Pulsed-arc welding process and device

Process for the arc welding in pulsed mode of one or more workpieces made of carbon steel, stainless steel, aluminum or aluminum alloy, with the use of a gas shield, in which an electric arc welding torch is supplied with at least one consumable wire at a wire feed speed (Vwire) and the consumable wire is subjected to current pulses, in order to melt the end of the consumable wire and to detach a drop of molten metal by a current impulse, and in which, for a given pulse frequency, a wire feed speed (Vwire), a mean current (Imean) value and an rms current (Irms) value such that:

• Imean=A1Vwire+B1, where 5<A1<45 and 0<B1<50
• and
• Irms=A2Vwire+B2, where 5<A2<45 and 40<B2<100,
• where Imean and Irms are expressed in amps and Vwire is expressed in m/min, are chosen, and wherein:
• the wire feed speed (Vwire) is between 1 and 20 m/min;
• the pulse frequency is between 20 and 300 Hz;
• and
• the ratio (Irms/Imean) of the rms current Irms) value to the mean current Imean) value is between 1.05 and 2.