references.
Sharpening or Cooling the blade in such a manner as in the video should not affect the temper of the blade. I'll tell you why. In the video he references you see those guys using slack belts and buffers. You see them with their fingers on the blade as they're sharpening. If they were getting the blades hot enough to affect the heat treat, they would not be able to handle the blades as they are in that video. They would be burning their fingers and would be doing so rather quickly.
 
My advice, pick up the phone, talk to makers that do post heat treat grinding, thereby, only the blank has been water jetted, no grinding has been done and they will tell you that they take extreme care when grinding a blade post heat treat. Minimising heat build up and avoiding rapid quenches.

The first place I heard of this issues was not on the forums but on CATRA and how overheating can affect corrosion resistance. From there I talked to makers and most of them know that this issue will affect edge performance as well.

http://www.catra.org/pages/products/kniveslevel1/bod.htm

Then I read this:

"This test sytem is extremly sensitive when measuring the cutting edge "softening" effect which is created by overheating the edge by agressive dry power sharpening techniques and machines. "

http://www.catra.org/pages/products/kniveslevel1/slt.htm

From there it stands to reason for me at least that if care is not taken one can really screw up a knives edge if one does power sharpening.
 
I received a brand new knife from Benchmade. The tip was discolored blue from being overheated during sharpening. They replaced it under warranty.
 
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