Does DLC Coating Heal ? Or is it Magic ?

N

NjMS

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Feb 8, 2016
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I've noticed recently that the DLC coating on my PM2 seems to re-heel if scratched to the point when I can see metal. I've marred it before and noticed after a regular oil it seems to come good and the marks disappear. But they have only be marks, not deeper scratches.

Yesterday I stupidity removed my lansky without loosening the front screw on the clamp enough and it scratched the finish to the point it was nearly the size of the initial in front of the spider hole (I was not happy with myself) .

Today........ It's back to being black. It's like the scratch /mark slowly shrunk to the point it's now gone.

I'm calling witch magic....
 
You may not be seeing the metal of the blade. You may be seeing the metal left behind from the part doing the scraping.
 
Really. I hadn't thought of it like that. Your probably right but have spoilt my theory on magic.......
It's odd that I hadn't wiped away at the so called scratch.
 
NjMS said:
Really. I hadn't thought of it like that. Your probably right but have spoilt my theory on magic.......
It's odd that I hadn't wiped away at the so called scratch.
Click to expand...

True DLC is very hard and doesn't wear easily. It's way more likely the wear is actually residue from what you're cutting.
 
I heard they burn incense, tickle the testicals of roaches and use a broom to sweep up after when applying the dlc coating. So there may be a little bit of magic in the coating.;)
 
Agreed with the other posters. It's the other material rubbing off on the DLC coating. The DLC is way harder than just about anything else it'll touch. I'm not sure on the exact number for its Rockwell hardness but from memory I thought it was in the 70s. The hardest of steel knives are usually mid to upper 60s at best. Aluminum and other much softer things don't stand a chance abrading the DLC.
 
DLC is a primitive symbiote, which feeds off of the molecules of the items that have been cut, and in turn protects the host steel from damage.
 
This is fascinating. I had no idea the DLC was that tough/scratch-resistant. This opens new possibilities for me.
 
Dlc coating is like the black stuff that created venom from Spider-Man. It's not magic it's alien
 
Not as tough as I thought,had a small spot of rust on my DLC Manix 2 XL used my finger nail to scratched it away and what surprised me was how the coating was also removed.Down to bare metal
 
razorburn said:
Not as tough as I thought,had a small spot of rust on my DLC Manix 2 XL used my finger nail to scratched it away and what surprised me was how the coating was also removed.Down to bare metal
Click to expand...

I think it is possible (even likely) that the rust had crept under the DLC if it came off that easily. Properly applied it is quite tough stuff. I've seen Rocksteads with rockwell's around 66 put through some fairly aggressive use and maintained their amazing smokey-mirror finish (I recall reading that the DLC registered about 90 rockwell).
 
As has been said, DLC is really hard and extremely durable. I have several DLC coated blades and none have seen any significant wear. Only my blem Blur has any issues with the coating but I'm pretty sure that is why it was considered a blem, plus I use it on my boat and it don't really make an effort to take care of it at all.

For reference, among the other things DLC coatings are used for include the lining or AR rifle barrels and the flex joints of orthopedic implants.
 
It looks pretty decent on a high polish surface too... (had to take that second pic to stay Spydie-legal :) )



 
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