Appeal No. 1996-3859
Application No. 08/278,910
that austentite is transformed to pearlite and the formation
of
martensite and bainite is avoided. Claims 19 and 36 are
illustrative and read as follows:
19. A process of manufacturing a pearlitic steel wire
and avoiding formation of martensite and bainite in steel wire
having a diameter which is less than 2.8 mm, comprising the
steps of:
(a) heating a steel wire having a diameter which is less
than 2.8 mm;
(b) cooling the steel wire from step (a) during a pre-
transformation stage, including:
(1) stable film boiling the steel wire
by guiding the steel wire into a water bath for a
first water cooling period;
(2) cooling the steel wire in air for a first air
cooling period;
(c) further cooling the steel wire from step (b) during
a transformation stage, including:
(1) stable film boiling the steel wire by guiding
the steel wire through a water bath for a second
water cooling period; and
(2) air cooling the steel wire in air for a second
air cooling period.
36. A process of manufacturing a pearlitic steel wire and
avoiding formation of martensite and bainite in steel wire
having a diameter which is less than 1.8 mm, comprising the
steps of:
(a) heating a steel wire having a diameter which is less
than 1.8 mm;
2
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