Laser welding method applicable to aluminum alloy
A technology of laser welding and aluminum alloy, which is applied in the direction of laser welding equipment, welding equipment, welding/welding/cutting items, etc., can solve problems such as welding thermal cracks, weld pores, joint softening, etc., and achieve high strength and good welds organization effect
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Embodiment 1
[0014] 7021 aluminum alloy (Al-5.5Zn-1.4Mg aluminum alloy) (should be Zn of 5.5% by weight, Mg of 1.4% by weight, and the rest is Al) adopts the laser welding method of the present invention, and the specific process is that the laser power is 2200w, The welding speed is 1m / min, the defocus is 0, the shielding gas is high-purity argon, and the shielding gas flow rate is 16L / min. The results show that if figure 1 As shown, after the alloy is laser welded, the weld structure is uniform, without welding pores, structure boundaries and obvious coarse-grained bands.
Embodiment 2
[0016] To 7029 aluminum alloy (Al-4.6Zn-1.6Mg-0.7Cu aluminum alloy) (should be Zn of 4.6% by weight, Mg of 1.6% by weight, Cu of 0.7% by weight, the rest is Al) adopt the electron beam welding of the present invention The method, the specific process is that the laser power is 2000w, the welding speed is 1.1m / min, the defocus is 0.25, the shielding gas is high-purity argon, and the shielding gas flow rate is 15L / min. The results show that the Al-Zn-Mg-Cu alloy welded joint has a high tensile strength, which can reach 340MPa, which is about 82% of the base metal.
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