An improved method of spheroidize annealing of ypereutectoid steel wires with reduced cycle time

摘要

The invention relates to an improved method of spheroidize annealing of hypereutectoid steel wires with reduced cycle time, comprising the steps of providing at least a standard length of hypereutectoid steel wire having about 0.6 to 0.8% of carbon in a heating furnace; directly heating the steel wire in the furnace to a temperature range of about 675°C by maintaining a heating rate substantially equal to 1.4°C/minute, the total heating time being five hours; soaking the heated steel wire within the furnace at the temperature of about 675°C for a time period of around 6.0 hours; and switching off the furnace.