Pure argon gas shielded welding mig flux-cored wire and mig arc welding method
A technology of flux-cored welding wire and welding wire, used in arc welding equipment, welding/welding/cutting items, welding medium, etc., can solve problems such as solidification cracks, achieve high static tensile strength and fatigue strength, and suppress slag and smoke. , low cost effect
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[0021] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. figure 1 It is a perspective view showing a MIG welding method using pure Ar gas according to the embodiment as a shielding gas. The welding wire 13 is continuously supplied to the welding torch 1 , and the welding wire 13 is fed out from the tip of the welding torch 1 toward the base material 21 through the center portion of the welding torch 1 . With the welding wire 13 as the positive electrode and the base material 21 as the negative electrode, a welding voltage is applied from a power supply (not shown), and an arc 31 is formed between the welding wire 13 and the base material 21 . The arc 31 melts the welding wire 13 and the base material 21 to form a molten pool 175 . At this time, if figure 2 As shown in (b), Ar gas as a shielding gas is supplied to the vicinity of the molten pool 175 formed between the welding wire 13 and the base material 21, and...
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