STEEL CORD FOR REINFORCING RUBBER AND METHOD FOR THE SAME

摘要

The present invention relates to a steel reinforcing steel cord made of a three- or four-membered alloy plating layer of steel wire for steel cords. The plating layer of the steel wire for steel cord of the present invention is made of Cu-M-Zn (M is one or two elements of Co, Ni, Cr, Mo, Al, In, or Sn), and M up to one quarter from the surface of the plating layer. The content ratio has a concentration gradient of 40% or more relative to the content ratio in the entire plating layer, and sequentially plating the surface of the steel wire in the order of Cu → M → Zn; A first diffusion step of inductively heating the sequentially plated steel wire at 1 to 500 MHz for a concentration gradient of M; After the first diffusion, it is obtained through a manufacturing method comprising a second diffusion step of induction heating at 10 to 500 KHz.