Ultra-low carbon steel wire rod for electric conduction and production method thereof

Abstract

The invention provides an ultra-low carbon steel wire rod for electric conduction and a production method thereof. The ultra-low carbon steel wire rod for electric conduction comprises the following chemical compositions: 0.002-0.005% of C, 0.004-0.010% of Si, 0.05-0.15% of Mn, less than or equal to 0.015% of P, less than or equal to 0.010% of S, 0.0050-0.0080% of total oxygen, and less than or equal to 0.0050% of total aluminum. The carbon content of smelted steel tapped from a converter is less than or equal to 0.040%, and the oxygen content of molten steel is 0.060-0.070%; natural decarburization is performed for 5-8 minutes in the first stage of RH refining; in the second stage of RH refining, after the carbon content is reduced to below 0.0030%, oxygen blowing is performed for 15-20 minutes, and a low-carbon or carbon-free steel ladle is adopted for smelting; the superheat degree of molten steel of a continuous casting tundish is less than or equal to 30 DEG C, the electromagnetic stirring current is greater than or equal to 400A, and the pulling rate is 0.5-0.7 m / min; the temperature of an entry double-module is 880-900 DEG C, the spinning temperature is 900-920 DEG C, the roller-bed speed is 0.2-0.4 m / s, and fans are completely closed. The electric conductivity of the wire rod disclosed by the invention is greater than or equal to 15%, the tensile strength is less than or equal to 300 MPa, and the area reduction index is greater than or equal to 80%, and the wire rod can partially replace copper conducting materials, thereby reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an ultra-low carbon steel wire rod for electric conduction and a production method thereof. Background technique [0002] With the rapid development of the national economy, the requirements and consumption of conductive materials continue to increase. The traditional copper conductive material has good conductivity, but its high cost limits its wide application. The electrical conductivity of the steel material increases with the reduction of the impurity content in the steel, and the low carbon and low silicon content of the ultra-low carbon steel lays the foundation for improving the electrical conductivity of the steel. The conductive steel wire made of ultra-low carbon steel conductive wire can partially replace the copper conductive material, reduce production costs, and has a huge market application prospect. [0003] Patent application number 200910117766...

AI Technical Summary

Problems solved by technology

The existing low-carbon steel wire rod C≤0.010%, the electrical conductivity can only reach 6-8%, and the ultra-low carbon steel wire rod C≤0.005%, the electrical conductivity can only reach 10-12%, which cannot meet the partial replacement conductivity Requirements for copper conductive materials with a rate ≥ 15%

Images