Abstract
Twin-wire indirect arc welding(TWIAW)owns advantages including high deposition efficiency, cost-effective energy utilization and low dilution rate of the base metal. However, there are some disadvantages such as small depth of fusion and narrow process window during welding. This work studied the influence of the external magnetic field on the formation of surfacing stainless steel layer prepared by the TWIAW. The effect of external magnetic field on welding process and pitting corrosion of surfacing layer was studied. The results show that the applied magnetic field can significantly modified the indirect arc shape and the associated pitting corrosion performance of the surfacing layer. Under the condition of the external magnetic field in the negative x-direction, the arc became lengthened and the heat input to the workpiece was increased accordingly. This is beneficial for improving the weld shape and the pitting corrosion resistance of the surfacing layer.
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