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Metallurgy of Steel for Bladesmiths- Dr. Verhoeven
#51
Mr. Mark you are welcome. It is my pleasure to take part in the discussion here. In metallurgy I am a beginner, a self-made man and so reading the explanations provided by Mr. Me2 is for me also important. My physical background allows me deeper insight in some aspects but I have to deepen my general overview.

The simple arithmetic used by calculating the weight % of Carbon in cementite was only an example, how some figures important for understanding Fe-C diagram can be calculated using the periodic table of elements.

My wife is a GP, but she has a good background in chemistry also. When she saw that we are discussing iron carbide, she told me that it will not be very stable compound of iron.

I was quite surprised, because it is true and her statement was based only on general assumptions a knowledge of the periodic system of elements.

Jan


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#52
It is true that iron carbide is technically not the stable phase. However, at least in steels, it takes high temperatures and long times to breakdown into graphite and ferrite. The time is so long that for practical purposes, it is stable.
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