D2 is a special steel. Has properties beyond its composition. Idk what it is. Must be the big, elongated, widely spaced carbides. What do you guys think? You know what I mean by elongated carbides? When roll milled the spherical carbides are drawn out. You’ll see it in micrographs. And if you make your knife along the grain, you’ll potentially have a 30 micron long exposed carbide at the edge… maybe high potential to break or fatigue (the carbide itself) but still, the working edge feels like this when degraded from razor as properly sharpened with diamond. Then I got to thinking how cool would it be if we could 3D print microstructures. Place filaments of carbide that expose at the edge leaving larger areas of pure matrix to reduce the likelihood of fracture that’s experienced with lots of carbide volume.
Excellent thinking on how to arrange carbide band perpendicular/vertical to edge, thus more matrix and has carbides serve as saw teeth. I've a pile of D2 blades with cross-grain orientation(vs 99.9% of use is with-grain). In fact - I've a D2 paring blade in this batch arranged cross-grain(along with all these folder blades), where expected wear resistance is higher however trade off some strain fracture toughness.
Whats the BTE thickness? If i remember correctly, youre not a fan of rope cutting as an indicator of performance; how much of an improvement was there in your usual testing method?
I am not sure but it seem to persist after the re-hardening process. It sand off feel soft like cerakote not DLC, also I don't think DLC would dissolve/fall-off at 1850... just my guess
Bringing back D2 supersteel status, incredible work as always Luong.
Thanks but here I just ask how useful this test is: www.bladeforums.com/threads/rope-cutting-test-usefulness.2018829/
Incredible!
Thanks
D2 is a special steel. Has properties beyond its composition. Idk what it is.
Must be the big, elongated, widely spaced carbides.
What do you guys think? You know what I mean by elongated carbides? When roll milled the spherical carbides are drawn out. You’ll see it in micrographs. And if you make your knife along the grain, you’ll potentially have a 30 micron long exposed carbide at the edge… maybe high potential to break or fatigue (the carbide itself) but still, the working edge feels like this when degraded from razor as properly sharpened with diamond.
Then I got to thinking how cool would it be if we could 3D print microstructures. Place filaments of carbide that expose at the edge leaving larger areas of pure matrix to reduce the likelihood of fracture that’s experienced with lots of carbide volume.
Excellent thinking on how to arrange carbide band perpendicular/vertical to edge, thus more matrix and has carbides serve as saw teeth. I've a pile of D2 blades with cross-grain orientation(vs 99.9% of use is with-grain). In fact - I've a D2 paring blade in this batch arranged cross-grain(along with all these folder blades), where expected wear resistance is higher however trade off some strain fracture toughness.
Impressive. 👏👏
Thanks
Whats the BTE thickness?
If i remember correctly, youre not a fan of rope cutting as an indicator of performance; how much of an improvement was there in your usual testing method?
~0.008" BET. No improved cutting technique but used a vise+2x4 for backing was great which allowed me to finished the test.
What is the blade coating?
I am not sure but it seem to persist after the re-hardening process. It sand off feel soft like cerakote not DLC, also I don't think DLC would dissolve/fall-off at 1850... just my guess