Microstructure and Properties of Copper Clad Q195 Steel Composite Wire

The copper clad Q195 steel composite wire was prepared by composite casting-swaging method, and the mechanical properties, microstructure and electric properties were studied by tensile testing, microstructure observing and resistivity testing. The results show that the serrated bonding surface between copper and steel was obtain after casting, the interface was fairly clear and microstructure was fairly large and had not intermediate phase was obtained, and the microstructure was fine after swaging. The tensile strength and resistivity of composite wires prepared by copper clad steel composite bar with steel core diameter of 2, 3.4 and 4 mm were 260.63, 368.83, 419.12 MPa and 1.981 ×10-6, 1.976 ×10-6, 2.035 ×10-6Ω·cm, respectively. The tensile strength of the composite wire with a higher proportion of steel core was closer to that of the pure steel core. The tensile fracture of the copper clad steel composite wire had amounts of dimples, and its fracture mode was typical ductile fracture.