AEB-L Burning?

[StuNY]

Just did my first batch of AEB-L knives this weekend, really like this stuff!
I noticed something new in grinding this that I haven't seen with the 52100 I have been grinding. After heat treating (62 after HT/Dry ice/350 tempers) as I ground the steel with everything from 120 grit down to 400 I found that a fine metal powder would cling to the trailing edge of my blade. Then as a spark came around the wheel it would ignite the powder and actually sit an burn on the blade! The air passing by contributed to the burn I'm sure but at one point on a very thin Gyuto I found it had burned a divot through the blade about .04" into the edge! Anybody see this before?

 

[mnavarro]

I've actually had the same thing happen to me. About an inch in a half from my plunge line a little divot developed and it burned right through the blade. I think I went too thin on the grind. Does it look like this?

[/URL][/IMG]

[/URL][/IMG]

 

[StuNY]

I've actually had the same thing happen to me. About an inch in a half from my plunge line a little divot developed and it burned right through the blade. I think I went too thin on the grind. Does it look like this?

It looks something like that, but on the very edge of the blade. It also sat there burning with a red/white hot glow. But it was a "clump" of this powder that would light each time a spark hit it. Think of like a clingy lint dangling off the blade. A ball of the "lint" would sometimes come off and travel around the belt on fire. It was at it's worst when I was grinding lengthwise on the flat platen- forming distal taper etc. The little lint balls would just dangle down the length of the blade and start burning away when a stream of sparks hit them. There was no color change to blue or anything as I would expect if i heated up the steel too much- just a pit going through the edge.

 

[Frank Niro]

I believe the easiest way to avoid this is to dip your blade more often. The water on the blade with prevent this from happening.
Frank

 

[StuNY]

I believe the easiest way to avoid this is to dip your blade more often. The water on the blade with prevent this from happening.
Frank

Yes, that is what I ended up doing, dipping after every pass. Still thought it odd to see the little fires but basically put them out with each dip. Sounds like nothing unusual based on responses but seemed weird since i haven't seen this before.