The invention relates to a coated electrode comprising a central metal core being surrounded at least in part by an outer coating containing rutile and at least one lithium-based compound and being free of sodium feldspar and potassium feldspar. According to the invention, the electrode comprises at least one inner coating arranged between the outer coating and the central metal core, said inner coating containing at least one sodium-based compound and/or at least one potassium based compound. Associated process for welding stainless steel.

The present disclosure relates to a method for producing a tubular welding electrode comprising the steps of providing a strip of copper-coated steel material having a length and first and second surfaces, wherein at least the first surface of the strip is at least substantially coated with a copper alloy, forming the strip into a U shape along the length, filling the U shape of the strip with a granular powder flux, and mechanically closing the U shape to form a sheath of copper-coated steel material that substantially encases the granular powder flux, thus forming a tubular welding electrode.

An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an -phase of a copper-zinc based alloy. The outermost layer has a Cu concentration of 12 to 20 mass % and a variation range within 5 mass % in the Cu concentration in a longitudinal direction of the electrode wire.

A flux applying device for applying flux to a surface of solder, wherein the flux applying device includes: a dipping means that applies the flux to the surface of the solder by dipping the solder into the flux; a load applying means that applies a predetermined load to the solder, the load applying means being provided at a upstream side of the dipping means; a constant speed conveying means that conveys the solder at a predetermined speed with being under load by the load applying means; a drying means that dries the solder to which the flux is applied; a cooling means that cools the dried solder; a conveying speed measurement means that measures a conveying speed of the solder; and a control means that controls the conveying speed of the solder.

An electrical discharge machining electrode wire includes a core including a copper or a copper alloy, and a covering layer that covers a periphery of the core and includes a zinc. The covering layer includes an outermost layer consisting of an -phase of a copper-zinc based alloy. The outermost layer has a Vickers hardness of 200 to 300 Hv.

A welding power supply is configured to supply electric power to a coated electrode. The welding power supply includes a rectifying circuit that converts inputted AC power into DC power, and an inverter circuit that converts the DC power into AC power to be outputted to the coated electrode. The inverter circuit is configured to output a square-wave current.

This disclosure relates generally to Gas Metal Arc Welding (GMAW) and, more specifically, to Metal-cored Arc Welding (MCAW) of mill scaled steel workpieces. A metal-cored welding wire, including a sheath and a core, capable of welding mill scaled workpieces without prior descaling is disclosed. The metal-cored welding wire has a sulfur source that occupies between approximately 0.04% and approximately 0.18% of the weight of the metal-cored welding wire, and has a cellulose source that occupies between approximately 0.09% and approximately 0.54% of the weight of the metal-cored welding wire.

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.

Processes for depositing a desired superalloy composition are provided. An elongated core member (20), such as made up of a wrought nickel-base alloy or a wrought cobalt-base alloy, may be drawn in connection with a wire drawing process. Elongated core member (20) includes at least one strengthening constituent having a reduced concentration to provide a desired level of ductility appropriate for the drawing of elongated core member (20). A coating (22) is applied to elongated core member (20). Coating (22) is configured to introduce a sufficient concentration of the strengthening constituent to form the desired superalloy composition when the coating and the elongated core member are melted together. This melting may occur during a welding process conducive to depositing the desired superalloy composition. The welding process may be performed in the context of repairing, rebuilding, and manufacturing superalloy components, such as for a gas turbine engine.