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Materials
/ GJL
Cast iron materials
with lamellar graphite (GJL) have outstanding casting
properties, making them suitable for the highly
economic production of components. In addition,
they also provide excellent damping performance
compared to other materials and are therefore the
ideal material for gear housings, cylinder blocks,
machine foundations and other similar components.
These materials are also very good for mechanical
working.
Cast iron with lamellar graphite contains graphite
in the form of a three-dimensional structure which
is similar to that of a head of lettuce. In a metallographic
specimen the graphite has the appearance of a lamellar.
Since graphite is very good at transferring pressure
forces but not tensile forces, the “lamellars”
have the effect of internal notches and limit the
strength and ductility of the materials. The tensile
strength of cast iron with lamellar graphite is
therefore largely dependent on the size, shape and
distribution of the graphite. It falls between 100
MPa and 350 MPa. Under pressure loads, however,
these materials can withstand much greater stress
than under tensile loads.
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