The design idea of light-weighting with medium and high carbon components and low density elements Si and Al was adopted

and the tested high-strength armored steel was melted by a 50 kg vacuum induction. At the same time

the metallographic microstructure and pearlite lamellar spacing and mechanical property of the 06 mm wire rod were tested by means of metallographic microscope

SEM scanning electron microscopy and mechanical property testing equipment

The results show that the microstructure of the wire rod after isothermal heat treatment(600 °C insulation for 2 hours) is ferrite and pearlite mixed microstructure. The pearlite lamellar spacing is (126 ±5) nm

the yield strength is greater than 1183 MPa

the tensile strength is greater than 1 425 MPa and the elongation is greater than 10%. The mechanical properties of test steels meet the technical requirements of armoured steel for electric cables.