Internal Combustion Engine Parts And Metals From Which it is manufactured.

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A metal decide the performance and limit of a machine. We
are often interested in finding which metal is used in manufacturing of an IC engine and why. In manufacturing of an engine we have to use those metals which can handle
the pressure and temperature of the engine and should be cheap in price. Today I am
going to tell you about the metals which is used in IC engine and there method of
manufacturing.

Cylinder block:
Cylinder is made by high grade cast iron because it is in
direct contact of combustion gases. Cast iron has high compressive strength to
handle the pressure and temperature. It is made by casting and usually cast in
one piece.

Cylinder head:
The main function of cylinder head is to seal the cylinder and it should be light in weight. So cylinder head is usually made by cast iron or aluminum. It
is made by casting or forging and usually in one piece.

Piston:
Piston is prime mover in engine so it should be light. It is in direct contact with combustion
temperature and pressure so it should has high strength to handle this
pressure. So generally piston is made by cast iron but sometime it is made by
aluminum alloy. Usually it is made by casting.

 Piston ring:

Piston ring is usually made by fine grain of cast iron which
has high elasticity and it is not affected by the working pressure. Sometime
piston rings are made by alloy spring steel. It is made by forging.

Connecting rod:
Connecting rod transmits the power to crankshaft. It should have high strength. So it is made
by alloy steel but in small engine it is made by aluminum to achieve lighter weight. It is made by
forging.

Inlet valve and Exhaust valve:
Inlet valve admits the air and fuel into the cylinder. It
is usually made by silicon chrome steel with about 3% carbon. It is made by
forging.
Exhaust valve discharge the exhaust gases. It is made by
austenitic steal. It is also made by forging.

Crankshaft:
Crankshaft converts the reciprocating motion of piston into
rotary motion. It should have high tensile strength. So the crankshaft made by
high tensile steel or sometime by cast iron. It is usually made by forging.

Piston Pin:
Piston pin is made by hardened steel so it can support and
allow to connecting rod to swivel. It is usually made by forging.

Engine bearing:
Engine bearing should have lubricant property and strength
to withstand in moving load. So its half is made of steel or bronze back to
which a lining of relatively soft bearing material is applied.

Image source : http://dir.indiamart.com/indianexporters/au_engin.html

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Pankaj Mishra

Pankaj Mishra is a blogger by passion and Mechanical Engineer by profession. He has completed his B.Tech degree in mechanical engineering in the year 2015. He loves to share his knowledge and help others.

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