The invention relates to a process for producing a pipe fitting (10), for example a reduction piece, a pipe elbow or a branch, wherein a metallic material (11) is melted by heating, and wherein a plurality of material layers (12) is produced in a successive manner from the melted material (11), wherein the in each case produced material layer (12) is materially bonded to the in each case previous material layer (12), and wherein the pipe fitting (10) is formed from the material layers (12) bonded to one another. The pipe fitting (10) is produced by buildup welding, for example arc welding or beam welding.

A method of manufacturing a compound object, such as an antenna, is disclosed. The method includes creating, via additive manufacturing, a first component formed at least in part of an oxidizing metal; applying, via vapor deposition, a solderable coating to at least a portion of the first component; and soldering at least a portion of the first component to a second component by applying a solder to the solderable coating of the first component. The oxidizing metal may be a titanium alloy, such as Ti-6Al-4V. The solderable coating may include copper and/or tin-lead.

An arc welding method melts and joins at least a part of a workpiece having a plurality of overlapping non-ferrous metal plates. The arc welding method includes forming a machined hole in a welded portion of the workpiece. The machined hole is a non-through-hole that penetrates a non-ferrous metal plate on an arc-radiation side, and reaches a non-ferrous metal plate on a side farthest from an arc welder to form a partial recess portion. The arc welding method further includes causing arc radiation from an opening side of the machined hole to melt and weld a back surface of the non-ferrous metal plate furthest from the workpiece without using a backing jig on an opposite side of the workpiece.

A brazing-sheet manufacturing method includes superposing a core-material slab on or adjacent to at least one surface of a filler-material slab to form a clad slab, the core-material slab being composed of an aluminum material and the filler-material slab being composed of an AlSiMg series alloy. Then, the clad slab is hot rolled to form a clad sheet having a core material layer composed of the aluminum material of the core-material slab and a filler material layer composed of the AlSiMg series alloy of the filler-material slab. Then, the clad sheet is subjected to one or more passes of cold rolling. Either between cold-rolling passes or after the completion of the cold rolling, a surface of the clad sheet is etched using a liquid etchant that includes one or more inorganic acids. The liquid etchant does not contain fluorine atoms.

Methods for resistance welding, resistance-welded assemblies, and vehicles including resistance-welded assemblies are provided. The method includes providing a workpiece stack-up including first and second workpieces and an intermediate material located between the faying surfaces thereof. At least one of the first workpiece and the second workpiece is formed of a first metal alloy with a first concentration of an alloying element, and the intermediate material is formed of a second metal alloy of the first metal and a second concentration of the alloying element that is less than the first concentration. The method includes bringing electrodes into contact with the workpieces, passing an electrical current therebetween to form a molten weld pool, and cooling the molten weld pool into a weld nugget that forms all or part of a weld joint between the workpieces and has a composition that is a mixture of the workpieces and the intermediate material.

The subject matter relates to a welding device as well as a welding method for producing a material bond connection between a conductor (10) and a connecting part (8), with at least one ultrasonic welding tool (4), wherein at least part of a contact surface (18) of the connecting part (8) contacts at least part of a contact surface (16) of the ultrasonic welding tool (4).

An automated system, method and tool for portable friction welding is disclosed for joining a rotatable workpiece to a substrate. A control system is disclosed receiving a start input to cause a motor to rapidly spin the workpiece and initiate a first thrust building cycle acting through an actuator to progressively force the spinning workpiece against the substrate. The materials at this intersection heat and plasticize and the actuator translates toward the substrate until the end of the desired actuator stroke operates to cut the motor off and to initiate and then hold a second axial thrust cycle on the actuator and there through to the interface of the workpiece and substrate. A reset input at the end of a cool off phase releases the thrust in the actuator.

A welding method includes welding a die cast mould part made of an AlMgFe alloy in a fluid-tight manner to at least one other metal part. A Mg content of 4%Mg4.6% and an Fe content of 1.31%Fe1.7% are used for the aluminum alloy, as well as an admixture content of additional alloying constituents comprising a maximum of 0.2% Si. A blue diode laser is used for welding. No filler metal is used. The welding method may be used to construct an actuator housing.