Ferrite is a solid carbon interstitial solution in a cubic network centered on the iron body . It admits up to 0.021% C in solution at the eutectoid temperature . It is the softest constituent of steel .
Summary
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- 1 resistance
- 2 The morphology and granular structure of ferrite
- 3 Equiaxial morphology
- 4 External links
Resistance
Its resistance is 28 Kg / mm2 (2.7 MPa). It is ferromagnetic and its Curie temperature is 768ºC. From this temperature up to 910ºC its behavior is paramagnetic , reason why another phase was mistakenly and anciently believed to be called beta iron .
The morphology and granular structure of ferrite
It is very varied and can find up to 24 descriptive terms. However, there are two morphologies that should be highlighted (Fig. 1): Equiaxial morphology and (Fig. 2): Widmanstätten structure .
Equiaxial morphology
it corresponds to polygonal grains with approximately equal axes, which are sometimes attacked differently depending on their crystallographic orientation with respect to the observation surface. In the Widmanstätten structure, rapid cooling from high temperatures forces ferrite growth in certain preferential directions, resulting in elongated grains in these directions than the previous austenite grain.
