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Summary
DescriptionIron carbon phase diagram.svg
English: Iron–carbon phase diagram, at atmospheric pressure
This diagram is limited by pure iron on the left and by iron carbide on the right. The mains phases are:
iron: ferrite, ferritic steel
iron: austenite, austenitic steel
iron carbide: cementite, Fe3C.
It shows a eutectic and a 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 2.06 mass percent of carbon. Cast iron is between 2.06 and 6.67%.
Black lines indicate the metastable Fe/Fe3Cphase, red is the stable Fe/Carbon phase
This diagram is for illustrative purposes only, and is not thermodynamically accurate.
Español: Diagrama de fases hierro-carbono a presión atmosférica
Este diagrama está delimitado por hierro puro a la izquierda y carburo de hierro a la derecha. Las fases principales son:
Hierro: ferrita, acero ferrítico
Hierro: austenita, acero austenítico
Carburo de hierro: cementita, Fe₃C.
Se muestran un eutéctico y un eutectoide; estas fases cristalizan como un apilamiento de finas tiras de fases puras (hierro y cementita) en el caso del eutectoide, o un hierro puro con pequeñas esferas de cementita en el caso del eutéctico. Aunque heterogéneo, estas fases se comportan como cuerpos puros homogéneos.
El acero contiene entre 0 y 2,06 % en masa de carbono. El hierro fundido contiene entre 2,06 y 6,67 %.
Las líneas negras indican la fase metaestable Fe/Fe₃C; las rojas, la fase estable Fe/Carbono.
Este diagrama es solo para fines ilustrativos y no es termodinámicamente preciso.
Date
Source
Own work
Läpple, Volker - Wärmebehandlung des Stahls Grundlagen, Verfahren und Werkstoffe 8. Auflage, Seite 55ff.
Weißbach, Wolfgang - Werkstofkunde Strukturen, Eigenschaften, Prüfung 17. Auflage, Seite 76ff.
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