The PTC process
stirs the metal during solidification thus refines micro structure,
reduces defect ratio, improves quality and reduces production cost
dramatically.
PTC advantages for Lost Foam Casting
Defects ratio reduction from 20-35% to less than
5% - Foundry yield increase
Production cost reduction by 20%-25%
Surface roughness reduction by 40-60%
Microstructure refinement by 20-50%
Segregation reduction
Mechanical properties improvement
Shrinkage and porosity reduction by 80% (factor of 5 times)
As a result significant production cost
savings and product quality improvement is achieved.
The PTC treated sample has very low porosity level in
comparison to normal casting
Conventional Casting
Ptc Casting
The PTC process has been tested commercially by one of the
largest aluminum foundries for the production of cylinder heads and
engine blocks, for aluminum lost foam casting.
Using the PTC process to stir the molten metal during the
solidification significantly reduces the defect ratio from 25-35% to
less than 5% and casting productivity was increased.
The PTC process improves cast part quality, reduces shrinkage and
porosity and improves surface quality. The fine microstructure that
has been achieved by the stirring effect of the solidifying metal
improves dramatically the mechanical properties of the cast part.
Micro porosity inspection in lost foam casting of
cylinder head
Dendrite Arm Spacing (DAS) measurements from 3 cylinder heads
cast in lost foam
