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knife grinding question
osage outlaw:
I screwed this one up big time. I was on my third round of heating to normalize the blade and I got the tip to hot. Osage coals can put off a lot of heat. I'll try to regrind the tip after it cools off. It was looking so good to.
KHalverson:
I only grind to about the thickness of a dime before heat treat.
I then hand sand the blade long ways with 120 grit to get rid of stress risers that can cause cracks during quench.
as far as normalization goes .
I heat to 1 color past non magnetic when the blade has cooled to a black heat I go back into the forge and heat it back up to just non magnetic.
and the third time I go to just before non magnetic.
after that you can heat back to non magnetic and edge quench that file in canola oil heated to 120 f and then temper out @ 375-400 for 2 hours
osage outlaw:
KHalverson, I read some of your older posts about heat treating. I tried following the way you did it. I didn't have any canola oil so I used vegetable oil. I heated it up before I quenched the blade. It didn't flame up like I've seen on videos. I ran a file across it after it cooled off and it didn't bite so I think I got it somewhat hardened. I'll do the tempering tomorrow. Should I do one heat in the oven or two sessions?
I lost about a 1/2" of length on the blade and had to do some reshaping on the tip. It's not as good as it was the first time but it should still do the job.
burchett.donald:
Nice save on that tip/knife Clint...I would recommend 2 temper sequences at 2hrs. each at 450...K.Halverson may give better advise on file knives...I generally work air cooled steel...154cm. Soooo many different recipes for different metals....That looks like the perfect size blade to skin a deer, Seen a lot of guy's cutting their knuckles with big blades... >:D
Don
KHalverson:
nice save!
if a sharp file doesn't bite you got it hard enough.
do 2 heats @ 375-400
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