This study has analyzed welding defects generated according to the welding current and the voltage in flux cored arc welding. Analyzing welding faults such as under cut, overlap, porosity, slag inclusion, spatter, lack of penetration for different welding current and voltage, optimal welding conditi...
This study has analyzed welding defects generated according to the welding current and the voltage in flux cored arc welding. Analyzing welding faults such as under cut, overlap, porosity, slag inclusion, spatter, lack of penetration for different welding current and voltage, optimal welding condition has been developed. 1. Stable current to avoid the welding defects was 170(A). When welding current was much lower than 170(A), spatter was more generated and porosity, slag inclusion, lack of penetration were generated. When welding current was much higher than 170(A), under cut and crack were generated and bead appearance was bad. 2. The welding defect was the least at 25(V) welding voltage, When arc voltage was much higher than 25(V), spatter was more generated, bead appearance was rough, crack and under cut were generated. When arc voltage was much lower than 25(V), slag inclusion, lack of penetration were generated. 3. When the wire protrusion length was 1.9(mm), welding defects weren't generated. When the wire protrusion length was much shorter than 1.9(mm), there are many spatters, nozzle was closed and welding defects were increased. When the wire protrusion length was much longer than 1.9(mm), arc's stability was fallen and bead was bad, spatter was increased.
This study has analyzed welding defects generated according to the welding current and the voltage in flux cored arc welding. Analyzing welding faults such as under cut, overlap, porosity, slag inclusion, spatter, lack of penetration for different welding current and voltage, optimal welding condition has been developed. 1. Stable current to avoid the welding defects was 170(A). When welding current was much lower than 170(A), spatter was more generated and porosity, slag inclusion, lack of penetration were generated. When welding current was much higher than 170(A), under cut and crack were generated and bead appearance was bad. 2. The welding defect was the least at 25(V) welding voltage, When arc voltage was much higher than 25(V), spatter was more generated, bead appearance was rough, crack and under cut were generated. When arc voltage was much lower than 25(V), slag inclusion, lack of penetration were generated. 3. When the wire protrusion length was 1.9(mm), welding defects weren't generated. When the wire protrusion length was much shorter than 1.9(mm), there are many spatters, nozzle was closed and welding defects were increased. When the wire protrusion length was much longer than 1.9(mm), arc's stability was fallen and bead was bad, spatter was increased.
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