Yea man. It’s something I have wanted to try. Once I experiment with doin all the hand sanding before heat treat I’ll let you know if it works.
@stuartdavenport2952
5 ай бұрын
I know this is a year old, but some tips......No need to heat the knife prior to applying ATP. Brushing it on is just fine. Just make sure that prior to application it is COMPLETELY degreased and then washed in soap/water. Use a hair dryer or heat gun once the ATP is applied. It will turn from dark gray to light gray. ATP does protect from scale quite well, but most importantly it protects from decarb. Decarb is INSIDE the steel, scale is outside. Sometimes the flux in ATP does indeed cause divots, depending on alloy it seems to me. And the big one....NO....ATP will NOT negate the need to go back to hand sanding/grinding. Besides, the edge needs to be left thick on a carbon steel knife during hardening/quenching, and you need to grind post heat treatment regardless to thin it out. Carbon steels, due to the violent nature of oil/water quench, need the edge to be left much thicker than final dimensions. Prior to heat treat, the edge needs to be around 0.030"-0.050", way to thick to just sharpen from there. Depending on application, edge thickness prior to sharpening should be 0.010" or less for such a knife as the one shown in the video. Stainless steels, or tool steels that are plate or air quenched, can be taken to final dimensions pror to heat treat, but then again ATP does not work well with the higher temps required for stainless and tool steels. It is rated up to 2300F if memory serves, but that would require an extremely thick coat of ATP, and I don't know of a single maker who has successfully used ATP for stainless or tool steels that heat treat above ~1750F. It works for A2, but above A2 temps, it just doesn't. Best to use SS foil with SS and tool steels. The biggest benefit of ATP is not that it protects from scale formation, scale can be removed with vinegar and/or grinding. ATP shines because it protects from decarb, which can only be removed by grinding. Make sure that you sand down that edge apex just a tad post heat treat. While ATP does do a great job protecting from decarb, it doesn't 100% stop it. There will be a few thousandths of decarb left, and that decarb needs to be removed, especially at the edge. There are a few reasons why people who receive their knives (factory or custom) only to have the edge retention improved after a few sharpenings. Two reasons for this....a bit of decarb at the edge caused by inadequate removal of decarb, or they overheated the edge during post heat treat grinding and/or sharpening.
@4wknives
5 ай бұрын
Wow. That is a wealth of knowledge. Thank you very much for sharing and for watching the video
@4wknives
Жыл бұрын
Anyone know or have a guess of what type of canister Damascus was used to make the blade in video?
@melgillham462
Жыл бұрын
Nails? I mostly hear about anti scale in the stainless steel world. Most I've asked about it dip the knives just for expedience. Then use a heat gun to dry the compound. I've had no experience with it myself.
@4wknives
Жыл бұрын
@@melgillham462 close on your guess. It is fish hooks. Left over from a previous video. I did see where some dip knife in the compound.
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