This application provides a method for preparing aluminum
alloy welding wire with high production efficiency, low cost, and good product performance, as well as the aluminum
alloy welding wire itself. The method for preparing the aluminum
alloy welding wire includes the following steps: aluminum
molten metal melting, furnace refining, ultrasonic degassing, online
filtration,
continuous casting and
extrusion, rod drawing, intermediate annealing, and finished product drawing. The
continuous casting and
extrusion process directly obtains the welding
wire rod blank from the molten aluminum, resulting in a simple process and high yield. The aluminum alloy structure undergoes severe shear deformation and is fully broken, resulting in a dense welding
wire rod blank with sufficient
dynamic recrystallization, exhibiting good drawability. Only one intermediate annealing step is required to draw it to the finished product size, resulting in high production efficiency and low cost. The aluminum alloy welding wire is composed of the following components by
mass percentage: Zn 4.5-5.2%, Mg 1.2-1.8%, Cu 1.5-2.0%, Mn 0.2-0.5%, Cr 0.1-0.3%, Zr 0.05-0.2%, Ce 0.05-0.15%, Y 0.05-0.15%, Si≤0.05%, Fe≤0.08%, with the remainder being Al and unavoidable impurities.