Flux cored wire is a new type of welding material developed in recent decades. It has the advantages of excellent process performance of electrode arc welding and high efficiency automatic welding of CO2 solid wire gas protection. Under the action of arc high temperature, various substances in the core Gasification and slagging are combined with gas and slag for molten droplets and molten pool. The welding process performance is obviously improved, the droplets are sprayed, the splash is small (or no splash), the weld is beautifully formed, and it is suitable for all-position welding. The deposition rate is higher than the CO2 solid wire, which is about 4 times that of the electrode arc welding. The continuous welding process reduces the no-load loss of the welder; the welding current passes through a very thin metal sheath, which has a high current density, increases the resistance heat, improves the heat source utilization rate, and comprehensively saves energy by 20% to 30% (with electrode arc welding phase) ratio). The unit cost of the weld is significantly lower than the electrode arc welding, and is slightly lower than the solid wire. Now we quote the data of Dazhong Group's welding gears for analysis and comparison.
The application rate of flux cored wire CO2 gas shielded welding in the shipbuilding industry reached 65.03% (statistics in 2001), and the application range of boiler and pressure vessel industry, bridge and steel structure, engineering machinery and pipeline installation is increasing. The industry has won significant economic benefits.
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