Cast Iron Piston Made In China
The piston is a key part of engine. It
consists of piston rings, piston pin, and connecting rod. The shapes
of pistons include disc shaped and cylindrical.
The primary mission of piston is passed the pressure of combustion
gases to the crankshaft. Make the crankshaft rotating and output
The types of pistons include diesel piston, gasoline car piston,
generator piston, farm machinery piston and general-purpose piston.
Because pistons working in the high speed, high pressure and high
temperature of the hostile environment, so the piston must have
enough strength and stiffness, expansion coefficient is smaller,
weight is lighter, wearing resistance, corrosion resistance and
thermal conductivity should be better.
The materials of pistons
The materials of pistons include
cast iron, cast steel,
and aluminum alloy, of which cast iron is the most common materials.
The castability of cast iron is good and it has enough strength and
stiffness, expansion coefficient is smaller, and good wearing
resistance and corrosion resistance.
Moreover, the cost of cast iron is lower, but its weight is heavy,
thermal conductivity is smaller, heat absorptivity is about 30%
higher than aluminum alloy.
The weight of aluminum alloy is lighter, thermal conductivity is
bigger, it has quick heat dissipation, but its strength and wearing
resistance are worse, expansion coefficient is bigger, easy for
expands and jammed inside in the cylinders.
The production processes of pistons are usually included casting and
As for casting process to produce piston, it has good wear
resistance, corrosion resistance and life time is long. Casting
process is fitted for common engine pistons.
As for forging process to produce piston, it has good strength and
stiffness. Forging process if fitted for high-performance engines