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Esterer Gießerei - Perlite


Perlite is the name of the crystalline mixture of ferrite and iron carbide Fe3C, also known as cementite. It is a flake-like structure constituent of steel.

Flake-like means in this case, that cementite is enclosed in ferrite in the form of flakes. This is why we also talk about striped perlite. Through hardening we can gain a spherical form of cementite. Thus, grainy perlite develops.

The crystalline mixture perlite is an eutektoide, which transforms itself at a temperature of over 726 degrees Celsius completely into austenite.


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