TIG welding or soldering with metal transfer through a liquid metal bridge

摘要

An arc welding process employing a TIG torch provided with a non-consumable electrode (4) and a consumable filler wire (1), involves feeding the consumable wire at an angle (alpha ) of less than 50[deg] to the axis of the electrode; guiding and keeping the end of the consumable wire permanently at a distance (D) of less than 2 mm from the end of the tungsten electrode of the TIG torch; and transferring metal to the welded joint via a liquid bridge (3) so that there is permanent contact between the puddle of molten metal (2) forming the welded joint (6) and the melted end of the filled wire. An arc welding process employing a TIG torch provided with a non-consumable electrode and a consumable filler wire, the end of the consumable wire being progressively melted by an electric arc (5) generated between the non-consumable electrode and at least one workpiece (8) to be welded, involves feeding the consumable wire at an angle (alpha ) of less than 50[deg] to the axis of the electrode; guiding and keeping the end of the consumable wire permanently at a distance (D) of less than 2 mm from the end of the tungsten electrode of the TIG torch; and transferring metal 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.