The invention relates to a method for producing a welding wire that includes the steps of providing a hollow wire, through at least part of which at least one cavity extends; producing the welding wire by introducing a welding material containing titanium aluminide or at least one nickel-based superalloy into the at least one cavity, the at least one cavity being evacuated or being filled with a protective gas before, during and/or after the introduction of the welding material, and the hollow wire being formed from nickel if the welding material contains the at least one nickel-based superalloy. Further aspects of the invention relate to a welding wire and to a component having at least one component region obtained by hardfacing using at least one such welding wire.

A flux-cored wire including a sheath and a flux that fills the sheath, wherein the flux includes a titanate and a nanoparticulate oxide selected from the group consisting of TiO.sub.2, SiO.sub.2, ZrO.sub.2, Y.sub.2O.sub.3, Al.sub.2O.sub.3, MoO.sub.3, CrO.sub.3, CeO.sub.2, La.sub.2O.sub.3 and mixtures thereof.

A Ni-based alloy flux-cored wire includes the contents of Mn and Nb that are adjusted so that, from the wire, it is possible to obtain a weld metal having an excellent bead shape, good arc stability, spattering inhibition effect, good strength, good defect resistance, and good crack resistance. The Ni-based alloy flux-cored wire produces a weld metal having an excellent bead shape in multiple position welding of Ni-based alloy, 9% Ni steel, and high corrosion-resistance austenitic stainless steel, and an effect of producing a weld metal having good strength, defect resistance, and crack resistance.

A flux-cored wire may be used with an Ar—CO.sub.2 mixed gas, the wire having a steel sheath filled with a flux. Such flux-cored wires may include, as a total of the steel sheath and the flux, relative to a total wire mass: Fe in 92 mass % or more, total Si in a 0.50 mass % or more and 1.50 mass % 15 or less, Mn in 1.00 mass % or more and 3.00 mass % or less, total Li in 0.010 mass % or more and 0.10 mass % or less, and total Mg in 0.02 mass % or more and less than 0.50 mass %, C in 0.15 mass % or less, P in 0.030 mass % or less, S in 0.030 mass % or less, and a slag forming agent in 0.50 mass % or less.

A pre-coated steel substrate coated with: —optionally, an anticorrosion coating and —a flux including at least one titanate and at least one nanoparticle chosen from: TiO2, SiO2, Yttria-stabilized zirconia (YSZ), Al2O3, MoO3, CrO3, CeO2 or a mixture thereof, the thickness of the flux being between 30 and 95 μm.

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). In one embodiment, a tubular welding wire for joining steel workpieces via arc welding includes a steel sheath disposed around a core. The core includes iron powder, iron titanium powder, silico-manganese powder, iron silicon powder, iron sulfide, graphite, rare earth compound, and a frit. The frit includes a Group I or Group II compound, silicon dioxide, and titanium dioxide. The graphite and the frit together comprise less than 10% of the core by weight.

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 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). In one embodiment, a tubular welding wire includes a sheath and a core. The tubular welding wire includes less than approximately 0.4% manganese metal or alloy by weight, and the tubular welding wire is configured to form a weld deposit having less than approximately 0.5% manganese by weight.

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). In one embodiment, a tubular welding wire includes a sheath and a core. The tubular welding wire is configured to form a weld deposit on a structural steel workpiece, wherein the weld deposit includes less than approximately 2.5% manganese by weight.

A flux for submerged arc welding is a sintered flux and is for use in high speed welding. In the flux, the following relationships of contents in mass percent are satisfied: CaF.sub.2: 10.0% to 20.0%, MgO: 8.0% to 15.0%, a sum of Na.sub.2O and K.sub.2O: 2.1% to 3.5%, MnO: 1.5% to 5.0%, FeO: 0.5% to 5.0%, SiO.sub.2: 10.0% to 20.0%, Al.sub.2O.sub.3: 13.0% to 28.0%, and TiO.sub.2: 13.0% to 28.0%. In addition, the following relationships are further satisfied: 65≤(MgO+SiO.sub.2+Al.sub.2O.sub.3+TiO.sub.2)≤75, and 0.5≤(Al.sub.2O.sub.3/TiO.sub.2)≤2.0.