Oil
tempering process is the term commonly used in the wire industry to designate
a type of wire which receives a hardening and tempering treatment after it has
been drawn to the desired size.
The term is in fact incorrect as the process consists of a
heating above the critical temperature, one oil quenching and one reheating
or tempering (usually in lead) to relieve the quench hardness obtained. Nowhere
in the sequence is oil to be found as the tempering medium.
This type of wire is recognized by the springmakers because
of its combination of excellent elastic properties and good toughness.
In that field, FIB has developed a concept of line where both
the stability of the temperature of the equipments is taken into account as
the cooling efficiency of the oil quenching bath. Our design of lines has successfully
treated wire size from 0,3 mm up to 25 mm.
In a world where the use of lead is more and more avoided,
the fluidised bed has probably a place to be considered in that process.
OIL
TEMPERED WIRE
Oil
tempering process is the term commonly used in the wire industry to designate
a type of wire which receives a hardening and tempering treatment after it has
been drawn to the desired size.
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