98results about "Additive manufacturing" patented technology

A vacuum induction melting (VIM) furnace and method of using. A VIM is configured for use with metal-containing carbon powders. In operation, the metal-containing carbon powders are formed into a pellet so as to minimize or eliminate ejection of material during introduction of the pellet into the VIM processor. The VIM processor may be substituted or used in combination with a vacuum arc melt processing apparatus, an electron beam melt furnace, an ion plating furnace, a plasma flame source, a smelter, a traditional metal-metal melt furnace, or any equivalent. Pelletizing can be accomplished through use of a press or through application of any pelletizing technique and / or use of any apparatus that is able to generate pellets that have sufficient mass to avoid ejection from a VIM processor.

Inventive techniques for forming unique compositions of matter are disclosed, as well as associated physical characteristics and properties of the materials. In particular, particles comprising a metal lattice are characterized by having carbon (preferably graphene) disposed within the crystalline lattice structure thereof. The carbon is at least partially disposed in interstitial sites of the metal lattice, and may be present in amounts ranging from about 15 wt % to about 90 wt % of the total particle mass, with about 15 wt % to about 60 wt % being disposed in the interstitial sites, e.g., between basal planes, of the metal lattice. The carbon, moreover, is substantially homogeneously dispersed throughout the resultant material, conveying unique and advantageous properties such as strength-to-weight ratio, density, mechanical toughness, sheer strength, flex strength, hardness, anti-corrosiveness, electrical and / or thermal conductivity, etc. as described herein. In some approaches, the graphene is pristine, and has corresponding physical characteristics as described herein.

The invention discloses an alloy aluminum bar containing rare elements and a preparation technology of the alloy aluminum bar. The alloy aluminum bar comprises, by mass, 1.5%-3.3% of Mg, 0.7%-1.1% of Si, 1.0%-1.7% of Cu, 0.15%-0.3% of Y, 0.07%-0.1% of Er, 0.05%-0.11% of Gd, 0.07%-0.24% of La, 0.08%-0.15% of Zr, 0.07%-0.12% of Ti, 0.05%-0.1% of Sc, smaller than or equal to 0.1% of Fe, 0.35%-0.7% of Mn, 0.2%-0.6% of Ni, smaller than or equal to 0.5% of total impurities and the balance aluminum. The preparation process comprises the following steps: burdening: accurately weighing a high-purity aluminum ingot, Al-Y, Al-Zr, Al-Ti intermediate alloy and pure metal according to the components; smelting: melting at 720-750 DEG C, preserving heat, and protecting by argon; cooling to 740-720 DEG C, and adding an intermediate alloy; a refining agent is added for degassing and deslagging, and slagging-off is conducted after standing is conducted for 30 min; casting: the temperature is 720-740 DEG C, the casting speed is 120-200mm / min, the strength of cooling water is 0.06-0.15 MPa, the water temperature is 10-30 DEG C, and online degassing is performed outside the furnace so that the hydrogen content is less than or equal to 0.15 cm / 100g Al; through scientific proportioning of conventional alloy elements such as Mg, Si, Cu and Mn and various rare elements such as Y, Er, Gd, La, Sc, Zr and Ti, the synergistic strengthening effect of the conventional elements and the rare elements is achieved, and the performance bottleneck of a traditional aluminum alloy is effectively broken through.

Variable pitch fan blade (8a) for an unfaired turbomachine fan, the blade (8a) comprising an aerodynamic blade (9) and a base (10), the blade (9) comprising a recess opening simultaneously onto the upper and lower surfaces (14) and a leading edge (15) of the blade (9), the blade (8a) further comprising a measuring device (26) housed in the recess and clipped onto the blade (9), the measuring device (26) comprising a streamlined body (28) whose outer surface (29) is complementary to the outer surface (30) of the blade (9) to ensure aerodynamic continuity, the body (28) carrying at least one measuring instrument (31) configured to measure at least one parameter of an airflow upstream of the blade (9). Figure for the abstract: 2

The invention belongs to the technical field of metal materials, and discloses precipitation-hardening stainless steel and a preparation method thereof. Through cooperative regulation and control of component design and process innovation, the traditional contradiction of'strength-plasticity inversion 'in additive manufacturing of the precipitation-hardened stainless steel is broken through, and the precipitation-hardened stainless steel with excellent strength and plasticity is prepared. On one hand, the N element is introduced into the precipitation-hardening stainless steel raw material powder, so that transformation from ferrite to austenite in the additive manufacturing process is promoted; on the other hand, in the additive manufacturing process, the substrate is subjected to in-situ heating to be close to the martensite phase transformation initial temperature, and transformation of austenite to martensite is restrained; and after printing is finished, global martensite phase transformation is triggered through natural cooling or air cooling, so that a total martensite structure with fine grains and high dislocation density is obtained. And finally, through aging treatment, precipitation of a nano Cu phase is induced, formation of austenite is reversed, and therefore the strength and plasticity of the precipitation-hardened stainless steel are improved at the same time.

The invention discloses a printing and heat treatment process of a special Ti175 alloy for additive manufacturing, and belongs to the technical field of titanium alloy machining, and the printing and heat treatment process comprises the following steps: S1, carrying out printing forming on Ti175 alloy powder by adopting 3D printing equipment; and S2, the component printed and formed in the step S1 is subjected to heat treatment within the temperature range of 950-1100 DEG C and then cooled to the room temperature. According to the printing and heat treatment process of the special Ti175 alloy for additive manufacturing, the density of the Ti175 alloy is improved through the printing process, the mechanical property of the alloy can be greatly regulated and controlled through the heat treatment process, the plasticity of the Ti175 alloy is optimized, and the room-temperature tensile strength and the elongation at break are improved.

A kind of shoe sole accessory based on air-permeable metal processing and preparation method, shoe sole and shoe, belong to shoe sole accessory technical field, the accessory includes 3D printing integrated air-permeable metal accessory body, it is equipped with air-permeable part including uniform distribution through air-permeable hole and accessory perimeter and fixed position are equipped with opening;Its preparation method includes: 3D printing and sintering are made metal accessory, it is positioned after injection TPU material and is covered fixed as insert;The application also provides the shoe sole and shoe integrated with the accessory, realizes the accessory ultra-thin and high air permeability by 3D printing, solves the contradiction of traditional accessory heavy and insufficient strength, significantly improves the air permeation efficiency of shoe product, wearing comfort and durability.

The application discloses a Co-WC hard alloy with a multilayer gradient structure and a preparation method and application thereof, the multilayer gradient structure is an N-layer gradient layer structure in which the content of Co increases layer by layer and the content of WC decreases layer by layer from a top layer to a bottom layer, wherein N is greater than 4; each layer in the gradient layer structure is composed of WC and Co; and the volume fraction of WC is greater than that of Co in the top layer. The hard alloy prepared by adopting the process combining 3D printing and powder metallurgy has high hardness, high wear resistance, high toughness and high impact resistance, the gradient structure layer designed can be accurately printed out through the 3D printing process, the thickness of each layer and the powder uniformity are ensured, the performance of the gradient structure hard alloy is optimized, and the production cost of the product is reduced.

To reduce acidic exhaust gas generated upon degreasing a resin structure molded using a mixed material containing a polyacetal resin and metal powder.SOLUTION: Degreasing is executed in the presence of formic acid produced from a resin structure without the intervention of additional acid to obtain a degreased structure.SELECTED DRAWING: Figure 1

To provide a copper alloy molding having excellent electrical conductivity.SOLUTION: A copper alloy molding comprises, in mass%, C: 0.01-3.00% and, as an optional additional component, an element M: 0.0-5.0% or less (where the element M is one or more selected from Zr, Hf, Ti, Nb, V, Mo, Mn, Cr, W, and Al) with the balance being Cu and inevitable impurities.SELECTED DRAWING: None

The present application belongs to the technical field of metal materials, and discloses a precipitation hardening stainless steel and a preparation method thereof. Through synergistic regulation of component design and process innovation, the present application breaks through the traditional contradiction of "strength-plasticity inversion" in additive manufacturing of precipitation hardening stainless steel, and prepares a precipitation hardening stainless steel with excellent strength and plasticity. On the one hand, by introducing N element in the raw material powder of the precipitation hardening stainless steel, the transformation of ferrite to austenite in the additive manufacturing process is promoted; on the other hand, the substrate is heated in situ to the vicinity of the martensite transformation starting temperature in the additive manufacturing process, and the transformation of austenite to martensite is inhibited; and after the printing is completed, global martensite transformation is triggered by natural cooling or air cooling, so that the full martensite structure with fine grains and high dislocation density is obtained. Finally, through aging treatment, the precipitation of nano Cu phase is induced, and the formation of austenite is reversed, so that the strength and plasticity of the precipitation hardening stainless steel are simultaneously improved.

The invention relates to an additive manufacturing technology of a refractory metal material, and provides an induction heating degreasing method for 3D pure tungsten printing, which comprises the following steps of: preparing a binder system by taking polystyrene and polyformaldehyde as main binders, polymethyl methacrylate as a secondary binder and stearic acid as a surfactant; a pure tungsten precursor is obtained through a powder extrusion printing technology, and a high-density blocky tungsten sample is prepared through a high-temperature sintering technology after induction heating degreasing. According to the method, the high-performance, high-density and high-uniformity tungsten material can be prepared through the method that the pure tungsten precursor is prepared through the binder capable of being rapidly thermally decomposed and then induction heating degreasing is conducted, the efficiency of traditional thermal degreasing is greatly improved, and it is ensured that the material stably works in the high-temperature and high-radiation environment; the material is suitable for the fields of aerospace, nuclear industry and high-temperature application.

The present invention provides a novel method for producing a structure comprising an assembly of metal-based particles. Provided is a method for producing a layered product, the layered product comprising a substrate having a three-dimensional surface; and a metal-based particle assembly layer arranged on the three-dimensional surface and comprising a plurality of metal-based particles arranged apart from each other, the method comprising the step of forming the metal-based particle assembly layer on the three-dimensional surface by immersing the substrate in a plating solution containing a cation of a metal constituting the metal-based particles to reduce the cation, wherein a VS / VL ratio of volume VS [cm3] of the substrate to volume VL [cm3] of the plating solution is 0.03 or less.

The present invention relates to a method for manufacturing a labyrinth seal using wire arc additive manufacturing, which is mounted between a diaphragm of a turbine and a turbine rotor to induce a smooth rotation of the turbine rotor and preventing gas leakage by minimizing friction between the diaphragm of a turbine and a turbine rotor when a rotating body such as the turbine rotor rotates inside a fixed body such as the diaphragm, and which includes a ring-shaped body part and a tooth part protruding on one side of the ring-shaped body part, wherein the labyrinth seal is deposition-manufactured by 3D printing, the body part is manufactured by the wire arc additive manufacturing, and the tooth part is manufactured by a directed energy deposition.

In order to provide a copper alloy additively manufactured article having high electrical conductivity while controlling the amount of Ag added, the present invention is a copper alloy mixed powder which is obtained by mixing 5.0-50.0 mass% of a second copper alloy powder, which contains Cu as a main component, contains 0.1-2.0 mass% of Ag, and contains Ag, Cr, and Zr in a total amount of 0.2-5.0 mass% into a first copper alloy powder, which contains Cu as a main component, contains Cr, and contains Cr and Zr in a total amount of 0.2-5.0 mass%.

To provide an Fe base alloy for melt solidification molding in which cracking is hard to generate in a molded object when being used for melt solidification molding such as lamination molding, and capable of obtaining a build-up layer, a lamination molded object or the like having high hardness, and a metal powder having an average composition equal to the same.SOLUTION: An Fe base alloy for melt solidification molding has a composition comprising 18.0≤Co<25.0 mass%, 12.0≤Mo+W / 2≤20.0 mass%, 0.2≤Mn≤5.0 mass% and 0.5≤Ni≤10.0 mass%, and the balance Fe with inevitable impurities, and satisfies 58≤Co+3(Mo+W / 2)≤95 and A / B≥1.6; where A=Co+Ni+3Mn and B=Mo+W / 2+Si. A metal powder is made of the one having an average composition equal to that of the Fe base alloy for melt solidification molding.SELECTED DRAWING: Figure 2

The invention belongs to the technical field of hydrogen production through water electrolysis, and discloses a eutectic high-entropy alloy-based gas diffusion layer for an AEMWE electrolytic bath and a preparation method of the eutectic high-entropy alloy-based gas diffusion layer. According to the method, eutectic high-entropy alloy spherical powder with the component being AlFeCoCrNi2.1 is prepared through a gas atomization method; establishing a model with a three-dimensional imitated lattice superstructure under the optimized parameters through an SLM (selective laser melting) process; and the selective laser melting technology is adopted, eutectic high-entropy alloy spherical powder is integrally formed into a gas diffusion layer component according to the model, then heat treatment and electrochemical dealloying treatment are conducted, and a three-dimensional bicontinuous nano-porous structure is formed on the surface. The novel high-entropy alloy, the advanced SLM additive manufacturing technology, the structural design concept and the systematic post-treatment process are combined, the novel EHEA-based gas diffusion layer which is excellent in performance, controllable in structure and reliable in preparation is successfully created, development of a high-performance water electrolysis device is promoted, and a solid foundation is laid for industrial application.

The invention provides a high-strength high-toughness corrosion-resistant Al-Mg alloy material and a preparation method, the alloy material comprises a core layer and an edge layer, the edge layer is a pure aluminum layer, and the core layer is a high-magnesium aluminum alloy ingot; and the aluminum alloy material is obtained after three-stage homogenization treatment and rolling. The alloy material has high strength and excellent corrosion resistance, the intergranular corrosion weight loss is smaller than or equal to 3 mg / cm < 2 >, and the exfoliation corrosion rating is PB.

Burners and methods of making burner bodies via a focused beam are disclosed. In an aspect, a burner includes (a) a burner body and (b) at least one connector configured to supply at least a fuel and an oxidizer to the burner body. The burner body includes (1) a plurality of passageways; (2) a first major surface; (3) a plurality of ports at the first major surface, each port defined by an end of one of the passageways; and either: (4a) at least one heating element in or adjacent to at least one of the plurality of passageways that increases the temperature of a wall of the at least one of the plurality of passageways; or (4b) a cooling chamber directly adjacent to three or more of the plurality of passageways. The burner body includes a number of layers of metal directly bonded to each other. Further, methods are provided, including receiving, by a manufacturing device having one or more processors, a digital object comprising data specifying a burner body; and generating, with the manufacturing device by an additive manufacturing process, the burner body based on the digital object. A system is also provided, including a display that displays a 3D model of a burner body; and one or more processors that, in response to the 3D model selected by a user, cause a 3D printer to create a physical object of the burner body.

A method of manufacturing an electrode, the method comprising: depositing a powder to form a composite layer on an electrically conductive substrate, the composite layer comprising an active material and particles of binder material for adhering the active material to the electrically conductive substrate; exposing the composite layer to a light source to heat the particles of binder material and thereby cause groups of particles of the binder material to coalesce to form droplets on and / or within the composite layer; and solidifying the droplets of binder material.

This grooving tool includes a cutting insert, a holder, and a coolant flow path. The holder includes an insert mounting seat, and jaw parts that are disposed on an upper side and a lower side of the insert mounting seat and fix the cutting insert. The jaw part forms a curved shape as viewed from a tool distal end side, and has a thickness that is decreased as a distance from the insert mounting seat is increased. The coolant flow path includes a jaw part flow path extending through an inside of the jaw part, and the jaw part flow path includes a guide flow path section that has a vertically elongated shape with a dimension a in the vertical direction larger than a dimension b in the tool width direction in a channel cross section, and an ejection flow path section that has a laterally elongated shape.

RTB-based sintered magnet with: R: 27.5 to 34.0 mass%, where R is at least one of the rare earth elements, and necessarily includes Nd and a heavy rare earth element RH, where RH is at least one of Dy, Tb, Gd and Ho, RH: 2 to 10 mass%, B: 0.89 to 0.95 mass%, Ti: 0.1 to 0.2 mass%, Ga: 0.3 to 0.7 mass%, Cu: 0.07 to 0.50 wt%, Al: 0.05 to 0.50 mass%, M: 0 to 0.3 mass%, where M is Nb and / or Zr, Remainder T and unavoidable impurities, where T is a transition metal element and necessarily includes Fe, satisfying the following inequalities (1), (2) and (3): [T] − 72.3 ([B] − 0.45 [Ti]) > 0 ([T] − 72.3 ([B] − 0.45 [Ti])) / 55.85 < 13 [Ga] / 69.72 [ Ga ] ≥ [ Cu ] where [T] is the content of T, expressed in mass%, [B] is the content of B, expressed in mass%, [Ti] is the content of Ti, expressed in mass%, [Ga] is the content of Ga, expressed in mass%, and [Cu] is the content of Cu, expressed in mass%.

The application provides a method for improving the room temperature / high temperature strength and high temperature durability of a 3D printed aluminum alloy, by adding at least one of La, Ce, Er, Ti and Zr elements in the alloy material, on the one hand, primary Al 11 La3, Al3Ti, Al3Zr second phase particles play the role of heterogeneous nucleation, promote the formation of equiaxed grains in the printing process, reduce the formation of columnar grains, and achieve the effect of refining grains; on the other hand, the secondary nano Al 11 La3, AlCe, Al3Er phase has good thermal stability, can produce dispersion strengthening and improve the high temperature structure stability. Under the action of primary and secondary second phases, the dislocation movement is inhibited, the structure stability is improved, and finally the room temperature / high temperature tensile strength, yield strength and high temperature durability are improved.

The invention provides an Al-Zn-Mg-Cu series aluminum alloy special for friction stir welding additive manufacturing and a method for preparing an additive printing piece through the Al-Zn-Mg-Cu series aluminum alloy, and belongs to the technical field of additive manufacturing of alloys. The Al-Zn-Mg-Cu series aluminum alloy for friction stir welding additive manufacturing, provided by the invention, is prepared from the following element components in percentage by mass: 5 percent to 11 percent of Zn, 1 percent to 2.5 percent of Mg, 1 percent to 2.2 percent of Cu, 0.1 percent to 1 percent of Zr, 0.1 percent to 1.5 percent of Sc, 0.1 percent to 1.2 percent of Ce, 0.1 percent to 1.5 percent of Yb and the balance of Al. According to the friction stir welding additive printing piece of the Al-Zn-Mg-Cu series aluminum alloy, the density can reach 99.99%, the yield strength can reach 500-530 MPa at the room temperature, the tensile strength can be kept at 550-590 MPa, meanwhile, the elongation at break can be kept at 15-20%, and the good elongation can still be kept while the good strength is kept.

Provided is a sputtering target having a high level of compositional uniformity. The sputtering target is formed of a noble metal alloy that is formed of 5 or more noble metal elements and exhibits an X-ray diffraction spectrum in which a number of peaks observed in a diffraction angle 2θ range of 38° to 44° is 1.

A method for manufacturing a rolling or sliding bearing ring (1) is disclosed, comprising: - forming (S2) a metallic ring element (1) by depositing metal using a directed energy deposition (DED) process; and - applying (S3) a load-bearing surface (11) to the formed metallic ring element (1') using a further DED process.

Disclosed are methods of forming articles from magnesium alloys using additive manufacturing (e.g., binder jet additive manufacturing) that involve a liquid sintering process. These methods can utilize a shortened liquid sintering process while still producing articles having improved properties including corrosion resistance. Also described are articles formed by these methods.

The invention relates to a shoe sole accessory based on breathable metal machining and a preparation method thereof, a shoe sole and a shoe, and belongs to the technical field of shoe sole accessories, the accessory comprises a breathable metal accessory body integrally formed through 3D printing, a breathable part with evenly-distributed through breathable holes is formed in the breathable metal accessory body, and open holes are formed in the periphery and the fixing position of the accessory; the preparation method comprises the following steps: performing 3D printing and sintering to obtain a metal fitting, positioning the metal fitting as an insert, and injecting a TPU material for coating and fixing; the invention further provides a shoe sole and a shoe integrating the accessory, the ultra-thinness and high air permeability of the accessory are achieved through 3D printing, the contradiction that a traditional accessory is heavy and insufficient in strength is solved, and the air permeability efficiency, wearing comfort and durability of the shoe product are remarkably improved.

In order to enhance circularity while suppressing a decrease in average particle diameter, the range of area envelopment degree of a starting raw material in which the degree of decrease in the average particle diameter of a metal powder between before and after spheroidization is within a predetermined allowable range is identified in advance (S1), and the spheroidization is performed using, as the starting raw material, a metal powder having an area envelopment degree within the identified range of area envelopment degree (S2).