Method for manufacturing aluminum alloy welding wire and aluminum alloy welding wire

Abstract

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.