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Author Topic: cpm154 small survival knife test. card board boxes  (Read 2290 times)
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chad2
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« on: July 06, 2013, 07:26:08 PM »

252 cuts and it almost cant cut paper! pretty good if you ask me especially for a 500 degree temper

there is a cut counter in the bottom left corner. when i was editing the video the lettering was white but when i uploaded it the lettering turned out black that was 5 hours of editing down the drain!

check it out

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« Last Edit: July 07, 2013, 08:33:29 PM by chad2 » Logged
mreich
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« Reply #1 on: July 07, 2013, 07:36:45 PM »

Nice! Do you have sharpening choil? Seems like you got hung up in front of the ricasso fairly often, whereas your slow and smooth cuts looked really good!

How do you sharpen her? Difficult to sharpen?

I have no clue on HTing cpm stuff. Did you have to wrap her in foil and all that? Quench plates?

Any idea of Rockwell? Edge flexing? Blade flexing?

Stock removal?

Thanks for sharing!
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chad2
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« Reply #2 on: July 07, 2013, 08:32:55 PM »

1. Yes I do have a sharpening choil. You live and you learn.
2. I have a sharpening system similar to the edge pro.
3. She is not hard to sharpen but she does not strop very well, except for very last polishing of the edge.
4. My heat treat consists of, ss foil wrap the blade single layer double fold, normalize blade once= place foil wrapped blade in room temp kiln, ramp temp at 1275 degrees to 1275 degrees. this is so that it takes an hour to get to 1275 degrees, then soak for 2 hours, then air cool still in the foil. Then I place blade in a room temp kiln ramping it at full to 1380 degrees 0 soak then it ramps at a rate of 1400 degrees to 1450 soak 10 mins then it ramps at full to 1880 degree 0 soak then it ramp at a rate of 1500 degrees to 1975 degrees soak 30 mins, then I quench the foil wrapped blade between two, 1 inch aluminum plates that have been chilling in my fridge from the start of the hardening process, my plates are on the ground so to promote a good flat blade I stand on the plates, about 1 min of quenching and the blade will be warm to touch. At this point I cut the blade out of the foil and set it into my dryice acetone mixture that I put together 15 mins before the blade came out of the kiln add dryice if needed, while it is sitting in the dryice I am open door cooling the kiln it takes my kiln about 2 hours to get down to around 400 degrees then I ramp it back up to 500 degrees let it cycle for 20 mins, during this 20 mins I let the blade warm back to room temp place unwrapped blade into kiln for 2 hours then I quench in a big tub of cold running water to help with any Ra then I place blade back into dryice acetone mixture for 30 mins all the while the kiln is still at 500 degrees I pull the blade out and let it warm to room temp then back into kiln at 500 degrees for 2 hours air cool.
5. Rock well will be around 59 to 60 hrc
6. I did not do an edge flex on it but I have flexed the blade many times well past 20 degrees which is very good for this high of hardness and size of blade.
7. Yes stock removal, there is really no other way to do it, and if ther is I would not try and forge cpm154 steel.

Hope this helps!  Grin
« Last Edit: July 07, 2013, 08:37:39 PM by chad2 » Logged
mreich
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« Reply #3 on: July 07, 2013, 10:50:02 PM »

Great explanation Chad, Thanks a Bunch for taking time to go into detail!
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chad2
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« Reply #4 on: July 07, 2013, 11:36:03 PM »

What ever I can do to give back a little piece of info compared to the enormous amount of information I have got from you guys
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Ed Fowler
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« Reply #5 on: July 09, 2013, 06:22:16 PM »

You are ding very well with your steel and not afraid to demonstrate its qualities honestly as well as your process developing the blades.

I thank you for sharing with us.
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Ed Fowler High Performance Knives
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chad2
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« Reply #6 on: July 09, 2013, 11:27:26 PM »

I wish other people would do this so I would have some comparison, but there is no videos to the extent that I test at. So I have decided  to video all of my tests so that I and others can see and compare there results in the same way that I am. I also want to show that testing yourknives can be very fun and cheap.
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