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The thermal analysis is a quick,
reliable, & low cost application method enabling
quality & melting process control of cast
iron. From iron/carbon state diagram the thermal
analysis gives direct information about solidification
of cast iron. It allows analysis of carbon equivalent
(%CE), Carbon (%C), Silicon (%Si) in iron melts
like Grey cast iron, Ductile iron and Malleable
iron.
Principal of Operation: Thermal
Analysis is the interpretation of cooling curve
of liquid iron sample. First arrest point, the
liquidus is a temperature level is directly related
to Carbon Equivalent. CE = %C + %Si/3 + %P/3.
Second arrest point, the solidus
temperature, when referred with liquidus, allows
the total carbon content prediction. For this;
metal must solidify white which is achieved by
Tellurium This specially designed Tellurium &
other ingredient minimises the influence of entrapped
particles, gases and particularly additions used
in cupola produced iron. Our smart carbon cups
are tellurium coated sensors with "k"
type thermocouple can be used for Carbon Equivalent,
% Carbon, % silicon in grey, malleable & base
metal of ductile iron. Carbon cups are available
to cover entire range of thermal analysis i.e.
% Carbon + % Silicon/9 = 4.3.
Traditional thermal analysis
uses tellurium-coated cups. Carbon precipitates
as Fe3C. Easy to detect temperature arrests and
to calculate CE,% C and %Si.
Smart Grey Cup are non -tellurium
test cups, specially designed to get information
how carbon is precipitated into graphite. We get
cooling curve of grey sample, when carbon is allowed
to solidify as graphite. By using this cooling
curve we can Prediction of Tensile strength, Brinell
Hardness & type of microstructure of unalloyed
cast iron, Measurement of Eutectic Cell Count
& Inoculation Deciding Factor for cast iron,
Prediction of %Nodularity, Nodule Count, Shrinkage
Index
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SMART LAB is a microprocessor
based instrument for quick thermal analysis of
the iron melt before it is poured; this makes
it possible to correct the melt for optimization
& ensures higher quality when pouring. It
is specially engineered to suit the foundry environment.
SMART LAB provides calculations
of Carbon content (%C), Carbon Equivalent (CE),
& Silicon content (%Si) for quick analysis
of cast iron. This is an automatic analysing instrument
that is used with SMART CUP & SMART TIP for
both thermal analysis & immersion temperature
measurement. It consists of a special electronic
hardware and SMART LOGIC software which automatically
corrects errors introduced due to de-rating/ ageing
effect of electronic components, ensuring long-term
accuracy of measurement.
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