56 results about "Diffusion welding" patented technology

This invention relates to a welding assembly device suitable for the automatic separation of multi-layer diffusion welding. It includes a welding fixture and an automatic lifting device. The welding fixture has positioning keys on both end faces and a stop block on its rear end face. The lifting system of the automatic lifting device includes a wire rope, a top plate, guide bars, and length-fixing screws. The wire rope is suspended from the upper end face of the top plate. Multiple guide bars are vertically distributed on the lower end face of the top plate, with adjacent guide bars connected by length-fixing screws. The positioning system of the automatic lifting device includes positioning pins and a flip-positioning block. The guide bars are positioned and installed using positioning pins and positioning keys. The flip-positioning block is rotatably installed on the crossbeam of the frame and cooperates with the stop block to achieve the positioning of the parts to be welded. The purpose of this welding assembly device for the automatic separation of multi-layer diffusion welding is to solve the problems of high strength and low efficiency in the handling methods of existing welding fixtures.

This invention discloses a rapid, high-strength microwave bonding method for ceramics and cemented carbide, belonging to the field of ceramic material bonding technology. The method includes the following steps: preparing a metal solder; grinding, polishing, and cleaning the bonding surfaces of the ceramic and cemented carbide respectively; loading the prepared metal solder into a mold and pressing it under uniaxial pressure to obtain a metal solder sheet; placing the ceramic, metal solder sheet, and cemented carbide in a stacked structure in a microwave sintering furnace for microwave sintering to achieve the bonding of the ceramic and cemented carbide. Compared with traditional brazing and diffusion welding, this ceramic-cemented carbide microwave bonding method increases the heating / cooling rate by 6-10 times, improves the single-furnace bonding efficiency by 5-9 times, allows for mass production, and yields ceramic-cemented carbide bonding interfaces with high strength. This invention significantly improves production efficiency, reduces energy consumption, and has widespread application value.

The application discloses a cylindrical dissimilar composite material diffusion welding device and method, which comprises a sealed shell, a vacuum assembly in communication with the sealed shell, a heating assembly arranged on the sealed shell, a centrifugal pressure assembly arranged in the sealed shell and rotationally matched with the inner wall of the sealed shell, and a transmission assembly connected with the sealed shell, wherein the power output end of the transmission assembly extends to the inside of the sealed shell through the side wall of the sealed shell and is in transmission connection with the centrifugal pressure assembly. Compared with the prior art, the application can overcome the shortcomings of uneven radial pressure distribution of the pipe material, deformation of the tubular structure caused by mechanical rigid extrusion, and difficulty in considering the high-temperature and high-vacuum operation environment of the complex mechanical pressure die, improve the diffusion bonding quality of the material interface, enhance the size precision of the pipe material forming, and improve the running stability of the welding device under an extreme heat field.

This invention discloses a magnesium alloy cold plate with integrated titanium alloy flow channels and its preparation method. The magnesium alloy cold plate with integrated titanium alloy flow channels includes a first magnesium alloy plate and titanium alloy pipes. A cavity is provided in the upper part of the first magnesium alloy plate. The titanium alloy pipes are embedded in the cavity after being covered with aluminum foil. The external dimensions of the titanium alloy pipes after being covered with aluminum foil match the internal dimensions of the cavity. A second magnesium alloy plate is positioned and covered at the upper end of the first magnesium alloy plate. The first magnesium alloy plate, titanium alloy pipes, aluminum foil, and second magnesium alloy plate are connected by instantaneous liquid phase diffusion welding. This invention uses instantaneous liquid phase diffusion welding and pressure and relatively low temperature as the main driving forces for the connection between magnesium alloy and titanium alloy. The addition of aluminum foil as an intermediate layer adjusts the welding interface reaction and promotes element diffusion, thereby strengthening the microstructure and mechanical properties of the joint. This is beneficial to improving the shear strength of the welding interface, and thus significantly improving the mechanical environmental adaptability and long-term operational reliability of the cold plate.

This invention discloses an integrated continuous heat treatment equipment and method for diffusion welding and controlled quenching in dissimilar metal joining, relating to the field of metal component manufacturing technology. The equipment includes a multi-parameter composite sensing unit, a central intelligent control unit, a diffusion welding furnace, a rapid quenching furnace, and a vacuum / atmosphere-locked transition chamber connecting the diffusion welding furnace and the rapid quenching furnace; the vacuum / atmosphere-locked transition chamber is equipped with a workpiece intelligent transfer unit. This invention, by constructing a dual-furnace continuous processing system integrating diffusion welding and controlled quenching, and integrating intelligent closed-loop control, fundamentally solves common problems in dissimilar metal joining, such as process dispersion, incompatibility with the base material heat treatment regime, limited cooling rate, and reliance on manual experience.

This application discloses a relay contact, a relay, and a vehicle, belonging to the field of relay technology. The relay contact includes: a first sub-contact, which is made of copper and has a first connecting portion; and a second sub-contact, which is made of aluminum and has a second connecting portion, and the second sub-contact is provided with a heat dissipation structure; the first connecting portion and the second connecting portion are welded together, and the welded area between the first connecting portion and the second connecting portion is a zigzag shape. According to the relay contact provided in the embodiments of this application, by connecting the first sub-contact made of copper and the second sub-contact made of aluminum through diffusion welding, and providing a heat dissipation structure on the second sub-contact, reliable connection between the second sub-contact and other electrical components or external electrical components can be achieved, the connection strength between the first sub-contact and the second sub-contact can be enhanced, and heat dissipation of the contact can be optimized.

The application discloses a titanium-based interlayer for titanium-aluminum heteroalloy diffusion welding and a preparation method and application thereof, and belongs to the field of hetero-metal diffusion welding. The interlayer is composed of the following components in percentage by mass: 72.7% to 83.1% of Ti, 13.5% to 14.8% of Mo and 2.1% to 13.8% of Ta, and the sum of the percentage by mass of the above components is 100%. The application can improve the oxidation resistance of a diffusion welded joint, realize high-quality and high-performance diffusion welding of a TiAl / Ti2AlNb composite component, and meet the design index and the reliability requirement.

This utility model discloses an assembly structure and radiator for a 3DVC heat pipe and a VC cover plate. The assembly structure includes: a cover plate with a plurality of assembly holes arranged in an array, extending through both sides of the cover plate; several heat pipes, each with a flange at one end, corresponding to a mounting hole; the flanged end of the heat pipe is fitted into the mounting hole and fitted against one side of the cover plate; the flange and cover plate are fixedly connected by diffusion welding. This utility model, by providing assembly holes on the cover plate, a flange at one end of the heat pipe, and limiting the heat pipe's position by fitting it into the assembly hole and the flange against the cover plate, and forming a complete weld through diffusion welding, avoids the traditional production process of welding in a small space. This avoids problems such as incomplete welds and missing weld rings, improves welding quality, and allows for mass production, effectively increasing production efficiency and capacity.

The application discloses a kind of by dynamic phase coupling electromagnetic field device auxiliary vacuum diffusion welding method, belong to metal material solid-phase welding technical field.The method aims at solving the problems, such as grain coarsening, joint performance decline and heterogeneous material welding uneven caused by high temperature and long time heating in traditional diffusion welding process.The core scheme includes: (1) surface treatment, clamping positioning and vacuum pretreatment are carried out to the workpiece to be welded;(2) double-band nested induction coil structure is used, and pulse current module is loaded cooperatively, three-module electromagnetic field is realized by FPGA chip dynamic phase coupling, and periodic oscillation electromagnetic pressure field is formed;(3) based on convolution neural network model, parameters are real-time regulated during welding process, and interface diffusion behavior is optimized.The application realizes deep cooperation of pulse joule heat and induction eddy current heat through dynamic phase coupling mechanism, significantly reduces welding temperature and shortens welding time, is especially suitable for high-quality connection of copper alloy, molybdenum alloy and other heterogeneous materials, the joint tensile strength is improved, and the structure is uniform, corrosion resistance is excellent.

This invention discloses a method for enhancing thermoforming diffusion welding capability using electric field energy. This method, based on the thermoforming diffusion welding temperature, pressure, time, and atmospheric conditions, applies a pulsed current to the diffusion surface in a quasi-perpendicular manner. It fully utilizes the electron migration effect to excite the activity of metal atoms, increasing the energy potential of metal atoms across the welding surface, thereby effectively enhancing the thermoforming diffusion welding capability. This method provides a novel technical means for thermoforming diffusion welding under existing technological conditions.

This application discloses a Ti55 / CuAlMnTiTa dissimilar alloy welded joint and its vacuum diffusion welding method, belonging to the field of dissimilar alloy welding technology. The diffusion welding method includes the following steps: pre-treating the surfaces of Ti55 titanium alloy and CuAlMnTiTa alloy to obtain surfaces to be joined with different surface roughnesses; overlapping the two surfaces to be joined and performing diffusion welding under vacuum hot pressing conditions; cooling to obtain the Ti55 / CuAlMnTiTa dissimilar alloy diffusion welded joint. This application achieves a reliable connection between the high-strength Ti55 titanium alloy and the high-damping CuAlMnTiTa alloy through vacuum diffusion welding, effectively solving the problems of low diffusion welding rate and unstable quality in dissimilar alloys. The resulting joint interface is free of pores, with high bonding quality, meeting the needs of the aerospace field for high-strength and multifunctional components.

This invention belongs to the field of special ceramics preparation technology, and provides a solderless diffusion-welded reaction-sintered silicon carbide special ceramic component and its preparation method. The invention involves mixing silicon carbide, a carbon source, a pore-forming agent, and metallic silicon powder, granulating the mixture, and cold isostatically pressing it to obtain a green body. Microgrooves are then machined on the end face to be welded. Subsequently, a suspension is vacuum impregnated and coated with a suspension containing mesophase carbon microspheres to construct an interface gradient layer. Finally, the component is aligned, assembled, and subjected to axial load, and the process is completed through reaction sintering. This invention utilizes the capillary pressure difference generated by laser microtexturing and pore gradient to induce the directional migration of liquid-phase silicon from the matrix to the interface. Through the in-situ reaction of liquid-phase silicon with the carbon source, a continuous silicon carbide solid-phase network is generated, physically blocking the outward diffusion channels of the liquid-phase silicon, achieving self-locking and densification of the welding interface. Specifically, this invention can be applied to special ceramic products such as ceramic valves and ceramic cylinder valve plates.

The application discloses a TC4 titanium alloy low-temperature diffusion welding method based on double nanocrystallization and high-entropy alloy interlayer and belongs to the technical field of welding. The application adopts ultrasonic rolling to process TC4 titanium alloy base material, obtains nanocrystallized TC4 titanium alloy base material, adopts a high-entropy alloy interlayer composed of Ti 35%, Zr 25%, Co 10%, Ni 10%, Cu 7%, Nb 10% and Y 3% and is nanocrystallized, finally, the nanocrystallized high-entropy alloy interlayer is arranged in the middle of the nanocrystallized TC4 titanium alloy base material to perform diffusion welding, and a TC4 titanium alloy welded joint is obtained. The application successfully connects the TC4 titanium alloy by using the nanocrystallized high-entropy alloy interlayer, the obtained weld is defect-free, and high-quality strong-tough diffusion connection of the TC4 titanium alloy is realized.

The present disclosure provides an intermediate alloy and a preparation method therefor, and use thereof. The preparation method of the intermediate alloy includes the following steps: S1, performing stranding by taking a wire material of a doping element as a core material and taking a base material wire as a peripheral stranding wire to obtain a first stranding wire; S2, performing diffusion welding on the first stranding wire in a vacuum environment or under a protection of an inert atmosphere, so that a metallurgical bonding is formed between the wire material of the doping element and the base material wire, so as to obtain a second stranding wire; and S3, drawing the second stranding wire to obtain an intermediate alloy wire.

This utility model belongs to the field of copper busbar production technology, specifically relating to a shaping device after diffusion welding of copper flexible connectors. It includes a shaping chamber, inside which are an active roller and a driven roller, both horizontally positioned. The driven roller is positioned above the active roller. Both ends of the active roller are externally connected to drive components for rotating it. Both ends of the driven roller are equipped with lifting components. The purpose of this device is to allow the hot-pressed copper foil to be sandwiched between the active and driven rollers. Then, the active roller begins to rotate. Through the interaction between the active and driven rollers and the action of friction, the copper foil is moved forward at a uniform speed. During this process, the welded area and surrounding region of the copper foil are subjected to uniform pressure, effectively flattening the copper foil.

This invention relates to a silicon carbide hollow structure, its preparation method, and its application. The preparation method of the silicon carbide hollow structure includes the following steps: (1) uniformly mixing silicon powder and silicon carbide powder, and then molding the resulting mixed powder to obtain a silicon-silicon carbide blank; (2) processing two silicon-silicon carbide blanks obtained in step (1), then molding them, and then performing hot-press diffusion welding. The resulting assembly is then post-processed to obtain the silicon-silicon carbide hollow structure. This invention achieves the integral molding of complex irregular hollow structures, while reducing the deformation after hot-press diffusion welding and increasing the strength of the weld joint, thus meeting the requirements for structural components used in integrated circuit equipment or materials used in photovoltaic chips.

The utility model discloses a kind of quenching and heating cooling core structure, including plastic mould body, mould core, conformal waterway device, the plastic mould body is formed by machining, at least three mould cores are installed on plastic mould body, conformal waterway device is installed on mould core, the conformal waterway device is processed using diffusion welding process, conformal waterway device is equipped with multiple groups, the conformal waterway device includes inlet and outlet pipe, conformal waterway, first fixed plate, second fixed plate, inlet and outlet pipe are symmetrically arranged along conformal waterway, inlet and outlet pipe are connected with conformal waterway, at least two conformal waterways are installed on each group of inlet and outlet pipe, conformal waterway is arranged along mould core according to need, first fixed plate is installed below inlet and outlet pipe, second fixed plate is installed below one place of conformal waterway.The utility model design is reasonable;Conformal waterway can bear quenching and heating after diffusion welding processing to eliminate product appearance fusion line.

Disclosed in the present application are a diffusion-welded heat exchanger and a design method therefor, the diffusion-welded heat exchanger comprising several stacked heat exchange plates, wherein a

The utility model relates to welding equipment technical field discloses laminated flexible connection high pressure diffusion welding equipment, including the cabinet, the lower part four corners of cabinet all are fixedly connected with support leg, the front both sides of cabinet all are rotatably connected with the cabinet door, the inside of cabinet and cabinet door is equipped with the uniformly distributed heat dissipation hole, the right side fixed connection of cabinet has processing subassembly, processing subassembly is used for carrying out automatic processing treatment to work piece, the back side fixed connection of cabinet has the bearing plate, the upper right side fixed connection of bearing plate has first air -ejector pump. In the utility model, realize the high pressure diffusion welding at lower temperature, effectively avoid the metal overheating, deformation or material performance loss that may cause in the welding process, and realize the work piece can get stable and accurate fixed, ensure that work piece does not occur displacement in the processing or other operation process.

The utility model relates to a kind of continuous diffusion welding equipment, comprising: feeding unit, including feeding conveyor;Discharge unit, including discharge conveyor;Processing unit, the processing unit includes tunnel furnace and cooling tunnel connected, the tunnel furnace is equipped with pressurizing mechanism, the inside of tunnel furnace and cooling tunnel is equipped with tray conveying device;Circulating conveying unit, the circulating conveying unit includes circulating conveyor belt;Wherein, the both ends of the tray conveying device are connected with the feeding conveyor and discharge conveyor respectively, the both ends of the circulating conveyor belt are connected with the feeding conveyor and discharge conveyor respectively, so that the feeding unit, processing unit, discharge unit and circulating conveying unit are sequentially connected in order, form continuous circulating processing line.The utility model degree of automation is high, can effectively guarantee the safety of welding worker, and can realize continuous uninterrupted circulating processing effect, improve production efficiency.

This invention relates to the field of welding technology, specifically to a rotary rolling mill for refining grain-type diffusion welding of metals and a method thereof. The apparatus includes a rotary rolling mill, a rotary rolling head, a liquid medium fixture, and a welding fixture. The rotary rolling mill includes a bed and a power head and a two-dimensional moving platform mounted on the bed. The power head is located above the two-dimensional moving platform and has rotational and Z-axis movement degrees of freedom. The two-dimensional moving platform has X and Y-axis movement degrees of freedom. The liquid medium fixture is mounted on the two-dimensional moving platform and is used to fix the workpieces to be welded, while simultaneously providing a liquid medium to the friction interface of the workpieces. The rotary rolling head is mounted on the power head and is used to rotary roll the surface of the workpieces to be welded, achieving grain refinement of the metal surface. The welding fixture is used to clamp and fix the two workpieces to be welded after the metal surface grain refinement has been completed. This invention achieves low-temperature, low-deformation, high-weld-ratio, and low-cost diffusion bonding.

This utility model discloses an acoustic emission probe for detecting cracks in gas turbine blades, relating to the field of acoustic emission probe technology. It includes an electromagnetic shielding shell, with a layered sensing unit disposed on the top of the inner wall of the shell. The layered sensing unit comprises a lithium niobate piezoelectric single crystal wafer, a porous zirconia buffer layer, and an aluminum nitride coupling layer. The lithium niobate piezoelectric single crystal wafer, the porous zirconia buffer layer, and the aluminum nitride coupling layer are connected by vacuum diffusion welding. The polarization direction of the lithium niobate piezoelectric single crystal wafer is perpendicular to the blade surface. A curved adaptive substrate is disposed at the bottom of the aluminum nitride coupling layer. The lithium niobate piezoelectric single crystal wafer can still function normally at high temperatures. Vacuum diffusion welding prevents adhesive layer failure. The curved adaptive substrate perfectly fits the blade surface with different curvatures, ensuring the long-term stability and reliability of the probe.

This invention provides a polymer diffusion welding device for steel-aluminum composite bars, belonging to the field of welding equipment technology. It includes a machine body with a welding auxiliary assembly on one side. The welding auxiliary assembly consists of a fixing assembly and a feeding assembly. The feeding assembly includes a mounting plate fixedly connected to one side of the machine body. Multiple movable bolts are slidably connected to one side of the mounting plate, and a movable connecting plate is slidably connected to one side of the mounting plate on the outer side of the multiple movable bolts. This invention uses the welding auxiliary assembly to specifically fix and adapt multi-layer materials such as steel and aluminum, and can feed materials to the required dimensions, ensuring the neatness and welding accuracy of the welded metal materials. This results in a neat rectangular outline after welding, meeting the required welding length, thereby improving welding efficiency. Furthermore, this device has a low cost, meeting the demand for low-cost solutions.

The application discloses a liquid cooling plate diffusion welding cooperative regulation and control pressing device and a use method thereof, relates to the technical field of diffusion welding, and the liquid cooling plate diffusion welding cooperative regulation and control pressing device comprises a horizontally arranged mounting plate, and the bottom surface of the mounting plate is uniformly provided with a plurality of downward pressing components; the downward pressing components are vertically arranged, and the bottom end of the downward pressing components is horizontally provided with a pressing head; the bottom surface of the pressing head is in the shape of a close-packed pattern, the adjacent surfaces of adjacent pressing heads can be attached together, so that the plurality of pressing heads can be combined into a horizontal and continuous pressing surface; lifting components are symmetrically arranged around the mounting plate, and the lifting components are staggered with the downward pressing components; the technical effect that the attachment of the pressing head and the plate surface of the liquid cooling plate can be improved, and the pressure on each region of the liquid cooling plate is more uniform is achieved.

The application discloses a Ti2AlNb / GH536 dissimilar material interface melting welding method and belongs to the dissimilar alloy welding field. The application aims at solving the problems of the brittle phase and the stress concentration caused by the too large difference of the thermal expansion coefficients of the dissimilar metals during the welding process. The application adopts the gradient nanocrystalline intermediate layer Ni / Nb and the Ag and SPS technology to perform diffusion welding on the GH536 alloy and the Ti2AlNb alloy, utilizes the gradient intermediate layer to relieve the difference of the thermal expansion coefficients of the two base materials and reduces the generation of the brittle phase during the welding process. Since the joint stress is relieved, the mechanical properties of the joint are ensured to be close to the base material. In addition, the nanocrystalline can promote the element diffusion by increasing the grain boundary quantity, reduces the welding temperature, and thus realizes the reliable welding of the joint with low temperature, small deformation and high strength.

This invention provides a brazing filler metal and its preparation method. The preparation method includes the following steps: S100: Melting a matrix alloy, adding reinforcing particles, and continuously stirring to ensure uniform distribution of the reinforcing particles, resulting in a metal solution; S200: Preheating the mold, pouring the metal solution into the mold, and stirring to ensure uniform dispersion of the reinforcing particles; sequentially performing static treatment and cooling treatment to obtain an ingot; S300: Stacking multiple ingots to assemble a composite metal plate; S400: Sequentially performing diffusion welding and rolling on the composite metal plate to obtain the brazing filler metal. The brazing filler metal prepared by this invention can effectively improve the problem of excessive residual stress after brazing.

This invention provides a diffusion welding method and weld joint for magnesium alloys, relating to the field of welding technology. The diffusion welding method includes: Step S1, depositing silver on the surface of the magnesium alloy base material to be welded using magnetron sputtering to form a silver film; Step S2, coating the silver film with a nano-metal particle slurry and drying it to form a nano-metal particle layer, obtaining a workpiece to be welded; Step S3, assembling two workpieces to be welded so that the nano-metal particle layers adhere, obtaining an assembly; Step S4, performing pulsed current-assisted diffusion welding on the assembly under vacuum conditions or an inert gas protective atmosphere to obtain a weld joint. The diffusion welding method for magnesium alloys provided by this invention can avoid defects such as grain growth and large deformation of the base material, and also yields a weld joint with high strength.

This application relates to the field of heat spreader processing, and more specifically, to a production process for ultra-thin heat spreaders (VCs). The process includes the following steps: a copper powder mixture is 3D printed to form a capillary preform structure on the inner surface of a first thin-film cover; then, after degreasing and sintering, a capillary structure is formed on the inner surface of the first thin-film cover; a second cover is then joined to the first thin-film cover and diffusion welded; post-processing is performed to obtain the ultra-thin VC. The copper powder mixture includes copper powder, flux, and a binder. This process results in a final ultra-thin VC with a thin thickness (as low as 1 mm; for example, a thickness of 0.8 mm has a thermal conductivity of over 15 W / (m·K)) and good structural stability (an integrity rate of over 92% after drop testing).