Abstract: The invention relates to a braze-welding or arc-welding method using a TIG torch equipped with a non-consumable electrode (1) and a consumable filler wire (2) of a given diameter, wherein the transfer of metal to the welded joint occurs in successive droplets of molten metal deposited at a frequency of between 20 Hz and 90 Hz, and the size of said drops is between 1, 2, and 4 times the diameter of the consumable wire.

Abstract: An arc welding process using a consumable electrode, in which welding cycles follow one after another over the course of time, each comprising an arc period and a short-circuit period in which the liquid metal establishes a short-circuit between the end of the electrode and the workpiece or workpieces. Each cycle comprises the steps of: maintaining an arc current I2 at the same time as the consumable electrode is moved towards the workpiece; reducing the current so as to reach a minimum current I1 at the start of the short-circuit; reducing the speed of the consumable wire electrode; increasing the current over the short-circuit period in order to reach a maximum value I4; and then reducing the current over the short-circuit period in order to reach a minimum value I1.

Abstract: The invention relates to a process for the braze-welding of steel workpieces using a laser beam, for example of the Nd:YAG, CO2, fibre or diode type, a consumable wire being the filler metal, and a gas mixture as gas shield, so as to produce a braze-welded joint between the workpieces. The consumable wire is based on copper and the gas mixture contains 40 to 60% oxygen and at least one gas chosen from argon, nitrogen and helium for the remainder.

Abstract: A method for the TIG braze-welding of one or more steel workpieces employing a TIG welding torch, a consumable wire and a shielding gas, characterized in that the shielding gas is a ternary gas mixture formed from helium, hydrogen and argon, containing less than 5% helium by volume; less than 1% hydrogen by volume; and argon for the balance. Application of the method to the welding of galvanized carbon steel sheet for automobiles.

Abstract: The invention relates to a arc welding process employing a TIG torch provided with a non-consumable electrode and a consumable filler wire, the end of said consumable wire being progressively melted by an electric arc generated between the non-consumable electrode and at least one workpiece to be welded so as to transfer molten metal from the wire to said workpiece and thus obtain a welded joint. The consumable wire is fed in at an angle of less than 50° to the axis of the electrode. Metal is transferred to the welded joint via a liquid bridge so that there is permanent contact between the puddle of molten metal forming the welded joint and the melted end of the filled wire.