By burned, do you mean melted - do the metals look like they have
"muddied" or a layer has partially disappeared?
Could be temperature in the kiln (have you verified with a separate
pyrometer?), could be different alloys (all materials from the same
supplier?), and could be some form of contamination. Without knowing
your cleaning process, it’s hard to say. Doing some cleaning
research, we noticed many things that seem to clean will also leave a
As far as it occurring on 50% of your billets, it may be on the other
two, but you might not be noticing it on the slices you’ve made.
Hmmnnn, lots here, but I think that it can be solved with more info
from you, and all of the helpful folks on Orchid.
Chris Ploof Studio