53 results about "Selective laser melting" patented technology

The application provides a TPMS porous titanium-based composite structure based on selective laser melting and a preparation method thereof, relates to the technical field of titanium-based composite materials, and the method takes TC4 titanium alloy powder as a matrix, introduces TiB2 ceramic particles as a reaction precursor, uses high-energy laser action to induce in-situ reaction of TiB2 and the titanium matrix in the selective laser melting process, and generates TiB reinforcing phases; on the basis, a porous structure with periodic continuous curved surface characteristics is constructed by combining a three-period minimal surface structure design method, and the synergistic regulation of material performance and structural performance is realized; it is verified that by regulating process parameters such as laser power, scanning speed and scanning interval, the stable forming of the TPMS porous structure can be realized, and the TiB reinforcing phases are uniformly distributed in the structural matrix; the prepared structure has good mechanical response characteristics while keeping high forming precision, and presents stable deformation behavior and continuous energy absorption process under the action of compression load.

This invention relates to the field of alloy forming technology, specifically to a method for preparing Ti-Al medium-entropy alloys based on selective laser melting. The method includes preparing raw material rods, gas atomization powder preparation, 3D modeling, preheating and forming the matrix, powder spreading and leveling, 3D printing pretreatment, pre-powder spreading, and laser printing. This method features high melting rate and high solidification rate, forming unique microstructures such as ultrafine grain structure, metastable phases, and supersaturated solid solutions. By combining alloy composition design, gas atomization powder preparation, and selective laser melting, the resulting parts possess excellent comprehensive mechanical properties and can be used to prepare complex structural parts. Furthermore, it features a short preparation cycle, high material utilization, and rapid forming.

This invention discloses an acid pickling and coating method for selective laser melting (SLM) forming of a fishing net-shaped magnesium alloy scaffold, belonging to the field of scaffold manufacturing technology. The method includes the following steps: S1: Generating a printing model of the magnesium alloy scaffold using modeling software and printing it to obtain a first scaffold prototype; S2: Preparing an acid pickling solution, wiping the first scaffold prototype, placing it in an ultrasonic cleaning tank containing the acid pickling solution, performing ultrasonic acid pickling, followed by deacidification cleaning and drying to obtain a second scaffold prototype; S3: Preparing a coating solution, using a lifting device to fix the second scaffold prototype above a container containing the coating solution and uniformly raising and lowering it, obtaining a third scaffold prototype after multiple raising and lowering operations; S4: Vacuum drying the coated third scaffold prototype to form the final magnesium alloy scaffold. This method solves the problems of unreasonable surface impurity removal and poor coating uniformity in magnesium alloy scaffolds prepared by SLM.

The application discloses a kind of silicon carbide particle reinforced aluminum matrix composite and preparation method thereof, for the problem of interface reaction and big thermal mismatch stress easily occurring in selective laser melting (SLM) forming, the preparation method provided by the application comprises: high-temperature oxidation (900-1200 ℃, 2-6 h) is carried out to SiC raw material, so that its corner is passivated and in-situ generates 0.5-3 μm thick amorphous SiO2 continuous layer;Modified SiC particles are mixed with AlSi10Mg alloy powder to obtain composite powder with a SiC volume fraction of 15%-20%;Finally, SLM process is used to scan and melt layer by layer forming.The application uses amorphous SiO2 layer as a physical barrier, effectively inhibits the generation of brittle Al4C3 harmful phase, and significantly buffers the thermal mismatch stress.The method is simple in process, effectively eliminates the stress concentration of particle tip, greatly improves the density and comprehensive mechanical properties of the formed part.

This invention discloses a high-energy-absorbing lightweight sandwich structure mimicking the elytra of a pine knot weevil and its preparation method, belonging to the field of additive manufacturing technology for lightweight energy-absorbing structures. The structure includes an upper panel, a lower panel, and a core layer structure disposed between them. The core layer structure is formed by splicing together an array of structural units. Each structural unit includes a central elliptical cavity and two hollow cylindrical supports on either side, with the elliptical cavity and the hollow cylindrical supports connected to form a load-bearing system. In the three-layer structure, the middle layer structural unit array is staggered along the axis of the elliptical cavity, and process communication holes are provided on the shared middle panel of adjacent layers. This structure can be integrally formed using selective laser melting, and features good energy absorption performance, reliable connection, and easy powder removal, making it suitable for UAV fuselages and other lightweight protective structures.

This invention discloses a method for manufacturing an outer nozzle of a baffle nozzle with a sweating cooling function. The method uses high-temperature alloy powder as raw material and performs selective laser melting forming according to a preset laser scanning path and laser selective melting forming parameters to obtain the outer nozzle of the baffle nozzle with a sweating cooling function. The laser scanning path is determined based on a three-dimensional model, which is a ring-shaped periodic porous structure with sweating cooling. This invention utilizes the concept of sweating cooling in the outer nozzle of a liquid rocket engine baffle nozzle, using fuel as the cooling medium. As the fuel flows through the outer nozzle, it undergoes strong convective heat transfer with the nozzle. Simultaneously, a liquid film forms on the surface of the outer nozzle, hindering heat transfer between the outer nozzle and the high-temperature mainstream, thus achieving thermal protection of the outer nozzle and preventing ablation damage.

This invention relates to a method for manufacturing high-silicon Fe-based magnetic media using a remelting-rescanning strategy via laser 3D printing, belonging to the fields of advanced manufacturing and mineral magnetic separation. This invention uses high-silicon Fe-based magnetic media powder as raw material. During laser additive manufacturing, the same powder layer is scanned multiple times. After the initial melting, the layer is scanned at least once more using the same laser scanning path, resulting in the high-silicon Fe-based magnetic media. This invention inherits the additive manufacturing characteristics of selective laser melting technology, effectively solving the bottlenecks of extremely brittle processing and geometric limitations in traditional manufacturing processes. Furthermore, it enables personalized customization of the shape and structure of complex high-frequency magnetic media, providing a new approach for manufacturing high-performance high-silicon Fe-based magnetic media. The process of this invention is simple and controllable, and the resulting product has superior overall performance, facilitating large-scale industrial applications.

This utility model discloses a digital dental 3D-printed titanium framework, comprising a pure titanium frame, a support mechanism and an occlusal mechanism on the pure titanium frame, the support mechanism including an upper support rod and a lower support rod, the top of the upper support rod being fixedly connected to a bone contact surface, the bone contact surface having multiple first micropores, multiple embedded protrusions at the outer edge of the bone contact surface, and first positioning markers on the bone contact surface, and multiple triangular support components between the upper and lower support rods, the triangular support components including a first support rod and a second support rod, belonging to the field of medical device technology. This digital dental 3D-printed titanium framework acquires three-dimensional data of the patient's teeth and jaws through an intraoral scanner, uses selective laser melting equipment, and selects medical-grade Ti-6Al-4V ELI alloy powder as the printing material, effectively improving accuracy, shortening the processing cycle, reducing weight, improving osseointegration efficiency, and reducing costs.

The application discloses a kind of local reinforcement selected area laser melting deposition high-strength titanium alloy preparation method and system, belong to additive manufacturing technical field.The local reinforcement selected area laser melting deposition high-strength titanium alloy preparation method provided by the application, by establishing target titanium alloy structure three-dimensional model and carrying out finite element limit load simulation analysis, stress distribution and potential dangerous area are identified;Based on the analysis result, the performance requirement is divided, the material enhanced local area is determined, and the laser scanning path and powder feeder movement trajectory are planned;Path file is imported into composite equipment to set process parameters;Titanium-based composite material powder is selectively laid in the enhanced area, and a locally reinforced structure is obtained by selective laser melting.The scheme realizes the spatial selective distribution of powder composition, forms a uniform distribution of high-stress areas, significantly improves the local strength and maintains the overall strength and plasticity matching, effectively solves the problem of insufficient performance matching of titanium alloy components under complex load.

The application relates to the technical field of metal additive manufacturing, in particular to an SLM additive manufacturing method and system based on ultrafast laser in-situ assistance and application, which comprises the following steps: a three-dimensional model of a part to be formed is established and slice processing is carried out to generate a scanning path of a main laser; an ultrafast laser is coaxially combined with the main laser, and working parameters of the main laser and the ultrafast laser are set; a layer of metal powder is laid in a forming area, the main laser scans and melts the metal powder according to the scanning path to form a molten pool, and the ultrafast laser acts on the tail of the molten pool or the solidification front of the point after the main laser scans the point at a preset time interval; layer-by-layer processing is carried out until the whole part is manufactured. The ultrafast laser is coaxially integrated with the main laser, and in a preset time interval after the main laser scans a point to melt the metal powder and form a molten pool, the ultrafast laser is used to impact and inject energy into the tail of the molten pool or the solidification front which is advancing, so that grain refinement, defect elimination and stress regulation can be realized, and high-performance metal parts with small and uniform microstructure, few internal defects, low residual stress, excellent mechanical properties and significantly improved isotropy can be prepared.

The invention relates to the field of metallurgy and more specifically to an aluminum alloy based powder material for producing parts by additive techniques including selective laser melting. It is proposed an aluminum powder material containing silicon, iron, magnesium, zirconium, with the condition Si ≥ Mg*6.5 + Fe*5. The technical result is an increase in the strength and thermal conductivity properties of aluminum alloys for producing parts by powder techniques including additive techniques, while maintaining the strength properties corresponding to medium strength aluminum alloys.

1. The name of the design product: selective laser melting equipment (BLT-S230 (2025 version)). 2. The use of the design product: for laser selective melting powder forming manufacturing, belonging to the field of additive manufacturing equipment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The bottom of the design product is the part that is not easy to see or cannot be seen during use, and the top view is omitted.

The utility model discloses a kind of powder backfilling devices of selective laser melting equipment, it is related to selective laser melting equipment technical field, including support box, the fixed cylinder is fixed in support box top, double-shaft air suction motor is installed in the fixed cylinder inside.The utility model can efficiently recycle the metal powder of printing residue by the collaborative work of double-shaft air suction motor, filter cartridge and filter plugboard, and high-precision filtration is carried out to it, the influence of impurity on subsequent printing quality is avoided, simultaneously under the cooperation of first lug disc and second lug disc, recycling hose can be reciprocatingly shaken, the recycling of powder is facilitated, recycling process is closed, the condition of powder flying is greatly reduced, the health of working environment and operator is protected, in addition, reciprocating mixing scraper in powder storage box cooperates with transmission belt, can fully mix the recycled metal powder with original powder, ensure the uniformity of powder supply, improve subsequent printing quality.

This invention discloses an integrated device for selective laser melting (SLM) recovery powder sieving, packaging, and testing, and its operating method. The device includes a cabinet, a powder sieving mechanism, a sampling and diversion structure, a bag feeding mechanism, a bag-supporting, sealing, and vacuuming mechanism, a bag-supporting and weighing mechanism, and a control unit. The powder sieving mechanism is located at the top of the cabinet, and the sampling and diversion structure is downstream of the powder sieving mechanism. The bag feeding mechanism, bag-supporting, sealing, and vacuuming mechanism, and bag-supporting and weighing mechanism are sequentially arranged from top to bottom along the main powder discharge path to complete the bagging, sealing, vacuuming, and weighing of the recovered powder. The sampling and diversion structure is connected to the main powder discharge path to intermittently obtain a portion of the recovered powder from the main powder discharge path. The cabinet is equipped with a particle size analyzer and a LIBS analyzer. The control unit is electrically connected to each mechanism. This integrated device is rationally designed and facilitates the sieving, bag feeding, bag-supporting and powder collection, vacuum sealing, weighing output, and packaging removal of the recovered powder with reduced manual intervention.

The application is suitable for the technical field of metal additive manufacturing, and provides a method for preparing CoCrNiAl alloy with controllable microstructure, no cracks and high strength and toughness by selective laser melting, comprising the following steps: taking raw material powders of Co 10%-50%, Cr 5%-25%, Ni 10%-50% and Al ≤12% according to atomic percentage, vacuum debinding after alloying by mixing treatment to obtain alloy powders with uniform composition; performing selective laser melting forming on the obtained alloy powders to obtain a printing state alloy by optimizing printing process parameters; and performing heat treatment on the obtained printing state alloy to obtain CoCrNiAl alloy with controllable microstructure, no cracks and high strength and toughness, wherein the CoCrNiAl alloy prepared by the application has the characteristics of controllable microstructure, no cracks, high strength and high toughness, and is suitable for the application requirements of complex structure high-performance parts in the fields of aerospace, nuclear industry and the like.

The application discloses an in-situ self-grown particle reinforced heat-resistant aluminum rare earth alloy and a preparation method thereof, and belongs to the field of metal material preparation. The application adds TiB2 particles and Mg, Zr and Zn in an aluminum-cerium alloy, so that multi-component reinforcing phases are formed in an alpha-Al matrix, and the grains are further refined, which not only improves the mechanical properties and ductility of the aluminum-cerium alloy at room temperature, but also enables the material to still maintain good tensile strength and excellent elongation in a thermal exposure environment. In addition, the method of the application generates TiB2 particles in-situ in a smelting process, cooperates with component design and selective laser melting additive manufacturing, and significantly improves the mechanical properties of the alloy.

The present application relates to the technical field of additive manufacturing, in particular to a kind of micrometer flow channel's additive manufacturing method and its application.Micrometer flow channel's additive manufacturing method, comprising the following steps: (a) based on the distribution of preset micrometer flow channel in target configuration, configuration main body is split into several mutually parallel solid cylinders, obtain stl model and carry out slicing, obtain slice file;(b) based on the slice file, metal powder is formed by selective laser melting process and is additively manufactured, obtain the target configuration with micrometer flow channel;In step (a), adjacent solid cylinders are tangent or intersect, and the pore surrounded by every 4 solid cylinders corresponds to micrometer flow channel.The additive manufacturing method of the present application, by appropriate micrometer flow channel configuration design, without changing SLM equipment and technology, can realize the controllable preparation of micrometer flow channel, significantly improve the forming precision of extremely fine structure.

The invention relates to the technical field of alloys, in particular to a Ti2AlNb-based alloy for 3D printing and a preparation method of the Ti2AlNb-based alloy. The Ti2AlNb-based alloy for 3D printing, provided by the invention, comprises the following components in percentage by mass: 10.4 wt%-10.9 wt% of Al, 40.7 wt%-42.5 wt% of Nb, 0.5 wt%-8.4 wt% of a stable element and the balance of Ti, wherein the stable element comprises at least one of Fe, Ni and Mo; the addition amount of Fe is 0.5 wt%-1.1 wt%; the addition amount of Ni is 0 wt%-0.5 wt%; and the addition amount of Mo is 5.1 wt%-8.4 wt%. The Ti2AlNb-based alloy for 3D printing is suitable for the selective laser melting process, has good forming performance, can reduce the cracking risk in the heat treatment process, and meanwhile has excellent strength and plasticity.

The invention discloses a method for refining 316L stainless steel grains based on a selective laser melting technology, and belongs to the technical field of metal material additive manufacturing. According to the method, Fe-C-B alloy powder is added, a Fe-B or Fe-B-Cr type compound is formed to serve as a heterogeneous nucleation core when the 316L stainless steel component is manufactured through selective laser melting, columnar crystal epitaxial growth is inhibited, and grain refinement is achieved. By means of the synergistic effect formed by Fe, C and B, the negative influence of the SLM technology on the 316L stainless steel forming process is avoided, the advantages of the SLM technology are fully exerted in the 316L stainless steel component forming process, accordingly, the 316L stainless steel component high in compactness and excellent in comprehensive performance can be formed only through SLM, the method is stable in process, low in crack sensitivity and high in yield, and the production cost is reduced. The method has remarkable advantages in the field of additive manufacturing of high-performance 316L stainless steel components.

This invention discloses a lightweight ball core design method, a lightweight ball core, an additive manufacturing process, and a ball valve, relating to the fields of mechanical component design and advanced manufacturing technology. The method achieves design through five steps: defining baseline working conditions, topology optimization of a configuration library, unified simulation comparison, quantitative evaluation and selection, and engineering refinement of the output model. Topology optimization applies process constraints, the truss structure employs a unit decomposition and recombination method, and a quantitative evaluation index system is also constructed. The lightweight ball core of this invention incorporates a single or composite internal support structure selected by this method, preferably a dumbbell-shaped composite structure with a central partition. Its additive manufacturing process uses selective laser melting of metal for integrated forming, with preheated substrate and pre-set powder venting holes in the model. A ball valve incorporating this ball core is also disclosed, enabling pre-manufacturability implementation, data-driven scientific decision-making, forming a design-structure-manufacturing closed loop, balancing lightweighting and mechanical performance, and improving the overall performance of the ball core and ball valve.

1. The name of the design product: selective laser melting equipment (BLT-S815(2025 version)). 2. The use of the design product: for laser selective melting powder forming manufacturing, belonging to the field of additive manufacturing equipment. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1. 5. The bottom of the design product is the part that is not easy to see or cannot be seen during use, and the top view is omitted.

The present application relates to the technical field of composite reaction structure material, and particularly relates to a composite reaction structure material, a preparation method and application thereof, comprising the following steps: S1. Topology optimization model construction, a topology optimization model of a component is constructed in laser additive manufacturing modeling software, and is imported into a selective laser melting (SLM) operating system; S2. High-entropy alloy reaction structure material powder preparation, and high-entropy alloy reaction structure material powder after drying treatment is put into a powder bin of the SLM operating system; S3. High-entropy alloy reaction structure material skeleton forming, high-entropy alloy reaction structure material powder is layer by layer melted and accumulated on a substrate by using the SLM process, and a high-entropy alloy reaction structure material skeleton with a topology optimization model structure is prepared; S4. An (Al, Ti) / PTFE / organic solvent mixture is filled into the high-entropy alloy reaction structure material skeleton with the topology optimization model structure, and after the solvent is volatilized, a high-strength and high-activity composite reaction structure material component is obtained.

This invention discloses a design method for a density gradient minimized surface structure, aiming to solve the problem of poor mechanical property balance in existing uniform minimized surface structures and obtain a minimized surface structure with balanced performance. The method comprises the following steps: 1. Using the RegionPlot3D command in Mathematica software, implicit function plotting is performed to obtain a Gyroid-type uniform minimized surface, where parameter l is the cell size and C is an isoparameter; 2. Determining l and C, C is adjusted according to an nth-order curve (n≥1) to change the relative density along the Z-axis from ρ... 匀 The gradient becomes 2ρ 匀 A three-dimensional model is generated, where L=ml and m is a natural number; 3. Samples are prepared by selective laser melting additive manufacturing. Experiments have shown that the secondary gradient structure can achieve a balance between static and dynamic mechanical properties, and is suitable for energy absorption, protection and other fields.

The application discloses a preparation method of a selective laser melting Cr4Mo4V series steel structural part, and aims at the problems of large carbide size of the existing bearing steel and machining difficulty of a complex structural part. The preparation method of the selective laser melting Cr4Mo4V series steel structural part comprises the following steps: firstly, preparing a steel powder from a Cr4Mo4V series steel rod through a gas atomization method; secondly, adopting the steel powder to perform selective laser melting forming; under an inert protective atmosphere, the laser power is controlled to be 210-330 W, the scanning speed is controlled to be 500-1700 mm / s, the scanning interval is controlled to be 60-120 µm, the layer thickness is controlled to be 30-50 µm, the energy density is controlled to be 50-85 J / mm 3 , and the substrate temperature is controlled to be 150-250 ℃, so that the Cr4Mo4V series steel structural part is obtained through laser melting forming. The powder is prepared through the gas atomization process, the defect density and thermal cracks are reduced by optimizing the selective laser melting parameters, and therefore the forming capacity of the component is improved.

Provided herein are implants and methods for producing implants. In at least one embodiment, the implants include sheet-based, triply periodic, minimal surface (TPMS) portions. According to one embodiment, the TPMS portions include a gyroid architecture that provides for improved osseointegration and mechanical performance over previous implants due to novel ratios of porosity to compressive strength, among other features. In one or more embodiments, the gyroid architecture is organized into unit cells that demonstrate anisotropic mechanical performance along an insertion direction. In various embodiments, the present methods include novel selective laser melting (SLM) techniques for forming the TPMS portions of implants in a manner that reduces defect formation, thereby improving compressive performance and other implant properties.

The present application relates to a kind of GH4061 alloy powder printing forming and heat treatment method.The method includes the following steps: preparing GH4061 alloy powder, the GH4061 alloy powder includes Ni 50-60%, Cr 15-18%, Fe 12-14%, Mo 2-5%, Nb 3-8%, Al 1-2%, Ti 0-3%, Cu 0-1%, V 0-1%, C 0.03-0.08%, B 0.005-0.01% by mass fraction, the balance is inevitable impurity;The powder is printed forming using selective laser melting process, and printing parameter includes substrate preheating temperature 50-200 ℃, laser power 190-350 W, scanning speed 600-2000 mm / s, scanning interval 0.06-0.18 mm, layer thickness 0.03-0.06 mm;Formed piece is sequentially subjected to homogenization treatment, solution treatment and two-stage aging treatment.

This invention relates to the field of titanium alloy material preparation, and discloses a method for manufacturing high-temperature titanium alloys based on a molten tin bed. The method involves activating a laser selective melting (SLM) module to perform layer-by-layer, zoned scanning and shaping of pre-treated titanium alloy powder. Each layer first scans the contour buffer zone, then the main body area. Adjacent layers are scanned at a 67° angle. After each layer is shaped, in-situ full-coverage remelting is initiated within ≤0.3 seconds. After remelting, the molten tin bed module performs simultaneous isothermal heat treatment and fluid support on the current shaped-remelted layer using molten tin. After overall shaping, temperature-controlled cooling and post-processing yield the finished part. This invention combines a zoned strategy of "spiral scanning of the contour buffer zone + checkerboard scanning of the main body area," regional laser parameter control, in-situ laser remelting technology, and a high-temperature titanium alloy SLM manufacturing method that simultaneously achieves shaping and heat treatment. This method can precisely optimize the shaping quality of different areas, improve the density and overall performance of components, and does not significantly increase the shaping time.

This application discloses a method for additive manufacturing of NdFeB alloys and a three-dimensional NdFeB alloy part. The method includes: providing a substrate electrically connected to a pulsed power supply; printing NdFeB alloy powder layer by layer on the substrate, specifically including: applying a pulsed current to the substrate in an inert gas protective environment; melting and solidifying the NdFeB alloy powder on the substrate along a predetermined path using selective laser melting technology; repeating the above layer-by-layer printing steps until a three-dimensional NdFeB alloy part of a predetermined size is obtained. Compared with the prior art that relies solely on laser parameter adjustment, this application offers greater flexibility in process control, significantly broadening the process window for NdFeB alloy additive manufacturing, and providing a feasible and easy-to-implement method for obtaining high-density, high-quality, and stable NdFeB alloy additive manufactured components.

This invention discloses a selective laser melting and forming method based on a high-repetition-rate femtosecond laser pulse train, belonging to the field of metal additive manufacturing technology. The method uses a high-repetition-rate femtosecond laser to melt and form material powder layer by layer. The laser has higher heating efficiency for the processed material, thereby achieving a faster processing speed and higher processing accuracy at the same laser power. By optimizing parameters such as the modulation frequency and duty cycle of the laser pulse train, this method can achieve adaptive selective laser melting of materials with low absorptivity, high thermal conductivity, and high melting point.