Hongduk Industrial Co., Ltd.

Trefil Arbed Korea Co. Ltd

Pyeong Yeol Park

Dong Kil Lee

Sang Ho Kim

Hong Ki Kim

Do Hun Kim

Ok Shil Park

Gi Hwan Kim

A steel cord for tire belt ply reinforcement includes a cord formed by periodically twisting n wires, wherein the n wires are compressed by rolling, and at least one of the n wires is compressed into a non-circular shape, when n is an odd number, a cross-section of one wire from among the n wires is circular due to rolling, and cross-sections of n−1 wires from among the n wires are non-circular, and when n is an even number, cross-sections of two wires from among the n wires are circular due to rolling, and cross-sections of n−2 wires from among the n wires are non-circular due to rolling.

Steel cord for tire belt ply reinforcement

Provided are a steel cord and a single steel wire having excellent straightness quality for reinforcing tire and a method of manufacturing the steel cord and single steel wire. The steel cord and the single steel wire include a wire undergoing through a drawing process, a heating process performed in a state in which tension is applied to the wire, and a cooling process; and a winding portion on which the wire is wound, the winding portion having a diameter greater than a diameter of the wire, wherein, when an end of the wire that has been wound on the winding portion for six months to one year is fixed on a point and the wire is pulled down vertically to 400 mm, a distance between a first axis that is perpendicular to the point and an opposite end of the wire is 30 mm or less. The method of manufacturing the steel cord and single steel wire having excellent straightness quality for reinforcing tire includes: a wire preparing process, a heating process, a cooling process, and a winding process.

Steel cord and single steel wire having excellent straightness quality for reinforcing tire and manufacturing method thereof

The steel wire for the steel cord of the present invention includes a plating layer of Cu-M-Zn (M is one or two elements of Co, Ni, Cr, Mo, Al, In, or Sn) and has a concentration gradient in which the M content ratio in a region from the surface to &#xbc; of the plating layer is 40% or more compared with the M content ratio in the entire region of the plating layer, and the steel cord for rubber reinforcement is obtained by a manufacturing method comprising: performing sequential plating on a surface of a steel wire in the order of Cu&#x2192;M&#x2192;Zn; performing a primary diffusion, for concentration gradient of M, by subjecting the sequentially plated steel wire to high-frequency induction heating using 1-500 MHz; and performing a secondary diffusion, following the primary diffusion, by medium-frequency induction heating using 10-500 KHz.

Steel cord for rubber enhancement and manufacturing method therefor

The present disclosure relates to an electroplated bead wire having excellent oxidation resistance, of which oxidation resistance and aging adhesive strength with tire rubber are improved by forming a copper- and cobalt-plated layer by electroplating. The electroplated bead wire includes the plated layer formed through electroplating, wherein the plated layer contains 40 to 99 wt % of copper and 1 to 40 wt % of cobalt.

Growing community of inventors

Pohang-si, South Korea

Pyeong Yeol Park