Definite Chill Iron Rolls (Clear
Chill Iron Rolls)
The working
surface of
Clear Chill
Rolls shows
the white
graphite free
structure
consisting
of eutectic
carbide and
transformed
austentite.
This gives
a hard layer
which confers
good resistance
to wear. The
core and necks
exhibit a
tough grey
structure,
and the iron
of the transition
zone is mottled.
Compared
to grey iron,
white chill
iron is less
soft, strong
and incapable
of withstanding
high dynamic
stresses, but
owing to its
greater hardness,
has better wear-resistance,
and has high
compressive
strength. It
retains a fair
proportion of
its strength
at elevated
temperature,
for example,
in hot rolling
.
These
make excellent
work rolls for
two, three and
four-high mills,
turning out
of high grade
ferrous and
non-ferrous
sheet and strip
or section.
High Alloy Clear
Chill Rolls
have proved
well suited
for the finishing
stand of rod
and light section
mills, for continuous
small and medium
hot strip mills,
and for strip
mills of older
design.
