An aluminum alloy flux-cored welding wire and a fabrication method thereof are provided. In the present disclosure, a mixed salt is used as a filler for the flux-cored welding wire, and a reaction between the mixed salt and a welding base metal is directly induced through welding heat to produce in situ nanoparticles, which not only reduces a production cost of the welding wire, but also enhances the bonding between the added particles and the base metal through the prominent wettability between the in-situ enhancement particles and the base metal; and a rare earth element is added to significantly refine grains, which provides a new idea for the selection of a flux-cored welding wire for 7XXX aluminum alloy welding.

An aluminum alloy flux-cored welding wire and a fabrication method thereof are provided. In the present disclosure, a mixed salt is used as a filler for the flux-cored welding wire, and a reaction between the mixed salt and a welding base metal is directly induced through welding heat to produce in situ nanoparticles, which not only reduces a production cost of the welding wire, but also enhances the bonding between the added particles and the base metal through the prominent wettability between the in-situ enhancement particles and the base metal; and a rare earth element is added to significantly refine grains, which provides a new idea for the selection of a flux-cored welding wire for 7XXX aluminum alloy welding.

A wire (10) for use in a brazing or soldering operation has an elongated body (12) of a metallic material. The elongated body (12) has an outer surface (18). A channel (14) is formed along a length of the body. The channel (14) has an opening (A.sub.1). A flux solution (22) is deposited within the channel (14) and along the length of the body. The flux solution (22) covers a portion of the outer surface (18). A portion of the flux solution (22) is exposed through the opening (A.sub.1) in the channel (14).

The invention relates generally to welding and, more specifically, to corrosion resistant weld deposits created during arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). A disclosed corrosion resistant weld deposit comprises nickel, chromium, and copper, and has a low porosity.

The disclosed technology generally relates to consumable electrode wires and more particularly to consumable electrode wires having a core-shell structure, where the core comprises chromium. In one aspect, a welding wire comprises a sheath having a steel composition and a core surrounded by the sheath. The core comprises chromium (Cr) at a concentration between about 12 weight % and about 18 weight % on the basis of the total weight of the welding wire, manganese (Mn) at a concentration between about 12 weight % and about 18 weight % on the basis of the total weight of the welding wire, nickel (Ni) at a concentration between zero and about 5 weight % on the basis of the total weight of the welding wire, and carbon (C) at a concentration greater than zero weight %, wherein concentrations of Ni, C and Mn are such that [Ni]+30[C]+0.5[Mn] is less than about 12 weight %, wherein [Ni], [C], and [Mn] represent weight percentages of respective elements on the basis of the total weight of the welding wire. The disclosed technology also relates to welding methods and systems adapted for using the chromium-comprising electrode wires.

The present disclosure provides a welding electrode and methods of manufacturing the same. The welding electrode can include a composite body having a tip portion and an end portion. The composite body can include a shell defining a cavity through the end portion, the shell comprising a first metal that includes one or more of the following: a precipitation hardened copper alloy, copper alloy, and carbon steel. The composite body can also include a core within the shell, the core extending through the shell from the tip portion to the cavity, the core comprising a second metal that includes dispersion strengthened copper. The core and the shell have a metallurgical bond formed from co-extrusion.

Partial discharges in a high voltage electric machine can be monitored by a partial discharge monitor connected to the high voltage electric machine successively via a capacitive coupler and a connection cable. The connection cable can have a conductive element designed to self-destruct in the presence of electric current amplitude significantly exceeding expected current amplitudes from said partial discharges, and having diameter designed to avoid creation of additional partial discharges within the cable itself. The connection cable can be light enough to avoid adding excessive weight to the stator windings.

The present invention relates to a flux cored wire and the method and apparatus for manufacturing the same. The flux cored wire in accordance with the present invention can prevent the flux filled inside strip from leaking out and the moisture in the atmosphere from penetrating into the flux. The method of the present invention also does not require longer processing time. For this, the flux cored wire in accordance with the present invention is comprised of: an inner tubular body formed with flat strip by curling up the side edges of the strip into a tubular body having a seam and filed with flux inside; and an outer tubular body formed with flat strip by curling up the side edges of the strip into a tubular body having a seam and wrapping around the inner tubular body in tight contact.

Brazing alloy wire formed from a composite comprising a sheath of at least one ductile first phase and a core comprising particles of a different composition to the sheath, in which: the sheath has an annealing temperature in degrees K the particles have a melting point at least 20% above the annealing temperature of the sheath the particles have a size distribution in which 25% by weight or less comprise particles less than 25 m in size the particles are discrete.

The invention relates generally to welding and, more specifically, to welding wires for arc welding, such as Gas Metal Arc Welding (GMAW) or Flux Core Arc Welding (FCAW). A disclosed tubular welding wire has a sheath and a core, and the tubular welding wire includes an organic stabilizer component, a rare earth component, and a corrosion resistant component comprising one or more of: nickel, chromium, and copper.