Copper-clad aluminum alloy wire and high-speed wire drawing process thereof

Abstract

The invention discloses a copper-clad aluminum alloy wire and a high-speed wire drawing process thereof, and relates to the technical field of metal material processing. The aluminum alloy material is firstly subjected to cryogenic treatment and ball-milling treatment, grains are refined, so that the grain boundary area is increased, the deformation resistance is enhanced, and the strength is improved; and during subzero treatment, high-energy ball milling is matched, so that other nano metal particles are converted into real solid solution from sub-solid solution, and the strength and the overall stability of the aluminum alloy are improved. According to the method, high-temperature treatment is carried out after copper cladding welding, a solute boundary layer is thick, solute components are fully diffused, and therefore a welding part is more stable and not prone to cracking; and meanwhile, in the cooling process after high-temperature treatment, ethanol is used for reduction, so that oxides generated in a welding seam and bubbles generated by metallurgical reaction at high temperature are reduced, and various properties of the copper-clad aluminum alloy wire are further improved while the conductivity is ensured. The prepared copper-clad aluminum alloy wire has the effect of high mechanical property.