In various embodiments, additive manufacturing is utilized to fabricate three-dimensional metallic parts using metallic alloy wire as a feedstock material.

The disclosure provides a low-nickel nitrogen-containing austenitic stainless steel flux-cored wire and a preparation method thereof, and belongs to the technical field of welding materials. The disclosure aims at solving the technical problems of nitrogen element loss, air holes, hot cracks in a welding seam area, and pitting corrosion caused by nitride precipitation in a heat affected area that are easily generated in a welding joint when low-nickel nitrogen-containing austenitic stainless steel is welded in the prior art. The flux-cored wire of the disclosure is prepared from a flux core and a stainless steel sheath. During welding, gas protection is not needed. The flux core is formed by mixing an alloy component and a slag system. The alloy component is formed by mixing electrolytic manganese, ferrosilicon, chromium metal, nickel metal, ferromolybdenum, copper powder and ferrochrome nitride powder in percentage by mass. The slag system is formed by mixing complex fluoride, a carbonate mixture, potassium feldspar, rutile, zircon sand and Al—Mg alloy in percentage by mass. The method includes: mixing the alloy component and the slag system, filling the mixture into the stainless steel sheath, and performing drawing and diameter reduction to obtain the low-nickel nitrogen-containing austenitic stainless steel flux-cored wire.

Provided is flux for resin flux cored solder using in a soldering method in which the resin flux cored solder is supplied into a through hole formed along a central axis of a soldering iron. The flux contains volatile rosin in an amount of 70 wt % or more and 98 wt % or less, non-volatile rosin in an amount of 0 wt % or more and 10% or less, and an activator in an amount of 2 wt % or more and 30 wt % or less, the activator including an organic acid in an amount of 0 wt % or more and 15 wt % or less, an organohalogen compound in an amount of 0.5 wt % and 15 wt % or less, an amine in an amount of 0 wt % or more and 5 wt % or less, and an amine hydrohalide salt in an amount of 0 wt % or more and 2.5 wt % or less.

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.

The present disclosure provides a copper-phosphorus-tin brazing wire and a preparation method thereof, relates to the technical field of brazing materials. The copper-phosphorus-tin brazing wire is of a three-layer structure, the inner layer is Cu, the middle layer is Cu-14P alloy, and the outer layer is Sn, wherein the mass percentage of Sn is over 7%. The present disclosure solves the technical problems in the prior art that the copper-phosphorus-silver brazing filler metal is prone to produce defects such as pores and inclusions when brazing copper alloys, which leads to the decline of the mechanical properties of the joint, and simultaneously provides the preparation method of the copper-phosphorus-tin brazing wire, such that the technical problem that it is difficult to obtain copper-phosphorus-tin brazing wire with a wire diameter below 0.5 mm under the condition of high Sn content is solved.

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.

Embodiments of the present disclosure describe a system for capturing dust and dust-laden air caused by the agitation, movement or transfer of particulate material. The system includes a dust collection assembly positioned proximate and associated with the delivery of particulate material to capture dust particles released by movement and settling of the particulate material when being dispensed and delivered. The dust collection assembly is positioned to direct an air flow in a flow path overlying the dust particles to capture the dust particles and move the dust particles away from the proppant thereby reducing risk of dust exposure.

The present disclosure relates to tubular welding electrodes that have a metallic sheath surrounding a granular core, wherein the metallic sheath comprises a metal matrix composite (MMC) that includes a ceramic material and aluminum or an aluminum alloy. The ceramic material may be in the form of microparticles or nanoparticles. The present disclosure also relates to method for making such tubular welding electrodes.

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.