Patent ID: 6228188
Filing Date: 2001-05-08
Classification: C21D

Abstract:
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.