Abstract: A machine for forming metal bars, in particular for producing ingots made of precious metal such as gold, silver, precious alloys, as well as other pure metals or different alloys, which includes a solidification station provided with a cooling surface having passage holes and being cooled with cooling fluid. The cooling surface being made of copper, aluminium or alloys thereof or other materials suitable for the controlled dispersion of heat and having a sliding surface on which the ingot moulds are inserted and rested. The cooling fluid passes longitudinally and/or transversely to the direction of insertion of said ingot moulds.

Abstract: In a continuous casting method for casting aluminum-deoxidized molten stainless steel 1 by using a continuous casting apparatus 100 in which a long nozzle 3 extending into a tundish 101 is provided at a ladle 2, the molten stainless steel 1 is poured into the tundish 101 through the long nozzle 3, while the spout 3a of the long nozzle 3 is being immersed in the molten stainless steel 1 that has been poured, and the molten stainless steel 1 in the tundish 101 is poured into a casting mold 105. A TD powder 5 is sprayed so that the powder covers the surface of the molten stainless steel 1 in the tundish 101, and nitrogen gas is supplied around the molten stainless steel 1. A calcium-containing material is added to the molten stainless steel 1 in a state other than a state of retention in the tundish 101.

Abstract: An excellent cast and forged product that is superior in mechanical properties and has a microstructure and which may not only be a thin but also be a thick product can be made without using complicated process steps or equipment. A semisolid casting and forging method is provided in which a metal melt is teemed so that it is supercooled into a lower die in a press so controlled that the metal melt has a rate of solidification as desired, thereby preparing a semisolid slurry; an upper die is brought into contact with the semisolid slurry; and thereafter at least one of the upper and lower dies is moved relatively towards the other at a rate of movement between 0.1 and 1.5 m/sec, thereby compressing the semisolid slurry to mold it into a product. The semisolid slurry preferably has crystal grains of a grain size of 50 ?m or less.

Abstract: Various embodiments provide methods in which a metal matrix composite (MMC) material is incorporated into a metallic structure during a one-step near-net-shape structural forming process. Various embodiments provide in-situ selective reinforcement processes in which the MMC may be pre-placed on a forming tool in locations that correspond to specific regions in the metallic structure. Various embodiment near-net-shape structural forming processes may then be executed and result in various embodiment metallic structural components with selectively-reinforced regions that provide enhanced mechanical properties in key locations.

Abstract: A metal powder comprising particles, which contain Fe, Cr, Si and C, and in which when one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta is defined as a first element, and one element selected from the group consisting of Ti, V, Y, Zr, Nb, Hf, and Ta, and having a higher group number in the periodic table than that of the first element or having the same group number in the periodic table as that of the first element and a higher period number in the periodic table than that of the first element is defined as a second element, the first element is contained in a proportion of 0.01% by mass or more and 0.5% by mass or less, and the second element is contained in a proportion of 0.01% by mass or more and 0.5% by mass or less.

Abstract: A powder processing arrangement (10) for use in an apparatus (100) for producing three-dimensional work pieces by selectively irradiating a raw material powder with electromagnetic or particle radiation comprises a carrier element (16) having a build section (46) adapted to carry a raw material powder layer while being selectively irradiated with electromagnetic or particle radiation and at least one transfer section (48a, 48b) adapted to carry the raw material powder prior to being applied to the build section (46) so as to form the raw material powder layer to be selectively irradiated with electromagnetic or particle radiation.

Abstract: Methods for producing additively manufactured products are disclosed. In one embodiment, a method comprises using additive manufacturing to produce an aluminum alloy body, and, after the using step (a), cold working at least a portion of the aluminum alloy body, thereby relieving stress.

Abstract: A method for producing a metal nanoparticle composition including: (a) providing an alloy that includes silver and aluminum; (b) subjecting the alloy to a first thermal treatment to form a thermally treated alloy; (c) cold working the thermally treated alloy to form strips or pellets comprising the alloy; (d) subjecting the strips or pellets to a second thermal treatment at a temperature less than 440° C. to form thermally treated strips or pellets; (e) subjecting the thermally treated strips or pellets to a leaching agent effective to leach out a portion of the aluminum and form a metal nanoparticle composition comprising metal nanoparticles; and (f) washing, filtering, and then drying the metal nanoparticle composition.

Abstract: Provided is a cutting insert (1) exhibiting excellent chip dischargeability under a wide range of cutting conditions, and also being capable of reducing cutting resistance and increasing wear resistance. The cutting insert is provided with: a polygonal top surface (2), a bottom surface (3), a side surface (4), a cutting edge (6) located at the intersection portion of the top surface (2) and the side surface (4), and provided to at least a corner section (5) of the top surface; a through-hole (7) provided from a center portion of the top surface to a center portion of the bottom surface; a projecting portion (9) extending from a corner section (5) to a through-hole (7) side; and a rake surface (8) extending from the corner section (5) between the cutting edge (6) and the projecting portion (9) to the through-hole (7) side.

Abstract: A bit retaining system for a rotary tool or device such as a router is disclosed. The bit retaining system may include a collet assembly and a control assembly. The collet assembly may include a spindle, a collet adapted to receive the bit, and a collet nut. The collet assembly may further include a collet gear mounted on the collet nut and/or a spindle gear mounted on the spindle. The control assembly selectively engages the collet assembly to drive the collet nut and/or secure the spindle in a fixed position, preventing its rotation. In operation, a hand tool is utilized to engage the control assembly. This configuration enables a user to capture and release the rotary tool bit using one hand.

Abstract: A tool for machining fiber-reinforced materials, said tool having a tool body having a particular cutting edge that has at least a main function surface and has a diamond coating applied at least to said main function surface. In order to provide a tool and a method which are especially suitable for machining fiber-reinforced materials, the surface of the diamond coating has a reduced peak height Spk of less than 0.25 ?m.

Abstract: An end milling cutter for heat-resistant superalloys (HRSA) has a shank and a cutting head, which have a common rotation axis, the shank having a connection section for connection to the cutting head and a coupling section for connection to a tool holder, the cutting head consisting of a solid ceramic part, which has a rotationally symmetrical envelope and is butt-joined to an end face of the connection section. In order to keep excessive vibrations and thus stresses low in the interface between the cutting head and the connection section of the milling cutter and to create milling cutters that can also cover the diameter range above 12 mm and in particular above 20 mm and up to 32 mm, the coupling section has a conical peg having an external thread.

Abstract: A cutting insert comprises an upper surface including a first corner, and a second and third corner, respectively, adjacent to both sides of the first corner. The upper surface sequentially includes a rake surface along an upper cutting edge, inclined toward a lower surface, going inward from the upper cutting edge at a rake angle on a basis of a perpendicular plane perpendicular to a central axis extending between the upper and lower surfaces, and a connection surface more inward than the rake surface, inclined toward the lower surface, going inward at a connection angle on the basis of the perpendicular plane. An intersecting part of the rake surface and the connection surface includes a highest position in a portion of the intersecting part corresponding to a minor rake surface. A cutting tool with cutting insert, and a method of producing a machined product using the cutting tool are provided.

Abstract: The invention relates to a groove cutting tool having: a body and a holder wherein the holder is slidably mounted in the body. The holder has a first end at which a blade is mounted and a second end, distal in a slidable direction of the holder, from the first end. A drive pinion, located towards the second end, is configured to be in rotational communication with the blade.

Abstract: A cutter for cutting a formed gutter discharged from a seamless gutter machine. The cutter may be positioned to cut a back wall of a formed gutter below a front upper edge of a front wall of the gutter. In turn, a gutter may be mounted to a building (e.g., a fascia board thereof) to achieve additional lift, thereby providing increased pitch over a given length of gutter while maintaining overlap between a gutter apron and a back upper edge of the back wall of the formed gutter.

Abstract: The present utility model relates to a twin saw blade cutter, improves upon the existing foundation of inner and outer saw blades, small and large output shafts, first and second gearwheels and a power gear shaft, etc., in that the small output shaft is designed with a first annular locking groove and a second annular locking groove located between the first and second gearwheels, a first locking spring which presses against a fifth bearing is mounted in the first annular locking groove, a second locking spring is mounted in the second annular locking groove, and at the same time a flexible piece which arches towards the side of the second locking spring is further sleeved on the small output shaft, the two ends of the flexible piece pressing against the second gearwheel and the second locking spring respectively.

Abstract: A guide carriage for a cutting device for cutting a cylindrical workpiece. The carriage has a tool carrier for the cutting device and a tensioning member which wraps around the workpiece and is guided over a tensioning element. A tensioning device disposed on a chassis acts on the tensioning element. The tensioning device exerts a tensioning force on the tensioning member via the tensioning element. The tensioning member, a belt, is secured non-displaceably on the periphery of the workpiece. The chassis is movable in the peripheral direction of the workpiece along the belt. The belt bears a connecting element, by which the belt is closed. The connecting element is not fully traversable by the guide carriage. In order to be able to execute a full cut over the periphery, the tool carrier enables the cutting device to be mounted in a first and alternatively a second working position.

Abstract: Provided is an internal-gear machining device and an internal-gear machining method capable of offsetting an angle of inclination at a cutter axis using a conventional configuration and performing high-precision machining. The internal-gear machining device gear cuts a workpiece with a pinion cutter by feeding and causing the pinion cutter to cut while synchronously rotating the pinion cutter and the workpiece in mesh with each other, wherein prior to gear cutting, the pinion cutter is positioned so that a cutter axis is parallel shifted within a XY plane in accordance with the angle of inclination of the cutter axis, and a meshing position of the pinion cutter and the workpiece is shifted in a cutter rotational direction.

Abstract: A method for manufacturing a rotor includes the following operations: the clamping of a workpiece in a grinding machine; the performance of one or more cylindrical grinding operations whereby a rotor shaft section is ground to the desired diameter with a cylindrical grinding disk; the performance of one more profile grinding operations whereby a rotor body is profiled with a profile grinding disk. During the manufacture of the rotor in the grinding machine, the workpiece is not undamped and the cylindrical grinding operations and the profile grinding operations are done with the same grinding machine.

Abstract: A measurement program for sequentially measuring measurement points, which are to be measured with a touch sensor, is created on the basis of a machining program, which is read in, for machining a turning tool. Then, the rake face height is measured on each of the measurement points and the measurement data is stored. Subsequently, a calculation method of a correction amount is selected so as to calculate the correction amount, and whether or not the calculated correction amount is smaller than a regulation value is determined. The machining program is modified on the basis of the correction amount when the correction amount is not smaller than the regulation value, while the machining program is modified on the basis of the correction amount in accordance with the selected method when the correction amount is smaller than the regulation value.

Abstract: The application refers to a wire electrode (3) for electrical discharge machines. The inventive wire electrode includes a core (1)—preferably made of copper, brass, molybdenum, tungsten or steel—and a coating (2), which contains according to the invention graphene.

Abstract: A method for forming a brazed joint between a first part having a first surface and a second part having a second surface may comprise applying at least two beads of braze filler at either of the first surface and the second surface, and assembling the first surface and the second surface to define a shiplap interface therebetween. The shiplap interface may terminate at a first terminus and a second terminus, and may include a first cavity and a second cavity. One of the beads of braze filler may be localized at the first cavity and the other may be localized at the second cavity. The method may further comprise melting each of the beads of braze filler to a braze liquid, and allowing the braze liquid to flow through the shiplap interface from the first cavity towards the first terminus, and from the second cavity towards the second terminus.

Abstract: A method for producing a material-bonding metal-ceramic soldered connection of an uncoated ceramic body to a metal part uses a metallic solder and begins by choosing the metal part with a 50% fraction of an oxygen-affine element; choosing the ceramic body with at least 80% aluminum oxide, zirconium oxide, silicon oxide or an alloy thereof; choosing an inactive, eutectic or near-eutectic solder; and forming a structure with the ceramic body and the metal part with an intermediate space between the their opposing surfaces. The solder is introduced into the intermediate space or the vicinity thereof. The structure is heated in a vacuum at a soldering temperature (T) greater than the liquidus temperature (TL) of the solder for a soldering period. The connection is applied between a ceramic bushing and a high-temperature sensor.

Abstract: An arrangement (10) for the reproducible application of small amounts of liquid onto a target surface, comprising a liquid reservoir (28, 38) with an opening (24) which can be positioned above the target surface, a plunger (52, 60) which is arranged so as to be movable in an opening direction, and a drive (14) for moving the plunger, is distinguished by the fact that the opening (50) is formed in a projecting, tapering tip or nozzle (48), and the plunger (52, 60) extends all the way through the liquid (70) situated in the liquid reservoir (28, 38) and into the tip or nozzle (48), such that during a plunger movement in an opening direction, liquid portions in the opening region are moved outward through the opening by the plunger.

Abstract: The invention relates to an arrangement of at least two solder-wettable separating strips (6, 7) for a soldering nozzle, for simultaneous wave soldering of rows of soldering points, said rows being arranged so as to be spaced apart. The invention is distinguished by the fact that the depth of the separating strips (6, 7), along the solder influx direction, amounts to at least a multiple of the thickness of the separating strips (6, 7), in order to carry away excess solder from the soldering points by means of surface tension by transfer to the separating strips (6, 7); and also by the fact that the at least two separating strips (6, 7) are oriented exactly parallel to one another and are connected fixedly as a group of separating strips (6, 7) to form a strip assembly (2). The invention makes it possible to carry out wave soldering with a repeatably high quality and also without the formation of solder bridges even in the case of circuit board structures with a very fine pitch.

Abstract: The invention relates to a method of making a steel Yankee cylinder 1 by welding a cylindrical shell 2 to two end walls 3, 4 such that the cylindrical shell 2 and the end walls 3,4 together form the Yankee cylinder 1. The welding operation is carried out exclusively from the outside of the Yankee cylinder 1 and in the welding operation is carried out as a butt welding operation in which a backing material 7 is used on the inside of the Yankee cylinder 1 such that, between each end wall 3, 4 and the cylindrical shell 1, a single weld bead 8 is formed which extends all the way between the opposing surfaces 5, 6 and completely fuses the opposing surfaces 5, 6 of each end wall 3, 4 and the cylindrical shell 2 respectively.

Abstract: Welding circuits including superposition elements that charge and discharge to assist with re-establishing a welding arc between an electrode and a workpiece after the arc is extinguished when a welding output current polarity changes are described.

Abstract: An interface device may be configured to be worn by a user during welding operations, and may also be integrated into an article of clothing or equipment. The interface device may support a first mode of operation for interfacing with welding equipment and a second mode of operation for interfacing with weld monitoring equipment. The interface device also may setup a first wireless connection with the welding equipment and a second wireless connection with the weld monitoring equipment. The interface device may interface with the welding equipment over the first wireless connection when configured into the first mode of operation, and interface with the weld monitoring equipment over the second wireless connection when configured into the second mode of operation. The interface device may operate in response to user input received via a user interface.

Abstract: A connector component (102) is provided for assembly into a material processing torch head. The connector component (102) comprises a generally cylindrical body (104) that includes a proximal end (106) and a distal end (108) defining a longitudinal axis. At least two thread regions (112) are disposed at a radial location on a surface of the body near the proximal end. Each thread region includes at least one thread (114) disposed on the surface of the body. In addition, at least two non-thread regions (116) are oriented longitudinally at a radial location on the surface of the body (104).

Abstract: By superposing a plurality of steel sheets including a high tensile steel sheet and performing pulsation conduction by an inverter DC type spot welding power supply and controlling the conduction time of the current pulses, intervals of the current pulses, that is, conduction idle time, and weld current applied at the current pulses in a variable manner, the optimum weld conditions are obtained. For resistance spot welding of the hot stamped steel sheet, resistance spot welding with a minimum weld current of a second pulsation step higher than the maximum weld current at a first pulsation step is used to suppress the occurrence of outer spatter and inner spatter and secure a broad suitable current range even if using an inverter DC power supply.

Abstract: A resistance welding method comprises firstly lapping weldments in an up-down crossing manner or an overlapping manner, and then prepressing two electrodes in the same direction onto a top-layer weldment to form a current loop. A pressurization sheet made of a high resistance high-temperature resistant material which is parallel to the electrodes and is capable of moving upward and downward and applying a pressure to the welding position is arranged on the same side of the electrodes and between the two electrodes. The welding comprises the following steps: switching on a power supply of a welding machine, generating, by the current, resistance heat in the top-layer weldment to heat the top-layer weldment to a melting or plastic state; applying, by the pressurization sheet, a pressure to the top-layer weldment; cooling to crystallization; releasing the pressure applied by the pressurization sheet and the two electrodes and taking out the weldment.

Abstract: There is disclosed a method for the production of a three-dimensional product (2) via an additive layer manufacturing process such as an electron beam manufacturing process to selectively fuse parts (17) of a powder bed (16), said parts (17) corresponding to successive cross-sections of the product (2). The method involves the use of said additive layer manufacturing process to form a tool (12) by selectively fusing additional parts (18) of the powder bed (16), said additional parts (18) corresponding to successive cross-sections of the tool (12). The method also comprises a subsequent step of manipulating the tool (12) perform a processing function on the product (2).

Abstract: A method of making a downhole servicing tool comprising explosively welding a corrosion resistant material to a corrodible surface of the downhole servicing tool to yield a coated surface, wherein the coated surface comprises an explosively-welded corrosion resistant material.

Abstract: A piston shoe as a sliding component includes a base section, which is made of steel, and a sliding section having a sliding surface, which is made of copper alloy and joined to the base section. The base section and the sliding section are joined, with a base section joint region being formed in the base section, the base section joint region including a base section joint surface that is a surface joined to the sliding section and having smaller grains than other regions in the base section.

Abstract: A pressure welding device (1) and a pressure welding method are provided. The pressure welding device (1) includes a plastification unit (5), a positioning and compressing unit (6), a controller (26), and an advance unit (7) for a workpiece (3) and for the process axis (13). The advance unit (7) has an open- or closed-loop controllable hydraulic advance drive (12) that is formed as an open- or closed-loop controllable electro-hydraulic direct drive for the process axis (13).

Abstract: A friction welding process includes: providing a first workpiece having a first weld surface, and a second workpiece having a second weld surface; aligning the workpieces with the weld surfaces facing each other, moving one workpiece relative to the other workpiece, and engaging the first and second weld surfaces such that the movement raises the temperature at the weld surfaces to create a weld interface; and ceasing the movement and allowing the weld interface to cool to weld the workpieces together at the interface. The first workpiece has a plurality of flash removal channels formed in and/or adjacent to the first weld surface. The channels provide pathways for ejection of material from the weld interface during welding.

Abstract: Provided is a method and tool for butt welding a first material piece of metal to a second material piece of metal at opposed longitudinal edges. The second material piece has a greater material thickness than the first material piece. The first material piece has a higher tensile strength and/or a higher melting temperature and/or a higher yield strength and/or a higher modulus of elasticity than the second material piece. A thickened longitudinal edge is provided at the first material piece. The thickening of the longitudinal edge is at least partly produced by at least simple folding, beading or winding of the first material piece or at least partly by beveling the first material piece at its edge. The two material pieces are friction-stir welded at their front along the opposed longitudinal edges.

Abstract: A process of pre-heating treatment is performed such that steel sheets or plates as working materials are heated by a heating unit provided ahead of a rotational tool moving in a welding direction to precisely control the surface temperature, area, position and the like of a heating region in the process of pre-heating treatment when performing friction stir welding on structural steel.

Abstract: A laser processing machine includes a machine main body that has a laser processing head, a processing table on which a workpiece to be processed is laid; and a light-shielding cover that is provided above the processing table, and covers an upper surface of the processing table. The cover is transformable between a deployed state and retracted state, and can adjust an area covering the upper surface of the processing table. According to the laser processing machine, it is possible to cover only a necessary area for laser processing by its compact cover without inhibiting workability for carrying in/out the workpiece.

Abstract: A method for producing a hexagonal single crystal wafer from a hexagonal single crystal ingot includes a separation start point forming step of setting the focal point of a laser beam inside the ingot at a predetermined depth from the upper surface of the ingot, which depth corresponds to the thickness of the wafer to be produced, and next applying the laser beam to the upper surface of the ingot while relatively moving the focal point and the ingot to thereby form a modified layer parallel to the upper surface and cracks extending from the modified layer along a c-plane in the ingot, thus forming a separation start point. The ingot is immersed in water after forming the separation start point in the ingot, and ultrasonic vibration is applied to the ingot to thereby separate a plate-shaped member corresponding to the wafer from the ingot.

Abstract: A hexagonal single crystal wafer is produced from a hexagonal single crystal ingot. The wafer producing method includes a separation start point forming step of setting the focal point of a laser beam having a transmission wavelength to the ingot inside the ingot at a predetermined depth from the upper surface of the ingot. The separation start point forming step includes a first step of forming the separation start point with a first power and a second step of setting the focal point at the modified layer previously formed in the first step and then applying the laser beam to the ingot with a second power higher than the first power at an increased repetition frequency in the condition where the energy per pulse of the laser beam is the same as that in the first step, thereby separating the cracks from the modified layer.

Abstract: A crystal wafer is produced from a hexagonal crystal ingot. A separation start point is formed by setting the focal point of a laser beam inside the ingot at a predetermined depth, which depth corresponds to the thickness of the wafer to be produced. The laser beam is applied to the upper surface of the ingot while relatively moving the focal point and the ingot to form a modified layer parallel to the upper surface of the ingot and cracks extending from the modified layer along a c-plane in the ingot, thus forming the separation start point. First the laser beam is scanned from a scanning start point to a scanning end point on the ingot. Then the laser beam is scanned from the scanning end point to the scanning start point. The first and second steps are alternately repeated to separate the cracks from the modified layer.

Abstract: A method and a laser assembly process a work piece using a pulsed laser beam. In the method, during processing the lateral distribution of the spectral phase is varied non-linearly over the duration of a laser pulse and/or at least between two laser pulses that at least partially overlap on the work piece.

Abstract: A method for monitoring the energy density of a laser beam using parameters of the laser beam including regularly applying the laser beam to a reference substrate and measuring, with each application, the resulting light intensity; identifying a change in the light intensity on the reference substrate between at least two measurements; and, when the change in the light intensity is higher than a predetermined threshold, determining the unstable parameter or parameters of the energy density of the laser beam.

Abstract: Laser processing systems and methods are capable of moving a laser beam while maintaining consistent laser beam characteristics at processing locations. The laser processing systems generate a collimated laser beam having a consistent Z axis power density along at least a portion of a length of the laser beam and dither the collimated laser beam along one of the X and Y axes. The dithering of the collimated laser beam facilitates consistent laser processing on a three-dimensional surface, for example, to provide consistent deposition of a coating in a laser cladding process. A laser processing system may include a beam delivery system that provides both the collimation and the dithering of the collimated laser as well as an adjustment of the beam diameter of the collimated beam.

Abstract: A laser welding method of the present invention is a laser welding method for irradiating with a laser beam a groove portion 6 formed along a circumferential direction by butting axial end portions of cylindrical bodies 5a, 5b together to weld the groove portion, the method comprising: a welding process S2 of irradiating the groove portion 6 with the laser beam over the entire circumference to weld the groove portion; and a strain correction process S4 of irradiating the groove portion 6 with the laser beam over the entire circumference, the laser beam having a heat input amount smaller than a heat input amount per unit area of the laser beam emitted in the welding process S2.

Abstract: A method for depositing clad material (24) onto a substrate (10) by melting a layer of powdered material (16) using an energy beam (20), and also applying vibratory mechanical energy (27, 29 and/or 31). The vibratory mechanical energy may be applied before, during or after the melting and solidification of the powdered material in order to preheat the powder, to distribute powder over a top surface (18) of the substrate, to control the formation of dendrites in the clad material as the melt pool (22) solidifies, to remove slag, and/or to perform stress relief. Simultaneous application of beam energy and vibratory mechanical energy facilitates the continuous deposition of the clad material, including directionally solidified material.

Abstract: A disclosed method includes the steps of generating at least one ultrasonic standing wave (6?) between at least one set of mutually-opposed ultrasonic transducers (20A, 20B), dispensing metal-containing particles (22, 24, 26) into a node (14) located within the ultrasonic standing wave such that the particles are trapped in the node, positioning a surface of a substrate (160) proximate to the node, melting the particles with an energy beam to form a melt pool (170) in contact with the surface, and allowing the melt pool to cool and solidify into a metal deposit (176) bound to the surface. Apparatuses for carrying out such methods are also disclosed.

Abstract: Particular aspects provide novel devices for bone tissue engineering, comprising a metal or metal-based composite member/material comprising an interior macroporous structure in which porosity may vary from 0-90% (v), the member comprising a surface region having a surface pore size, porosity, and composition designed to encourage cell growth and adhesion thereon, to provide a device suitable for bone tissue engineering in a recipient subject. In certain aspects, the device further comprises a gradient of pore size, porosity, and material composition extending from the surface region throughout the interior of the device, wherein the gradient transition is continuous, discontinuous or seamless and the growth of cells extending from the surface region inward is promoted.

Abstract: The invention relates to a welding device (1), in particular a laser welding device, for welding metal workpieces (3) by means of at least one welding head (2), in particular a laser welding head, which defines a working area (4). The welding device is characterized by at least one heating device (5) which acts on the working area (4) to heat up the workpiece (3), in particular before and/or after the welding process.