Study on the behavior of high-frequency pulsed TIG arc and molten pool flow of Inconel-52M welding wire
Based on high-speed camera and image pro-cessing technology,the influence of pulse frequency(0-60 kHz)on the behavior of welding arc and molten pool flow of Inconel-52M nickel alloy welding wire was analyzed,as well as their underlying mechanisms.The results indicated that the combination of high-frequency pulse current on conventional low-frequency pulse current could significantly shrink the arc shape,and the arc root size would gradually decrease with the increase of high-frequency pulse frequency.Compared to tra-ditional low-frequency pulse welding,the overall area of the high-frequency pulsed arc decreased,while its core area and proportion increased,leading to improved arc energy concen-tration and temperature.Under the influence of high-fre-quency pulse current,both the axial pressure and radial electro-magnetic force of the welding arc increased,with maximum in-creases of 18.0%and 8.1%,respectively.The rise in axial pressure promoted the fluidity of the weld pool,enabling more complete liquid metal flow during the welding process and res-ulting in a weld morphology characterized by large width and low wetting angle.
high-frequency pulse currentwelding arcelectromagnetic forcemolten pool flow
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NSTL
万方数据
维普
