High carbon steal annealing/tempering
This topic starts with a question from something I just recently did. I got a high carbon steel marking knife (its a Hock tool) and when i got it, it was bent and i heated it up to a nice red color, let it cool, tried bending it, and broke the tip off so i sharpened it back to a point and heated it up until it was no longer magnetic and heated it at 450F for about an hour. After doing this and checking some charts I was expecting a golden/brown color but instead got a blue color throughout most of it. So do i need to redo this or is it harder than i would expect from a blue colored steel?
So I'm sure there are plenty of resources out there for figuring all this out but i was hoping this could be a centralized area for anyone to get all the information they need on this topic.
- what are some tips/tricks on annealing/heat treating/tempering iron, steel, and high carbon steels?
- is there a difference between the three (annealing, heat treating, and temper)?
- what is the difference (if there is one)?
- what should someone expect from doing something like this?
- what would each color be useful for (which would be best for a drill bit or which would be best for woodworking tools etc.)?
- any tricks of the trade?
- any personal tricks that you wont find anywhere else?
- anything else to add?
if i remember to do so i will post this blue marking knife that i'm talking about.