Semi-solid continuous casting–extrusion of AA6201 feed rods

High conductivity AA6201 feed rods with high tensile strength can be produced by a method called the semi-solid continuous casting–extrusion and on-line solution process (CCES). The effects of artificial aging and the combination of the artificial aging and cold drawing on the microstructures and properties of feed rods and finished wires were respectively investigated. Results show that the microstructures of feed rods consist of refined, equiaxed grains, with the hardening phases distributed in the Al-matrix at high density. The tensile strength, elongation, and electric conductivity of ∅ 4.4 mm feed rods subjected to the artificial aging were 300 MPa, 8.9%, and 55.0% IACS, respectively, and those of ∅ 3 mm finished wire subjected to the artificial aging and cold drawing (AACD) were 368 MPa, 4.2%, and 54.46% IACS. The properties of the ∅ 3 mm finished wire produced with AACD are much better than those characteristics of wire produced by the conventional process (295–300 MPa, 3.0–3.5%, and 52.5–53.0% IACS).