Chinese Journal of Lasers, Volume. 45, Issue 12, 1202005(2018)
Influence of He-Ar Mixed Shielding Gas on Laser-MIG Hybrid Welding Characteristic of Aluminum Alloys
Figures & Tables(10)
Fig. 2. Droplet transition phenomena in laser-MIG hybrid welding under different shielding gases. (a) 100%Ar; (b) 75%Ar+25%He; (c) 50%Ar+50%He; (d) 25%Ar+75%He; (e) 100%He
Fig. 3. Pulsed current and voltage waveforms under different shielding gases. (a) 100%Ar; (b) 75%Ar+25%He; (c) 50%Ar+50%He; (d) 25%Ar+75%He; (e) 100%He
Fig. 5. Radiographs, surface morphologies and longitudinal sections of welds under different shielding gases. (a) 100%Ar; (b) 75%Ar+25%He; (c) 50%Ar+50%He; (d) 25%Ar+75%He; (e) 100%He
Fig. 6. Relationship between argon content in mixed shielding gas and weld porosity
Fig. 7. Keyhole characteristics in laser-MIG hybrid welding under different He-Ar shielding gases.(a) 100%Ar; (b) 75%Ar+25%He; (c) 50%Ar+50%He; (d) 25%Ar+75%He; (e) 100%He
Table 1. Compositions of base metal and weld wire (mass fraction, %)
View tableTable 1. Compositions of base metal and weld wire (mass fraction, %)
Material Si Fe Cu Mn Mg Cr Zn Al A7N01 ≤0.30 ≤0.35 ≤0.20 0.20-0.70 1.0-2.0 ≤0.30 4.0-5.0 Bal. ER5356 ≤0.25 ≤0.40 ≤0.10 0.05-0.20 4.5-5.5 0.05-0.20 ≤0.10 Bal.
Table 2. Process parameters of laser-MIG hybrid welding
View tableTable 2. Process parameters of laser-MIG hybrid welding
Welding parameter Value Wire feeding speed /(m·min-1) 8.0 Welding speed /(m·min-1) 0.6 Laser power /kW 4000 Distance between laser and arc /mm 3 V Ar∶V He1∶0,3∶1,1∶1,1∶3,0∶1
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Shuang He, Hui Chen, Chuang Cai, Yanjie Yin. Influence of He-Ar Mixed Shielding Gas on Laser-MIG Hybrid Welding Characteristic of Aluminum Alloys[J]. Chinese Journal of Lasers, 2018, 45(12): 1202005
Paper Information
Category: laser manufacturing
Received: Jun. 19, 2018
Accepted: Aug. 10, 2018
Published Online: May. 9, 2019
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