Hiroshima University Graduate School of Engineering Hiroshima University ! ! ! ! ! ! Graduate School of Engineering Graduate School of Engineering Hiroshima University Welding direction Wire heating Power source Iw Ia GTA Power source Hiroshima University Graduate School of Engineering Hiroshima University Graduate School of Engineering Hiroshima University Graduate School of Engineering Hiroshima University ! ! ! ! ! Graduate School of Engineering Hiroshima University Graduate School of Engineering Hiroshima University Graduate School of Engineering Graduate School of Engineering Hiroshima University 10kJ/mm 1/5 2m/h 10mm ±5mm 20% 1/10 Hiroshima University Graduate School of Engineering Hiroshima University Graduate School of Engineering Hiroshima University Graduate School of Engineering Welding direction Hiroshima University Graduate School of Engineering 24 (HLW) EGW :EH47 :YM-1N HLW Hiroshima University Graduate School of Engineering 300 7mm Vickers hardness (HV10) (HV) 6kW 1/2t 250 200 150 HAZ Z W rved. WM HAZ 100 30 40 -20 HAZ 8mm -15 -10 -5 0 5 10 15 Distance from center of WM (mm) 20 Hiroshima University Welding speed : 1 m/h Joint fulfill : 100 % Lack of fusion : 0 % Penetration depth : 3.2 mm Dilution ratio : 26 % Graduate School of Engineering Welding speed : 2 m/h Joint fulfill : 100 % Lack of fusion : 22 % Penetration depth : 0.6 mm Dilution ratio : 6 % Graduate School of Engineering Hiroshima University Investigated zone Stationary laser beam 6 kW Welding speed 0.25 --> 1.0 m/h Weaving laser beam 6 kW Welding speed 1.0 m/hour Weld metal (x 200) 100#µm 100#µm Weld metal (x 500) 50#µm 50#µm Graduate School of Engineering Hiroshima University Investigated zone Stationary laser beam 6 kW Welding speed 0.25 --> 1.0 m/h Weld metal HAZ Weaving laser beam 6 kW Welding speed 1.0 m/hour Weld metal HAZ Fusion boundary (x 50) 500#µm 500#µm Fusion boundary (x 200) 100#µm 100#µm Graduate School of Engineering Hiroshima University , 51,52 1 2 3 V4 5 V6 7 C V8 V , Hiroshima University ! ! ! ! Graduate School of Engineering Hiroshima University Graduate School of Engineering Thank you for your attention!
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