DEFORMED STEEL WIRE WITH HEAT TREATMENT, AND ITS PRODUCING METHOD AND APPARATUS

摘要

PROBLEM TO BE SOLVED: To produce a deformed steel wire with a heat treatment, which is subjected to quench-heat treatment without a small bending, in one process. SOLUTION: A heating means 6 for rolling, a four-way type roll rolling mill 7 and a quenching and cooling means 8 are adjacently disposed in a tandem, and a blank W1 for wire rod is rapidly heated to the rolling temperature with a heating means 6 and rolled into the deformed steel wire W2 having a prescribed cross section with the four-way type roll rolling mill 7 and rapidly cooled with the quenching and cooling means 8 just after rolling while loading tension to the wire rod W2 with pinch rolls 9 to perform the worked quenching. In this case, since the pinch rolls 9 are driven with a motor 9a with a torque converter, the variation of the torque is little and the variation of the size in the deformed steel wire is not caused. A heating coil 10 for tempering is arranged in the tandem at the rear part of the quenching and cooling means to perform a continuous tempering.