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An English version of Diag phase fer carbone.png, with grey tones cleaned up and some modification of text. Adaptation by Polyparadigm. Description of original image follows:
Iron-carbon phase diagram under atmospheric pressure
This diagram is limited by pure iron on the left and by iron carbide on the right. The mains phases are:
- α iron: ferrite, ferritic steel
- γ iron: austenite, austenitic steel
- iron carbide: cementite, Fe3C.
We can see an eutectic and an eutectoid; these phases crystallise as a stacking of fine strips of pure phases (iron and cementite) in case of the eutectoid, or a pure iron containing small balls of cementite for the eutectic. Although it is heterogeneous, these phases behave like homogeneous pure bodies.
Steel is between 0 and 2 mass percent of carbon. Cast iron is between 1,7 and 6,67%.
Author : Christophe Dang Ngoc Chan
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