Ultra-low carbon steel wire rod for ladle steel wire and production process thereof

The invention provides an ultra-low carbon steel wire rod for a ladle steel wire and a production process thereof, and belongs to the technical field of wire rod production. The tensile strength of the ultra-low carbon steel wire rod is smaller than or equal to 320 MPa, and the electric conductivity is larger than or equal to 16 percent. The ultra-low carbon steel wire rod comprises a metal matrix, and a FeO layer and a Fe3O4 layer which are sequentially coated on the surface of the metal matrix from inside to outside. The metal matrix comprises the following components in percentage by mass:less than or equal to 0.01 percent of C, less than or equal to 0.005 percent of Si, less than or equal to 0.1 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.01 percent of S, less than or equal to 0.01 percent of Cr, less than or equal to 0.01 percent of Ni, less than or equal to 0.01 percent of Mo and the balance Fe and inevitable impurities. The thickness ratio of the FeO layer to the Fe