27 results about "Alloy deposition" patented technology

A deformation-driven additive manufacturing method for a low-interfacial-stress aluminum-steel composite structure comprises the steps that an aluminum alloy thin tube is filled with an adding phase with a low thermal expansion coefficient or a negative thermal expansion coefficient and aluminum-silicon powder used for enhancing the thermal plasticizing fluidity of a raw material wire according to the proportion, and after drying treatment, the raw material wire for adjusting the thermal expansion coefficient is manufactured; a continuous wire feeding friction stir additive manufacturing method is adopted, aluminum alloy raw material wires and adjusting raw material wires are synchronously fed according to the rate proportion changing layer by layer, deposition is driven through deformation, and an aluminum alloy composite transition layer with additive phase components changing in a gradient mode is formed; after the aluminum alloy composite material transition layer is completely prepared, the continuous wire feeding friction stir additive manufacturing method is continuously adopted, and continuous deposition is conducted on the aluminum alloy composite material transition layer to form an aluminum alloy deposition layer; and after deposition manufacturing of the component is completed, subtractive machining treatment is carried out, and a final product is obtained. The invention relates to the technical field of dissimilar material additive manufacturing.

The invention relates to the technical field of shield tunneling machines, and particularly discloses a shield hobbing cutter ring and a remanufacturing method thereof. According to the method, the iron-based alloy powder serves as a main body, the modified powder is added as an auxiliary, the remanufactured alloy powder is obtained, the alloy deposition layer is formed on the surface of the cutter ring body through the remanufactured alloy powder, and remanufacturing machining of the shield hob cutter ring is completed. Under the synergistic effect of the components of the modified powder, the alloy deposition layer can have good hardness and wear resistance, the defects of iron-based self-fluxing alloy are overcome, the defects of the remanufactured and repaired cutter ring in the tunneling process are reduced, and various extreme service conditions can be fully dealt with.

The application discloses a kind of heat insulation films and preparation methods thereof.The heat insulation film includes substrate layer, hard coating layer, first dielectric layer, first barrier layer, noble metal layer, second barrier layer, second dielectric layer and adhesive layer from inside to outside.The first dielectric layer is aluminum-doped zinc oxide, the noble metal layer is a silver-gold alloy layer with controllable thickness, and has a gradient distribution of gold content in the thickness direction;The second dielectric layer is formed into a layered composite structure by alternately stacking titanium dioxide and hafnium oxide.The preparation method includes substrate cleaning and surface activation, hard coating layer coating and curing, magnetron sputtering of dielectric layer and barrier layer, alloying deposition of noble metal layer, alternating sputtering of layered composite dielectric, and adhesive layer coating and compounding.The application realizes excellent infrared barrier performance while maintaining high visible light transmittance through the synergistic design of multi-layer structure and components, significantly improves the stability in a humid and hot environment, and reduces the risk of performance degradation.

The invention discloses a stirring friction additive forming process of an alloy heterogeneous laminated component, and belongs to the technical field of metal solid phase additive manufacturing. A substrate material and an additive raw material are selected; the hollow stirring head is moved to a preset position above the substrate material, and the thickness of an additive layer is set to be h; the additive raw material penetrates through the hollow stirring head to be fixed, the additive raw material synchronously rotates along with the hollow stirring head and is fed towards the substrate material under driving of axial force, and the end of the additive raw material makes contact with the surface of the substrate material and generates friction heat; after the end of the additive raw material is heated and subjected to thermoplastic softening, the feeding speed is increased, and a cavity between the bottom of the hollow stirring head and the base is fully filled with the softened material; and after filling saturation, moving along a set path according to a set moving speed for continuous deposition to form an additive alloy deposition layer attached to the substrate material. According to the method, defect-free heterogeneous metallurgical bonding is achieved, the gradient structure of hard layer bearing and soft layer energy absorption is finally formed, high strength and high ductility are achieved, and the method is suitable for manufacturing of high-performance light-weight components in the fields of aerospace and the like.

The invention discloses a friction plug welding stopper rod based on friction stir additive and a preparation method and application thereof.The friction plug welding stopper rod comprises a connecting section, a transition section and a welding section, the connecting section, the transition section and the welding section are sequentially connected, and the friction plug welding stopper rod is manufactured through a friction stir additive manufacturing method; the connecting section, the transition section and the welding section are respectively formed by a substrate used in the friction stir additive manufacturing method, the formed multi-layer composite material deposition layer and the formed multi-layer aluminum alloy deposition layer. The base plate, the multiple composite material deposition layers and the multiple aluminum alloy deposition layers can be in metallurgical bonding in sequence from bottom to top to form a deposition component, and after solid solution-aging composite heat treatment is conducted on the deposition component, the friction plug welding stopper rod is obtained through machining. According to the method, the structure of the friction plug welding stopper rod can be strengthened, so that the friction plug welding stopper rod has higher strength and heat stability in a geometric mutation area, and the fracture resistance and fatigue resistance are remarkably improved.

The invention relates to a device and a method for manufacturing a heterogeneous alloy structure through ultrasonic regulation and control electron beam additive manufacturing, in particular to an electron beam additive manufacturing device for feeding wires through a main shaft and a shaft side and regulating and controlling element diffusion and phase generation in combination with an ultrasonic field effect and a forming method of the electron beam additive manufacturing device. According to the electron beam + double-wire + ultrasonic synergetic additive manufacturing method and system, in the wire bundle coaxial cold cathode electron beam fuse additive manufacturing process, an ultrasonic auxiliary system is introduced to act on a forming base plate, dynamic regulation and control over the heterogeneous alloy element mixing behavior and the structure evolution process in a molten pool are achieved, and therefore the mechanical performance of the molten pool is improved. The problems of coarse grains, uneven structures and performance fluctuation in the heterogeneous alloy deposition process are solved, structure refinement and component homogenization are achieved, and the overall service performance of a deposition component is improved.

The invention discloses a device and a method for inhibiting electric arc additive manufacturing structure segregation of an iron-copper binary refractory gold wire, and belongs to the field of electric arc additive manufacturing of wires. According to the method, powder adding, porous stirring and low-temperature rapid cooling synergism are adopted, and segregation is inhibited from the combined action of three aspects of thermodynamics, dynamics and the solidification process. The method comprises the steps that Fe wires and Cu wires serve as independent electrodes to be fed into a molten pool, alloying is achieved in an electric arc molten pool by accurately controlling the wire feeding speed, and meanwhile nickel-titanium carbide composite powder is fed into the molten pool under the condition that the molten pool is stirred through a porous stirring head; when a welding system starts to move, a gas-solid mixed CO2 forced cooling device is started immediately, gas-solid mixed CO2 is directly sprayed to the surface of a deposition layer close to the rear portion of a molten pool, rapid cooling is achieved, layer-by-layer accumulation is conducted, and FeCu alloy electric arc additive manufacturing is achieved. The alloy deposition layer is uniform in structure and fine in grain, and the mechanical property can be greatly improved.

The application relates to an electrochemical etching method of a porous electrode and an electrolytic water electrode. The electrochemical etching method comprises the following steps: using a nickel-iron metal salt containing a pore-forming agent as an electroplating solution, using a nickel mesh as a working electrode and a platinum sheet as a counter electrode, performing constant-current electrodeposition in the electroplating solution, ensuring that the deposition rate remains unchanged, obtaining a nickel mesh material loaded with a porous nickel-iron alloy deposition layer; cleaning and drying; using a high-temperature furnace to perform fast firing treatment to improve the stability of the catalyst layer; in a two-electrode system, using prepared hydrochloric acid as an etching solution, using the obtained electrode as a working electrode and a platinum sheet as a counter electrode, performing constant-current etching, ensuring that the etching rate remains unchanged, and obtaining a porous electrode finished product after etching. Compared with the prior art, the application solves the problems of insufficient catalytic area of a traditional porous electrode and poor bubble release structure on the surface; is suitable for industrial large-scale production, has a simple preparation process, good repeat stability and low cost.

The invention relates to a method for growing a ferroelectric layer (11) of a rhombohedral ferroelectric alloy on a substrate (10), wherein a growth sublayer (21) formed of a stack of crystalline sheets linked together by van der Waals bonds is arranged on the substrate, and then the rhombohedral crystalline ferroelectric alloy in the form of crystalline grains (12) is deposited onto the growth sublayer at a suitable temperature with a component that segregates between the crystalline grains. Figure for the abstract: Fig. 1.

The invention relates to a method for forming high-toughness metal through yttrium-carbon dual-element composite strengthening selective laser melting, which comprises the following steps that yttrium-carbon dual-element composite nickel-based alloy powder is prepared, and the nickel-based alloy powder comprises the following elements in percentage by mass: 0.4-0.6% of carbon and 0.03-0.1% of yttrium; and the nickel-based alloy powder is printed through a selective laser melting method, and the yttrium-carbon dual-element composite nickel-based alloy part is prepared. According to the method, melt purification, structure refinement and dispersion strengthening are achieved in situ in the SLM forming process through Y-C composite modification, so that a high-performance nickel-based alloy part with the tensile strength exceeding the heat treatment state forge piece standard is directly obtained in a sedimentary state, and the problems that additive manufacturing nickel-based alloy is insufficient in sedimentary state performance and seriously depends on complex aftertreatment are effectively solved.

The invention discloses a corrosion and wear resistant high-entropy alloy coating and a preparation method thereof, the high-entropy alloy coating is arranged on the surface of a matrix, and a Cr diffusion layer, a TiVCr medium-entropy alloy intermediate layer, a TiVCrZrNb high-entropy alloy diffusion layer and a TiVCrZrNb high-entropy alloy deposition layer are sequentially arranged on the surface of the matrix. The preparation method comprises the following steps that in a vacuum environment, the Cr diffusion layer and the TiVCr medium-entropy alloy middle layer are sequentially prepared on the surface of a pretreated base body through a magnetron sputtering method; and a TiVCrZrNb high-entropy alloy diffusion layer and a TiVCrZrNb high-entropy alloy deposition layer are sequentially prepared on the surface of the TiVCr medium-entropy alloy intermediate layer through a double glow plasma surface metallurgy method. The obtained high-entropy alloy coating is good in corrosion resistance and good in wear resistance; and the interface bonding strength between the coatings and between the coating and the matrix is obviously enhanced, and the overall stability of the coating system is greatly improved.

The invention relates to the technical field of eutectic high-entropy alloys, in particular to a Ti modified high-entropy alloy and a laser additive manufacturing method thereof, and the method comprises the following steps: mixing AlCoCrFeNi2.1 powder with Ti powder to obtain mixed powder, designing a three-dimensional digital model and a layered discrete model, and obtaining powder parameters and scanning data; data are imported into 3D printing software, printing parameters are set, after a base plate is preheated and remelted through laser directional energy deposition equipment, mixed powder is fused and deposited on the base plate through a nozzle, layer-by-layer printing is conducted in sequence, and the Ti modified high-entropy alloy is obtained. According to the method, the phenomena of cracking and warping in the alloy deposition process after Ti element is introduced in the laser powder bed melting process are successfully solved through the laser directional energy deposition technology, and the method has important significance for developing the eutectic high-entropy alloy with excellent mechanical properties.

The present application relates to a kind of gradient hole structure's self-supporting alkaline electrolytic water hydrogen production electrode and its preparation method and application, wherein the preparation method includes: A) in two electrode system, two nickel iron metal salt containing different gas production additive concentration are used as electroplating solution, nickel mesh is used as working electrode, platinum sheet is used as counter electrode, electrodeposition is carried out in two kinds of electroplating solution in turn, and make that electrodeposition is while current density is uniformly increased, obtain the nickel mesh material of gradient porous nickel iron alloy deposition layer supported;B) the nickel mesh material obtained in step A is washed, dried, and the gradient hole structure's self-supporting alkaline electrolytic water hydrogen production electrode is obtained.Compared with prior art, the gradient porous nickel iron deposition layer of composite on nickel mesh substrate material is prepared using electrodeposition method in the present application, and gradient porous structure greatly improves the real surface area of electrode, and promotes bubble discharge simultaneously.

Sliding element (1), comprising: a back sheet (10) made of steel as the outermost layer of the sliding element (1), a sintered lining (11) consisting of Cu, Bi and Sn, and an electroplated cover layer (12) as a sliding surface, which is formed from an alloy deposition film of Bi and Sb, wherein the cover layer (12) consists of Bi, Sb and unavoidable impurities, and wherein the Sb concentration on the surface of the cover layer (12) is 0.92 wt% or more and 2.1 wt% or less, wherein the cover layer (12) has a concentration gradient, wherein the Sb concentration increases as the depth or distance from the surface of the cover layer (12) increases.

The invention discloses an aluminum alloy deposition additive forming method and system based on metal extrusion, and belongs to the technical field of metal additive forming. According to the method, an aluminum ingot is adopted as a raw material and pushed into a threaded pipe which is heated to 5 DEG C above the melting point through an extrusion rod, and after melting, components are made to be uniform through rotary stirring; and the nozzle moves in an XY plane according to a preset path, molten metal is extruded and deposited on the preheated substrate, and after each layer of deposition, the substrate descends by one layer of height to be formed layer by layer. The extrusion technology and the fused deposition principle are combined, limitation of traditional FDM materials is broken through, aluminum ingots are directly used for replacing wires, and energy consumption is reduced; a nozzle lifting and temperature control system is replaced by substrate preheating and Z-direction substrate moving, workpiece deformation is reduced, and the surface quality and density are improved. The method has the advantages of high efficiency, low cost, environmental protection and suitability for mass production.

The invention discloses a method for preparing die-casting aluminum alloy through coordinated regulation and control of component optimization and a heat preservation process, and relates to the field of die-casting aluminum alloy materials and processes. The invention relates to a die-casting aluminum alloy sediment inhibition method through cooperative regulation and control of alloy component optimization and an aluminum water heat preservation process. According to the technology, the melt cleanliness is remarkably improved, the hydrogen content and non-metallic inclusions are reduced, the microscopic structure is refined, and generation of a coarse sedimentary phase is inhibited, so that the pore defect level of a casting is reduced, and the relative defect rate of sediments is reduced. The technological parameters of the method can be directly matched with an existing die-casting production line, and high industrial popularization performance is achieved.

The invention discloses a method for laser double-wire additive manufacturing of an aluminum / magnesium bimetallic material based on dynamic heat input, and relates to the technical field of metal material additive manufacturing. The method comprises the following steps that an aluminum alloy welding wire and a magnesium alloy welding wire are adopted as deposition materials, aluminum alloy and magnesium alloy are sequentially deposited on the surface of a base plate through double wire feeding mechanisms, and the aluminum / magnesium bimetallic material is obtained; layered dynamic heat input parameter control is independently carried out in the aluminum alloy deposition process and the magnesium alloy deposition process; the heat input parameters comprise laser power and wire feeding speed. The manufacturing process of double-wire independent feeding and dynamic heat input control is adopted, and the manufacturing efficiency can be improved through double-wire independent feeding; dynamic heat input control can inhibit centralized generation of brittle intermetallic compounds on the interface from the process level, and the interface bonding strength is improved. The aluminum / magnesium bimetallic material prepared by the method disclosed by the invention has good interface bonding strength and excellent comprehensive mechanical properties.

The application discloses a kind of based on dynamic heat input's laser double-wire additive manufacturing aluminum / magnesium bimetallic material method, it is related to metal material additive manufacturing technical field.The method includes the following steps: using aluminum alloy welding wire and magnesium alloy welding wire as deposition material, aluminum alloy and magnesium alloy are sequentially deposited on the surface of substrate by double-wire feeding mechanism, and aluminum / magnesium bimetallic material is obtained;Aluminum alloy deposition process and magnesium alloy deposition process are independently carried out layering dynamic heat input parameter control respectively;The heat input parameter includes laser power and wire feeding speed.The application uses the manufacturing process of "double-wire independent feeding+dynamic heat input control", wherein, double-wire independent feeding can improve manufacturing efficiency;Dynamic heat input control can inhibit the concentrated generation of interface brittle intermetallic compound from the process level, and improve interface bonding strength.The aluminum / magnesium bimetallic material prepared by the method of the application has good interface bonding strength and excellent comprehensive mechanical properties.

The application discloses a method for eliminating anisotropy of a microstructure and performance of additive manufacturing TiAl alloy, and relates to the field of additive manufacturing.The method comprises the following steps: step 1, depositing Ti48Al alloy by adopting an electric arc additive manufacturing technology to obtain a Ti48Al alloy deposition layer; step 2, performing in-situ heat treatment on the deposition layer, that is, performing re-scanning treatment on the deposition layer without adding deposition materials; and step 3, after the re-scanning treatment, continuously repeating steps 1 and 2 to deposit Ti48Al alloy, so that Ti48Al alloy with uniform full lamellar crystal group microstructure is obtained.The method can not only eliminate the non-uniformity and anisotropy of the microstructure of the additive manufacturing TiAl alloy, but also obtain the Ti48Al alloy with fine full lamellar crystal group microstructure and improve the mechanical performance of the material.

This invention relates to the field of alloy material composition design and preparation technology, and particularly to a multi-component alloy deposition design method. Specifically, it includes the following steps: (1) proposing an alloy composition design model based on multi-target confocal magnetron sputtering technology; (2) based on the alloy composition design model, calculating the deposition rate, sputtering power, and sputtering time of each component according to the accurate multi-alloy target composition required for the study; (3) stacking and integrating alloy sublayers with different design compositions onto a single sample based on the above steps. The method provided by this invention can achieve accurate prediction and design of alloy composition, with a large controllable range, from 0-100 at.% and a prediction deviation of less than 5 at.%; it can achieve high-throughput preparation of alloy samples by combining alloy sublayers with multiple compositions onto a single sample through a single experimental procedure.

The application discloses a method for preparing pressure casting aluminum alloy by optimizing components and cooperating with heat preservation process, and relates to the field of pressure casting aluminum alloy materials and processes. The method is a pressure casting aluminum alloy deposit inhibition method by optimizing alloy components and cooperating with aluminum water heat preservation process. The technology significantly improves the melt cleanliness, reduces the hydrogen content and non-metallic inclusions, refines the microstructure and inhibits the generation of coarse deposition phases, so that the air hole defect level of the castings is reduced, and the deposit related defect rate is reduced. The process parameters of the method can be directly adapted to the existing pressure casting production line, and the method has high industrial promotion.

The invention relates to the technical field of high-temperature alloy laser cladding repair manufacturing, and discloses a heat treatment process for regulating and controlling the structure and performance of an IN 625 alloy deposition layer. According to the method, the IN 625 alloy laser deposition layer is subjected to continuous heat treatment under a specific process, so that the deposition chromatography phase form and distribution and microhardness regulation and control are effectively realized, and a technical reference is provided for related employees to design and optimize the heat treatment process of the IN 625 alloy deposition layer.

The invention discloses a La element reinforced rare earth magnesium alloy and a preparation method thereof, and relates to the technical field of metal material manufacturing, and the preparation method comprises the steps that La2O3 particles and an organic solvent are mixed to prepare La2O3 turbid liquid; coating the La2O3 suspension on the surface of the rare earth magnesium alloy wire, and drying to obtain the rare earth magnesium alloy wire with La2O3 particles attached on the surface; the rare earth magnesium alloy wire with the La2O3 particles attached to the surface serves as a raw material for additive manufacturing, layer-by-layer deposition is carried out through an electric arc fuse additive manufacturing process, in the deposition process, the wire is molten through an electric arc heat source to form molten drops and a molten pool, and under the high-temperature effect of an electric arc, the La2O3 particles and liquid magnesium are subjected to an in-situ reaction, so that the rare earth magnesium alloy is obtained. The decomposed La element is fused into an original rare earth magnesium alloy system; and after deposition is completed, the La element reinforced rare earth magnesium alloy deposition state component is obtained. By means of the method, the room-temperature and high-temperature mechanical properties of the rare earth magnesium alloy can be effectively enhanced, the process is simple and universal, and industrialization is easy.

The invention belongs to the field of medical instruments, and relates to a preparation method of an intravascular stent, which comprises the following steps: S1, a conductive pattern is formed on a photosensitive film layer covering a conductive substrate through a photoetching process, and the shape of the conductive pattern is the same as that of a to-be-prepared intravascular stent in a tiled state; and S2, removing the conductive pattern on the photosensitive film layer to expose the conductive substrate at the position of the conductive pattern. And S3, carrying out electroplating deposition treatment on the exposed conductive base material, so that metal or alloy is deposited on the conductive base material to obtain the intravascular stent layer. And S4, removing the residual photosensitive film layer. And S5, separating the conductive base material from the intravascular stent layer to obtain the expanded intravascular stent. S6, the unfolded intravascular stent is curled, welded and post-processed, and the intravascular stent is obtained. The preparation process is simpler, the cost is remarkably reduced, the occurrence risk of complications such as inflammation and restenosis can be reduced, batch production can be realized, and the processing efficiency is greatly improved.

Provided is a method of manufacturing a heterogeneous coated steel sheet having excellent workability and corrosion resistance. The method includes: preparing a steel sheet; levitating a coating material by electromagnetic force in a vacuum chamber to generate zinc deposition vapor, and forming a zinc coating layer having an adhesion amount of 5 to 60 g / m2 on one surface of the steel sheet by inducing and ejecting the zinc deposition vapor; and generating zinc-magnesium alloy deposition vapor by levitating a coating material by electromagnetic force in a vacuum chamber, and forming a zinc-magnesium alloy coating layer having an adhesion amount of 10 to 40 g / m2 on the other surface of the steel sheet by inducing and ejecting the zinc-magnesium alloy deposition vapor. A Mg content contained in the zinc-magnesium alloy deposition vapor is 8 to 30 weight %.

The invention relates to the technical field of nickel-iron alloy deposition, and discloses gradient nano nickel-iron alloy double-sided deposition equipment which comprises an electro-deposition tank, a partition plate is installed at the middle end of the inner side of the electro-deposition tank, and the partition plate is provided with a blocking structure used for separating electro-deposition liquid in a first tank and an electro-deposition liquid in a second tank. The rubber sleeve is extruded by the sliding block to be gradually extruded into the position between the two extrusion blocks, the two sides of the rubber sleeve are in synchronous interference fit, so that the surfaces of the two sides of the rubber sleeve and the surfaces of the two sides of the nickel-iron alloy block are tightly attached, the gap is zero, and when the downward pressing force of the screw rod is transmitted to the rubber sleeve through the sliding block, elastic deformation of rubber is utilized, so that the rubber sleeve is tightly extruded. Enough contact pressure is generated on the contact surface, so that physical sealing is formed, the magnitude of interference of the rubber sleeve is 1%-5% of the diameter of the nickel-iron alloy block at the moment, the nickel-iron alloy block is tightly attached after being assembled, the gap is zero, communication of the first pool and the second pool is thoroughly isolated, and the beneficial effect that deposition liquid of the double-sided electro-deposition nanometer nickel-iron alloy cannot interfere with each other is achieved.

The invention discloses a heat insulation film and a preparation method thereof. The heat insulation film sequentially comprises a base material layer, a hard coating, a first dielectric layer, a first barrier layer, a precious metal layer, a second barrier layer, a second dielectric layer and an adhesive layer from inside to outside. The first dielectric layer is aluminum-doped zinc oxide, and the noble metal layer is a thickness-controllable silver-gold alloy layer and has gold content gradient distribution in the thickness direction; the second dielectric layer is of a layered composite structure formed by alternately stacking titanium dioxide and hafnium oxide. The preparation method comprises the steps of substrate cleaning and surface activation, hard coating coating and curing, magnetron sputtering of the dielectric layer and the barrier layer, alloying deposition of the noble metal layer, alternate sputtering of the layered composite dielectric, coating and compounding of the glue layer and the like. Through collaborative design of a multi-layer structure and components, excellent infrared barrier performance is realized while high visible light transmittance is maintained, the stability in a humid and hot environment is remarkably improved, and the risk of performance degradation is reduced.