How do you interpret an iron-carbon phase diagram?
Types of Ferrous Alloys on the Phase Diagram The weight percentage scale on the X-axis of the iron carbon phase diagram goes from 0% up to 6.67% Carbon. Up to a maximum carbon content of 0.008% weight of Carbon, the metal is simply called iron or pure iron. It exists in the α-ferrite form at room temperature.
What is the iron-carbon phase diagram?
The Fe – C diagram (also called the iron – carbon phase or equilibrium diagram) is a graphic representation of the respective microstructure states of the alloy iron – carbon (Fe-C) depending on temperature and carbon content. To explain this diagram, an introduction about metal structures and pure iron must be done.
What is Curie temperature on iron carbon equilibrium diagram?
The A2, point is the Curie point when iron changes from the ferro- to the paramagnetic condition. This temperature is 769°C for pure iron, but no change in crystal structure is involved.
What are the limitations of a iron-carbon phase diagram?
10.9 Two limitations of the iron-iron carbide phase diagram are: 1) The nonequilibrium martensite phase does not appear on the diagram; and 2) The diagram provides no indication as to the time-temperature relationships for the formation of pearlite, bainite, and spheroidite, all of which are composed of the equilibrium …
What are the phases of steel?
There are only three phases involved in any steel—ferrite, carbide (cementite), and aus- tenite, whereas there are several structures or mixtures of structures.
Why does the iron-carbon phase diagram go only to 6.7 carbon?
The reason for iron-carbon phase diagram to go till 6.7% carbon is a matter of convention. In the phase diagram the abscissa extends only till 6.7% rather than 100%.
What are the limitations of a iron carbon phase diagram?
Why does the iron carbon phase diagram go only to 6.7 carbon?
How is an iron carbon phase diagram defined?
Iron-Carbon Phase Diagram Its defined as:- A map of the temperature at which different phase changes occur on very slow heating and cooling in relation to Carbon content. is Isothermal and continuous cooling transformation diagrams for plain carbon and alloy steels. Iron- Carbon diagram shows the type of alloys formed under very slow cooling.
What are the phases of iron-carbon alloys?
Phase compositions of the iron-carbon alloys at room temperature Hypoeutectoid steels (carbon content from 0 to 0.83%) consist of primary (proeutectoid) ferrite (according to the curve A3) and pearlite. Eutectoid steel (carbon content 0.83%) entirely consists of pearlite.
Is the carbon in iron an interstitial impurity?
The carbon in iron is an interstitial impurity. The alloy may form a face centred cubic (FCC) lattice or a body centred cubic (BCC) lattice. It will form a solid solution with α, γ, and δ phases of iron. The weight percentage scale on the X-axis of the iron carbon phase diagram goes from 0% up to 6.67% Carbon.
What is the magnetic transformation temperature of iron carbon?
Magnetic transformation temperature A2is the temperature below which α-ferrite is ferromagnetic. Phase compositions of the iron-carbon alloys at room temperature Hypoeutectoid steels (carbon content from 0 to 0.83%) consist of primary (proeutectoid) ferrite (according to the curve A3) and pearlite.