WIRE ROD FOR FINE STEEL WIRE CORD, STEEL WIRE, CORD, AND MANUFACTURING METHOD THEREFOR

The present invention belongs to the technical field of wire rod production methods, and specifically relates to a wire rod for a fine steel wire cord, a steel wire, a cord, and a manufacturing method therefor. The wire rod has the following chemical composition in percent by mass: C: 0.79-0.84%; Si: 0.15-0.30%; Mn: 0.45-0.55%; P ≤ 0.015%; S: 0.0030-0.010%; full oxygen: 0.0008-0.0022%; Als: 0.0002-0.0012%; Mg: 0.0002-0.0012%; Nb: 0.0003-0.0009%; Mo: 0.0003-0.0012%; and the remainder being Fe and inevitable impurities. By means of the chemical composition and production process design, the present invention achieves a uniform hardness distribution throughout the cross sections of the wire rod and steel wire, thereby satisfying the stranding performance requirements of a user when machining fine steel wire cord for a wire rod. La présente invention appartient au domaine technique des procédés de production de fil-machine, et concerne spécifiquement un fil-machine pour un cordon de fil d'acier fin, un fil d'acie