Graphite

Graphite morphology is one of structures that we find in cast iron. Characteristic from graphite that we know is very hard. It because of graphite is one of the carbide. From the literature known that graphite has….. A number of Graphite will determin properties of cast iron. We know there are many morphologies of graphite, they are flake/lamellar, Spheroidal, coral, vermicular, chunky etc.

Spheroidal graphite pictures:

    

Characteristic from spheroidal graphite has advantages and makes cast iron has good properties such as low melting grade, good fluid and casting, good cutting strength, good hardenability, high resistance etc. The causes of this characteristic is Spheroidal graphite as a carbide it has good hardenability but the shape is different with other graphite, lamellar graphite for examplary that has notch effect from the shape become central of tension and usually to be the origin of failure defect especially from outside load.

Vermicular Graphite

   

Vemicular graphite usually known as Compacted graphite cast iron or CG Iron. The microstructure of this graphite like worm and stubby form not as long as lamellar graphite. Shape or microstructure and mechanical properties from vermicular graphite are between lamellar and spheroidal graphite. So that the application from this material is adapting with this properties. Example product use CG iron is exhaust manifolds and any of other automotive parts.