Blade possibly overheated? What to do?

[fateofone]

So recently, I cut an old piece of spring steel, annealed it and have gotten close to the hardening process. Well, it hit me that when I first annealed the metal, it flaked off and added pits (I've since grinded those away). So to avoid that from happening again when I harden it, I looked up what to do.

To my surprise, it seems I may have overheated the steel, and I'm quite worried now because I'm almost done. I haven't noticed any issues while grinding etc. The steel should be 5160. Am I okay or should I do something to fix it? Is it unfixable?? What?

 

[fateofone]

Here are a couple images of the knife where it's at now to assess what you think. They are quite high quality.

Here is an older image that shows before I did too much grinding (the pitting that isn't black is from an angle grinder)

 

[me2]

How did you anneal it? How do you intend to harden it? What on earth is the knife meant to do?