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.

Disclosed herein are embodiments of hardfacing/hardbanding materials, alloys, or powder compositions that can have low chromium content or be chromium free. In some embodiments, the alloys can contain transition metal borides and borocarbides with a particular metallic component weight percentage. The disclosed alloys can have high hardness and ASTM G65 performance, making them advantageous for hardfacing/hardbanding applications.

A solder connection may be surrounded by a solder locking layer (1210, 2210) and may be recessed in a hole (1230) in that layer. The recess may be obtained by evaporating a vaporizable portion (1250) of the solder connection. Other features are also provided.

Embodiments of the present invention are directed to flux-cored brazing consumables and preforms which have at least one protrusion which extends from an outer surface of the consumable such that the protrusion engages with a surface of a component to be brazed. The protrusion aids in securing the brazing consumable in position during manufacture, assembly and transport of an assembly to be brazed, prior to a brazing operation.

A flux-cored wire for gas-shielded arc welding, including, in terms of mass % relative to a total mass of the wire, in the total of the steel outer sheath and the flux, C: 0.03 to 0.08%, Si: 0.1 to 0.6%, Mn: 1.5 to 2.8%, Cu: 0.01 to 0.5%, Ni: 0.35 to 0.98%, Ti: 0.05 to 0.25%, and B: 0.002 to 0.015%, Al: 0.05% or less, and including, in the flux, TiO.sub.2 conversion value: 3 to 8%, Al.sub.2O.sub.3 conversion value: 0.1 to 0.6%, SiO.sub.2 conversion value: 0.2 to 1.0%, ZrO.sub.2 conversion value: 0.20 to 0.65%, Mg: 0.2 to 0.8%, F conversion value: 0.05 to 0.25%, Na conversion value: 0.02 to 0.10%, and K conversion value: 0.05 to 0.20%.

A flux-cored wire for gas-shielded arc welding in which a steel sheath is filled with flux and the flux-cored wire contains Fe, C, Mn, Cr, Ni, Mo, Nb, V, P, and S within controlled amounts, and further contains, with respect to the total mass of the wire, TiO.sub.2: 3.0 mass % or more and 9.0 mass % or less, a SiO.sub.2 conversion value of metal Si and a Si compound: 0.5 mass % or more and 1.5 mass % or less, Co: 0.10 mass % or more and 1.50 mass % or less, N: 0.015 mass % or more and 0.060 mass % or less, Li: 0.11 mass % or less, Mg: 0.85 mass % or less, and a total amount of K and Na: 0.3 mass % or less.

A cable-type welding wire provided in the present application, includes a central welding wire and n peripheral welding wires arranged so as to be spirally wound on the central welding wire, with each of the peripheral welding wires having a diameter of d.sub.peripheral, and adjacent peripheral welding wires being arranged to be tangential to each other, wherein, the peripheral welding wires have a lay length of T, which satisfies the equation of T=m?(d.sub.peripheral+d.sub.central)/2, where m is a multiple of the lay length, d.sub.peripheral is a diameter of the peripheral welding wire, d.sub.central is a diameter of the central welding wire, and 3.2?m<20. This application can obtain a smaller penetration depth when the welding parameters remain constant due to a small multiple of the lay length of the cable-type welding wire, and can further reduce welding arcing current.

An ultra high-strength flux-cored arc welded joint having excellent impact toughness comprises: 0.01 wt % to 0.06 wt % of carbon (C), 0.1 wt % to 0.5 wt % of silicon (Si), 1.5 wt % to 3.0 wt % of manganese (Mn), 2.5 wt % to 3.5 wt % of nickel (Ni), 0.5 wt % to 1.0 wt % of molybdenum (Mo), 0.4 wt % to 1.0 wt % of copper (Cu), 0.4 wt % to 1.0 wt % of chromium (Cr), 0.01 wt % to 0.1 wt % of titanium (Ti), 0.003 wt % to 0.007 wt % of boron (B), 0.001 wt % to 0.006 wt % of nitrogen (N), 0.02 wt % (excluding 0) or less of phosphorus (P), 0.01 wt % (excluding 0) or less of sulfur (S), 0.03 wt % to 0.07 wt % of oxygen (O), and remaining iron (Fe) as well as unavoidable impurities.

Embodiments of the present invention comprise a system and method to weld or join coated materials using an arc welding system alone, or in combination with a hot wire system, where the arc welding system uses a welding current having an AC current portion to build a droplet for transfer to the workpiece. In further embodiments, the workpiece is coated with a material, such as zinc, and the arc welding system uses an AC welding waveform which is capable of welding coated workpieces with little or no porosity or spatter and can achieve enhanced performance. Additional embodiments use an enhanced electrode to provide optimum porosity performance. Such embodiments allow for the welding of coated material with little or no porosity and spatter, and at a high welding rate.

Embodiments of the present invention comprise a system and method to weld or join coated materials using an arc welding system alone, or in combination with a hot wire system, where the arc welding system uses a welding current having an AC current portion to build a droplet for transfer to the workpiece. In further embodiments, the workpiece is coated with a material, such as zinc, and the arc welding system uses an AC welding waveform which is capable of welding coated workpieces with little or no porosity or spatter and can achieve enhanced performance. Additional embodiments use an enhanced electrode to provide optimum porosity performance. Such embodiments allow for the welding of coated material with little or no porosity and spatter, and at a high welding rate.