Heat Transfer Mechanism and Research Status of Indirect Arc Welding Technology
In traditional arc welding technology,the improvement of welding efficiency is accompanied by the increase of heat input,which is not conducive to the improvement of welding quality.Indirect arc welding technology realizes the decoupling effect of welding efficiency and heat input through disconnecting the electrode with the base metal,and it has unique advantage of improving welding efficiency and reducing the heat input of the base metal.The difference of heat and mass transfer mechanism between indirect arc welding and traditional arc welding was analyzed,and the current research status of indirect arc welding technology was summarized.It is pointed out that the main research in the future will be in the following three directions:one is to study the multi-heat source compound process;the other is to study the behavior of molten droplet and the heat-force mechanism of the molten pool by finite element modeling technology to promote the applicability of spatial multi-position welding;the third is to study the common deposition mechanism of dissimilar welding wires.
indirect arc weldingtraditional arc weldingheat transfer
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