We all know that 5 series of aluminum alloy material is more suitable for welding, but there are some difficulties, then 5083 aluminum bar manufacturers to introduce to you, 5083 aluminum bar welding characteristics and difficulties.

1.5083 Aluminum bar has good plasticity, high electrical conductivity and thermal conductivity. The 5083 aluminum bar oxidizes into alumina film, which produces inclusions in the weld seam, thereby destroying the continuity and uniformity of the metal and reducing its mechanical function and corrosion resistance.Chemical composition and mechanical function of common aluminum wires and substrates.

2.5083 Welding difficulties of aluminum bar

(1) Easy to oxidize.In the air, 5083 aluminum bars are simply oxidized to form a fine film of aluminum oxide, far beyond the melting point of aluminum and aluminum alloys.Alumina thin film appearance is easy to absorb water in the process of welding, it prevents us from metal fusion, easy to form a porosity, slag inclusion, not fusion and other shortcomings, resulting in the reduction of the main functions of different welding seams.

(2) Porosity that is easy to occur.When the main reason for the porosity of 5083 aluminum rods is hydrogen, as many liquid aluminum dissolve hydrogen and aluminum are almost insoluble solid hydrogen, so that when the solidification bath temperature cools rapidly, there is no time to weld the set of hydrogen escaping from the configured pores.Hydrogen pores are hard to avoid. It has been proved in practice that even if argon reaches 99.99% purity according to GB/T4842, there will be many fine pores when water content reaches 20ppm.When the relative humidity of air exceeds 80%, obvious porosity will appear in welding seam.

(3) Large thermal conductivity of 5083 aluminum bar (pure aluminum 0.538 CAL/cm.s.℃).Approximately 4 times stronger than steel, so when the rod is 5083, use more heat than welded steel.

The above is the introduction of the characteristics and difficulties of 5083 aluminum bar welding. If you need 5083 aluminum bar, please consult us.