Kiln thermal cycling and using ATP-641

Brian Avila

Brian Avila

Joined
Jan 2, 2011
Messages
1,286
I posted earlier and found out that I was having lots of scale forming on my thermal cycling. In order to make my life easier and to help with decarb. I got some ATP-641.

Reading the instructions it says it "spells on cooling", meaning it breaks up and falls off after cooling, ( I had to look up spalls ). This means I will have to reapply the coating every thermal cycle?

Any one use this stuff and have any good suggestions on a good process? I was hoping not having to reapply every time I place the blades in the kiln.
 
Yes, it will flake off as it cools. If you have some foil you can do all your thermal cycling in foil, remove the foil, apply the ATP-641, then harden as normal.
 
So what I do is place some knives in my kiln and then heat them up, let them hit the temp, take them out and hang them from the drilled holes on some hangers.

I wouldn't be able to hang them if I used foil plus I would have to get high temp foil. So I guess I will just use the ATP every temp cycle.
 
No, let the kiln come up to the desired temp. and eqaulize and then put your blades in. I don't hang them while in the foil. I have a steel plate with 3/16 holes drilled in one end with approx. 3/8" between the holes. I put a piece of 3/16" pin stock in each hole and stand the blades on their spine between the pins. If you don't use foil you will have to reapply the ATP after every heat.
 
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