The copper cladding aluminum composite rod with 12 mm in outer diameter and 8 mm in inner diameter was prepared by continuous casting with nitrogen pressure and core-filling.The composite wire with 0.6 mm in diameter was manufactured by multi-passes drawing without annealing.Copper cladding aluminum wire prepared has smooth surface with absence of dent and cracks as well as other defects

meanwhile

the ratio of copper and aluminum keeps stable at different stages of processing.The drawn composite wires were annealed at different temperatures for 1 h.The results show that the satisfied comprehensive performances can be obtained at 450 ℃

where tensile strength

elongation and direct current resistivity reach 208.43 MPa

13.44% and 2.454×10

-8

Ω·m

respectively

meeting the requirement of electronic industry standard.