Ultra-low carbon wire rod with high conductivity and production method of wire rod

Abstract

The invention discloses an ultra-low carbon wire rod with high conductivity and a production method of the wire rod. The ultra-low carbon wire rod comprises main chemical components including, by mass percent, not larger than 0.012% of C, not larger than 0.012% of Si, not larger than 0.08% of Mn, not larger than 0.015% of P, not larger than 0.010% of S, not larger than 0.080% of Sieq, and the balance iron and inevitable impurities. The production method comprises smelting, casting, wire rolling and wire cooling. The specification of the ultra-low carbon wire rod is phi5.5 to 9.0mm, the conductivity is larger than or equal to 16.3%, and due to the high conductivity, the good pulling and drawing and good comprehensive mechanics property of the wire rod, the thickness of the copper layer coated on the surface of the wire during downstream customer machining can be effectively reduced, and therefore the production cost is reduced.

Description

technical field

[0001] The invention belongs to the technical field of iron and steel smelting and high-speed wire rolling, and relates to an ultra-low-carbon wire rod with high electrical conductivity and a production method thereof. Background technique

[0002] Hot-rolled wire rod with certain conductivity is widely used in copper-clad steel wire, coaxial cable, electronic components and other fields due to its good conductivity and mechanical properties, after drawing, heat treatment, copper plating and other processing processes. However, due to cost considerations, downstream customers such as copper-clad steel wire, coaxial cables, and electronic components require that the conductivity value of the hot-rolled wire rod used is ≥16.3%, and the control level is stable.

[0003] Patent 201110409858.X discloses a "low-resistance low-carbon steel and its preparation method and its use in the preparation of copper-clad steel wire", the chemical composition of the low-carbon...