Cast iron which is mainly contain carbon and iron as like as
a steel. In a cast iron amount of carbon is 2 to 6.67 %. In iron-iron carbide
schematic figure or diagram we find carbon amount is larger than which is
needed to eutectic temperature. When in a cast irons carbon is used more these
types of cast iron is brittle, for this reason when cast iron produce in
commercially carbon used is a less amount such as 2 to 4 %. For rigidity of
cast iron it’s malleable is low and it
can not be easily reeled at room temperature
and easily one from to another from for uses various purpose. For giving
various shape of cast irons people use casting process which melt cast iron at high temperature. And finally for smooth surface it machined. Cast iron is cheap and availability is high,
one can do properly heat treatment,
control is better in foundry shop, alloy can produce properly. In metallurgy cast iron classified of four
types in physically such as
1.
After casting heat treatment
2.
By the name of carbon kernel
3.
Alloy and ordure kernel
4.
The cooling rate during and after freezing.
Physical
properties of a cast iron classification are given bellow:
Alloy: By adding various element of iron which is used for
various purpose for get more facilities it is called Alloy cast iron
.
Nubble or nodular cast iron:
In this types of cast iron carbon added additionally as spheroid where
carbon particle gives regular shape such as circular or which is wanted by one.
White cast iron: White cast iron is mainly used as a formed
from cementite.
Gray cast iron: Grey cast iron which produced from of
graphite flakes with carbon unlinked.
Chilled cast iron: A grey iron interior and white cast iron
liked is called chilled cast iron.
Malleable cast iron: Malleable cast iron produced from white
cast iron by proper heat treatment and also formed of snatch round grain.
Image source: practicalmaintenance
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