Abstract: A method and apparatus for applying a cladding layer to a surface of a component uses a cladding tool having a maximum reach less than the size of the surface. Geometry of the surface is segmented into a plurality of tessellated segments, each of which has a peripheral extent determined by a maximum reach of the cladding tool. A nominal tool subpath for each tessellated segment is generated, and then combined to generate a nominal tool path for depositing the cladding layer on the surface. The surface is clad using the nominal toolpath, including a process of adjusting the nominal tool path to an adjusted tool path that accounts for dimensions of the bead to be deposited by the tool to match an edge of the bead to be deposited with an edge of a previously deposited bead.

Abstract: The disclosed technology generally relates to welding, and more particularly to a consumable welding wire for metal arc welding, and a method and a system for metal arc welding using the consumable welding wire. In one aspect, a method of arc welding includes providing a welding wire comprising one or more alkaline earth metal elements. The method additionally includes applying power to the welding wire to generate a plasma arc sufficient to melt the welding wire. The method further includes depositing molten droplets formed by melting the welding wire onto a workpiece at a high deposition rate while regulating to maintain a substantially constant power delivered to the plasma arc.

Abstract: In a method and device for performing welding, after the welding current reaches a first current value during a short circuit, the feeding of the welding wire is stopped, slowed down, or moved backward. As a result, the opening of a short circuit is urged to reduce the frequency at which welding is unnecessarily interrupted by an overcurrent protection function. This achieves high weld quality such as the absence of welding defects, and high production efficiency.

Abstract: Some embodiments are directed to a device for the three-dimensional printing of a component that is to be produced, the component to be produced including a receiving surface, the device comprising: a print head that includes: a supplier for supplying a ferromagnetic print material, the supplier including an outlet; and a device for allowing the melting of the print material prior to laying; a first inert-gas spray nozzle disposed at the level of the outlet of the supplier; and a second inert-gas spray nozzle disposed at the level of a point of contact of the molten print material with the receiving surface of the component that is to be produced in the process of being produced so as to allow gas to be supplied at a desired pressure.

Abstract: In various embodiments, wire composed at least partially of arc-melted refractory metal material is utilized to fabricate three-dimensional parts by additive manufacturing.

Abstract: In a method and device for performing welding, after the welding current reaches a first current value during a short circuit, the feeding of the welding wire is stopped, slowed down, or moved backward. As a result, the opening of a short circuit is urged to reduce the frequency at which welding is unnecessarily interrupted by an overcurrent protection function. This achieves high weld quality such as the absence of welding defects, and high production efficiency.

Abstract: A system and method of welding is provided where a first welding power supply provides a first welding waveform to a strip electrode for welding a work piece and a second welding power supply provides a second welding waveform to at least one curtain electrode for welding the work piece. The at least one curtain electrode is positioned adjacent to a side of said strip electrode during welding.

Abstract: A welding device and method for powder welding. The welding device includes at least a first container for fluxing agent in powder form, which first container includes an outlet with an outlet direction arranged for outflow of powder. The welding device further includes a first member for inlet of heated gas into the first container. The welding method includes arranging powder in the first container. Gas is heated and is allowed to pass into the first container for heating of the powder. The powder is then deposited on a welding area.

Abstract: A method and system to weld or join workpieces employing a high intensity energy source to create a weld puddle and at least one resistive filler wire which is heated to at or near its melting temperature and deposited into the weld puddle.

Abstract: A method of depositing a multi-layer cladding (40) of superalloy material and an apparatus so formed. A first layer of material (20) is deposited on a substrate (22) such as by laser cladding of superalloy powder (54). The deposited material includes a directionally solidified region (24) and a topmost equiaxed region (26). The topmost region is removed such as by grinding to expose a flat surface (28) of directionally solidified material. A second layer of material (32) deposited onto the exposed flat surface will again have a directionally solidified region (34) and a topmost equiaxed region (36). The process is repeated until a desired thickness of cladding material is achieved, the multi-layer cladding having no equiaxed material between its layers throughout its thickness.

Abstract: A process for closing an opening in a surface of a component, and components formed thereby. The process entails forming a channel in the component surface so that the channel at least partially surrounds an opening at the component surface. An alloy is then deposited in the channel to form a crack-free deposit in the channel. A step is then machined that intersects the opening and is at least partially formed in the deposit. The step defines a recess that is at least partially surrounded by a peripheral portion of the deposit and has a surface recessed into the component surface. A cap is placed in the recess and welded to the peripheral portion of the deposit to define a weld joint that completely closes the opening. The surface of the weld joint is then machined to form a machined surface that is substantially flush with the component surface.

Abstract: A welding head is provided. The welding head includes a bracket and a plurality of blocks coupled to the bracket. Each of the plurality of blocks has a contact tip. The contact tips are adapted to receive an electrode. Further, at least one of the plurality of blocks is capable of variable positioning relative to the bracket.

Abstract: A method for hardfacing a surface including: depositing a powder (68) having alloy particles onto a surface (70) of a substrate (66); rastering a laser beam (60) across the surface to melt the powder and to form a weld pool (78) having a width (64); directing particles (74) of a material exhibiting a different property than the substrate into the weld pool in a spray pattern having a width less than the width of the weld pool; and establishing the rastering and directing steps such that material circulation within the weld pool is effective to distribute the particles in the weld pool into a pattern having a width greater than the width of the spray pattern prior to re-solidification of the weld pool.

Abstract: Methods for laser additive manufacture are disclosed in which a plurality of powder layers (48, 50 and 52) are delivered onto a working surface (54A) to form a multi-powder deposit containing at least two adjacent powders layers in contact, and then applying a first laser energy (74) to a first powder layer (48) and a second laser energy (76) to a second powder layer (52) to form a section plane of a multi-material component. The multi-powder deposit may include a flux composition that provides at least one protective feature. The shapes, intensities and trajectories of the first and second laser energies may be independently controlled such that their widths are less than or equal to widths of the first and second powder layers, their intensities are tailored to the compositions of the powder layers, and their scan paths define the final shape of the multi-material component.

Abstract: A system and method for submerged arc metal powder welds includes modular programmable control of: a) a weld torch, and the position of the welding wire(s) from the torch traveling within a weld cavity, b) the rate of metal powder and welding flux added to the weld cavity ahead of the weld torch, c) the matching ratio between of metal powder and welding wire within the weld cavity, and d) a square wave welding torch power supply. An embodiment includes a controlled column and boom manipulator with up to six axes of motion and controlled motorized slide assemblies for single or multi-pass welds. A method of use is also disclosed.

Abstract: A flux sheet (20A) and method of using the flux sheet to restore a surface (24) of a metal substrate (26). A laser beam (32) is directed onto the flux sheet to melt it and the surface, then allowed to cool and solidify to produce a restored surface. The flux sheet may be formulated to optically transmit at least 40% of electromagnetic energy from a laser onto the substrate surface. The flux sheet contains a flux composition that may include: a metal oxide, a metal silicate, or both; a metal fluoride; and a metal carbonate. The flux composition may limit the content of certain elements and compounds such as Fe, Li2O, Na2O and K2O. The flux composition may include constituents providing air shielding, contaminant scavenging, viscosity/fluidity enhancement, and optical transmission of laser energy through the flux sheet.

Abstract: In order to provide a nonmagnetic material for producing parts or coatings adapted for highly wear and corrosion intensive applications, said material comprising preformed particles made of tungsten carbide which are embedded in a metal phase made of a Ni-based alloy. It is suggested that the weight portion of said tungsten carbide particles is in the range between 30 wt. % and 65 wt. % and wherein the Ni-based alloy is a Nickel-Chromium-Molybdenum alloy comprising: (in wt. %): Cr 11.0,-30.0? Mo 5.0-25.0? Fe ?0-10.0 B 0-5.0 Co 0-2.

Abstract: Opposing, paired and positionally adjustable serrated water-cooled copper welding shoes, run-off tabs, and sumps affixed at the junction of workpieces to be welded with an Electroslag or Electrogas welding system. The serrated water-cooled copper welding shoes are capable of being controlled between 150 to 200 degrees Fahrenheit, and the welding flux plating over the serrations reduces over-chill to the molten weld puddle while also reducing the amount of heat that the serrated water-cooled shoe removes from the surface of the work piece. This reduction in base material heat allows the welding operator to reduce the weld voltage to dramatically decrease the size of the weld nugget and, in turn, to decrease the heat input from the welding process into the work piece. These significant thermo-dynamic improvements to the Electroslag or Electrogas welding process provide a smaller weld grain structure and much stronger bond in the weld fusion zone.

Abstract: This invention relates to a method and arrangement for manufacturing objects by solid freeform fabrication, especially titanium and titanium alloy objects, wherein the deposition rate is increased by supplying the metallic feed material in the form of a wire and employing two gas transferred arcs, one plasma transferred arc for heating the deposition area on the base material and one plasma transferred arc for heating and melting the feed wire.

Abstract: A submerged arc welding apparatus of the present invention includes: a flux receiver for receiving and holding flux in an area formed by itself and a workpiece inside thereof when abutting against the workpiece on the open side; a flux feeder for supplying flux to the flux receiver; a welding torch for supplying a welding wire toward the workpiece with the tip disposed in the area where the flux is held; and a moving mechanism for moving the flux receiver and the welding torch along the direction of a welding line of the workpiece with the flux receiver abutting against the workpiece. A submerged arc welding method of the present invention includes: performing welding by opposing the welding torch to the workpiece and by moving the welding torch along the direction of the welding line with flux held in an area formed between the workpiece and the welding torch.

Abstract: A method for depositing superalloy materials. A layer of powder (14) disposed over a superalloy substrate (12) is heated with an energy beam (16) to form a layer of superalloy cladding (10) and a layer of slag (18). The layer of powder includes flux material and alloy material, formed either as separate powders or as a hybrid particle powder. A layer of powdered flux material (22) may be placed over a layer of powdered metal (20), or the flux and metal powders may be mixed together (36). An extrudable filler material (44) such as nickel, nickel-chromium or nickel-chromium-cobalt wire or strip may be added to the melt pool to combine with the melted powder to give the superalloy cladding the composition of a desired superalloy material.

Abstract: A preserving apparatus for preserving welded joint portions 7, 8 by deposit welding on the inner surface of the welded joint portions 7, 8, in which a nozzle 4 and a pipe 5 supported under water are joined, the apparatus having: a seal member 9 that is disposed in front and behind the welded joint portions 7, 8 to be deposit welded within the nozzle 4 and pipe 5, and serves to demarcate and form a closed operation area A within the nozzle 4 and pipe 5; water drainage means 12 for draining the inside of the operation area A demarcated and formed by the seal member 9 and obtaining a gas atmosphere therein; and welding means 13 for deposit welding on the inner surface of the welded joint portions 7, 8 within the operation area A in which the gas atmosphere has been created.

Abstract: A method of making a metal art object using a MIG welder to form small and large end puddles having a primarily gold or blue sheen or a center gold dot formed by using combinations of a strip of selected metal and a wire of a selected metal; selectively tilting a surface to form end puddles having a feathered perimeter; randomly obtaining a hole in the end puddle; and affixing at least one, either randomly or non-randomly selected, end puddle to a user-selected media by welding, gluing, or wiring. The blue sheen is obtained by using a strip of stainless steel and a wire of stainless steel. The gold sheen is formed by using a strip of stainless steel and a wire of steel. The center gold dot primary is formed using the first metal of galvanized steel for the strip and the second metal of steel for the wire.

Abstract: This invention relates to a method and apparatus for controlling the composition of a weld. More particularly it relates to welding using an electric circuit, thereby creating a weld puddle, and adding at least one filler that is electrically independent from the electric circuit to the weld puddle at a controllable rate to obtain a target weld composition. The filler can be added to the extent limited by practical weld puddle geometry and, thus, the method and apparatus also facilitate increased weld deposition rates.

Abstract: The present invention concerns the use of a pre-alloyed atomised powder in combination with at least one melting electrode wire in the SAW method. The electrode wire is an unalloyed or low-alloy metal wire and the metal powder is a metal powder containing a higher percentage of alloying elements than the electrode wire.