29 results about "Gold alloy" patented technology

The invention discloses a 18K gold luster imitation gold alloy suitable for the sculpture field and a preparation method thereof, the 18K gold luster imitation gold alloy comprises the following basic components in percentage by weight: 20-22% of zinc, 10-20% of copper, 10-20% of zinc, 10-20% of copper, 10-20% of copper and 10-20% of zinc. 3%-4% of aluminum; 2%-3% of silicon; 0.9% to 1.9% of nickel; 0.1% of rare earth, and the balance copper and inevitable impurities. The method has the beneficial effects that one-time forming can be directly carried out through conventional copper art sculpture machining modes such as casting and forging, follow-up complicated procedures such as gilding and gilding are not needed, the sculpture production period is greatly shortened, the manual operation difficulty is reduced, and the 18K gold appearance is accurately matched.

The application relates to a method for improving the density of a platinum-based powder metallurgy alloy, which realizes the purpose of reducing the porosity of a precious metal powder metallurgy alloy ingot and improving the material density through vacuum melting, powder preparation, resonance compaction, liquid phase sintering, controlled forging and other processes. The above process is adopted, the high-temperature endurance strength and toughness of the platinum-based powder metallurgy alloy are greatly improved, the high-temperature service life of the product is significantly enhanced, and good economic benefits are brought.

The invention belongs to the technical field of welding material design and optimization, and discloses a nickel-based alloy welding rod for a low-temperature service environment and a component design method of the nickel-based alloy welding rod. The welding rod comprises a pure nickel core wire and a coating with a specific formula, the coating comprises CaCO3, CaF2, Cr, Mo, Mn, Si-Fe alloy, Mo-Fe alloy, Nb-Fe alloy and other components, and the mass ratio Cr / Nb of chromium to niobium in deposited metal is controlled to range from 9.16 to 11.68. The invention further provides a corresponding component design method, Cr / Nb is identified as key parameters by constructing a BP neural network model and establishing a mapping relation between chemical components and mechanical properties, and the optimal range of Cr / Nb is reversely deduced through an optimization algorithm. The nickel-based welding rod with high strength (greater than or equal to 680MPa) and high toughness (impact energy greater than or equal to 70J) at the temperature of-196 DEG C can be rapidly and accurately designed, and the nickel-based welding rod is particularly suitable for welding 06Ni9DR and other low-temperature steel.

1. Title of the invention Method and system for calculating and controlling the remelting temperature of multi-component alloys 2. Technical field The invention relates to a method for determining and controlling the remelting temperature of alloys in metallurgy, in particular for industrial smelting technology and metal recycling. 3. State of the art Existing methods are based on experimental measurements with stepwise temperature increases, which is energy-intensive and environmentally damaging. 4. Object of the invention The aim is to calculate the remelting temperature based on the chemical composition in order to use energy in a targeted manner, optimize the melting process and reduce environmental impact. 5. Solution to the task The procedure includes: 1. Analysis of the alloy composition, 2. Retrieving melting points from a material database, 3. Calculation of the remelting temperature using the mathematical formulas listed in this patent, 4. Real-time temperature monitoring, 5. Computer-aided control of energy supply. 6. Software can automate the process. 6. Key advantages 1. Reduced energy consumption, 2. Faster melting processes, 3. Improved process control, 4. More efficient metal recycling. 7. Areas of application Use in metallurgy, production and recycling of alloys, and in foundries.

The present invention provides a connection structure comprising: a first circuit component having a plurality of first electrodes; a second circuit component having a plurality of second electrodes; and an intermediate layer having a plurality of junctions electrically connecting the first electrodes and the second electrodes, wherein at least one of the first electrodes and the second electrodes connected by the junctions is a gold electrode, and more than 90% of the plurality of junctions include: a first region connecting the first electrodes and the second electrodes and containing a tin-gold alloy; and a second region in contact with the first region and containing bismuth.

The application discloses a mold for preparing high-porosity spherical porous titanium alloy, which comprises an upper mold punch and a lower mold punch provided with upper half-sphere grooves and lower half-sphere grooves; the upper half-sphere grooves are communicated with each other through upper mold flow channels; and the upper mold punch is further provided with a feeding flow channel. In addition, the application further discloses a preparation method of the high-porosity spherical porous titanium alloy. After titanium powder and other metal element powders are mixed and annealed, the titanium powder is mixed with a binder, and then a spherical blank is prepared by using injection molding equipment and the mold; the spherical blank is subjected to degreasing, sintering and gas suspension smelting in sequence to obtain the high-porosity spherical porous titanium alloy. The porous titanium alloy prepared by the application has high sphericity, smooth surface and relatively dense spherical wall, and the porosity can be controlled according to application conditions, so that the application demands in different fields are met. In addition, the application uses element powder in-situ alloying to prepare the spherical porous titanium alloy, the alloy composition can be freely designed, and batch production can be easily realized.

The invention discloses a gear reducer for an electric drive system of a new energy automobile, which belongs to the technical field of electric drive parts of the new energy automobile and comprises a shell, an input shaft, an output shaft and at least two stages of reduction gear sets arranged between the input shaft and the output shaft. The core innovation points of the gear are as follows: high-alloy carburizing steel or high-strength powder metallurgy alloy is adopted as a gear base material, and carburizing fine grinding and surface strengthening processes such as PVD (Physical Vapor Deposition) coating and laser cladding ceramic layer are combined, so that the hardness, the wear resistance and the antifriction performance of the gear are greatly improved, and the pain points of easy wear and fatigue failure of a tooth surface are solved; meanwhile, the tooth shape of the gear is optimized, the tooth profile with the high contact ratio and the low meshing force angle is adopted, low-viscosity synthetic lubricating oil is matched, an oil way is optimized, and friction and energy loss are reduced; a cooling cavity is integrated in the shell, so that the optimal working temperature of components is guaranteed; the high-performance wear-resistant gear has excellent wear resistance, high transmission efficiency and stability, can reduce the energy consumption of an electric drive system, improves the endurance of a vehicle and the reliability of a power system, and meets the high-performance requirement of a new energy vehicle.

The application discloses a method for producing low-oxygen-content molten steel by adopting an EF+LFV process, wherein 20-30% of weight of slagging materials of smelting raw materials is added with carbon-increasing materials, so that the carbon content of the smelting raw materials reaches 1.20-1.50% of the weight of the smelting raw materials, the oxidation end point temperature is controlled to be greater than or equal to 1630 DEG C, and the carbon content at the oxidation end point is not less than the lower limit of the carbon content required by the smelted steel minus 0.05%; Si-Mn alloy, Si-Fe alloy and carbon-increasing agent are sequentially added into a refining ladle when tapping; and the molten steel is slagged and wire-feeding deoxidized during the refining period; and the molten steel produced by adopting the method has an oxygen content of less than or equal to 20 ppm, so that the purity of the molten steel is ensured to be high, and the production requirements are met.

This application discloses a method for manufacturing aluminum alloy wire and aluminum stranded wire, relating to the field of aluminum alloy stranded wire manufacturing technology. The method involves selecting aluminum ingots, magnesium ingots, Al-20Si alloy, Al-20Cr alloy, Al-10V alloy, and lanthanum-cerium mixed rare earth elements as raw materials and smelting them to form an aluminum alloy melt; refining the aluminum alloy melt with inert gas and / or refining agents through in-furnace impurity removal; introducing the aluminum alloy melt into a flow channel integrated with an electromagnetic purification device for external online impurity removal; casting the aluminum alloy melt into an ingot plate, and repeatedly rolling the ingot plate a predetermined number of times using a cumulative rolling method to form an aluminum alloy rod, which is then continuously quenched; allowing the aluminum alloy rod to stand for a predetermined time before drawing it into an aluminum alloy wire, which is then aged to obtain the aluminum alloy wire. Through the above manufacturing method, aluminum alloy wire that meets single-wire tensile strength requirements and has higher conductivity can be prepared with fewer material components.

A high-thermal conductivity composite material is AlNp / ZA27 composite material, including 2%, 4%, 6%, or 8% by volume of aluminum nitride (AlN) ceramic particles and zinc-aluminium-27 (ZA27) alloy. The ZA27 alloy includes 70.52-71.08% by weight of Zn, 25.58˜27.65% by weight of Al, 1.27˜3.45% by weight of Cu, and 0.50% or less by weight of Mg. In the preparation of the high-thermal conductivity composite material, an as-cast AlNp / ZA27 composite material is subjected to homogenizing annealing and reciprocating extrusion.

Method for manufacturing a bipolar plate (2), comprising the following steps: - Provision of two steel half-sheets (3, 4), wherein at least one of the two half-sheets (3, 4) has an embossed structure (5), - Construction of a three-dimensional metal structure (7) from a first powder (12) of a metal different from the steel of the half-sheets (3, 4) or from at least two powders (12) of different metals, wherein at least one first powder of the at least two powders (12) is selected to be different from the steel of the half-sheets (3, 4), wherein the metal is selected from the group comprising titanium, titanium alloys, nickel, nickel alloys, chromium, chromium alloys, ferrochrome alloys, copper, copper alloys, gold, gold alloys, platinum, platinum alloys, silver, silver alloys, iridium, iridium alloys, rhodium, rhodium alloys, ruthenium, ruthenium alloys, palladium, palladium alloys, on a first half-sheet (3) of the two half-sheets (3, 4) by means of a laser (10) with green laser light and consequently a wavelength in the range of 495 nm to 550 nm, wherein the first Powder made from the metal copper is used.wherein, when using at least one further different second powder, a further laser in the form of an infrared laser is used to build up the three-dimensional metal structure (7), and , - Forming a materially bonded connection of the 3D metal structure (7) with a second half-sheet (4) of the two half-sheets (3, 4) using the same laser (10) with green laser light, wherein the half-sheets (3, 4) are joined to form a bipolar plate (2).

To provide an Au alloy that includes an Au-based hypermaterial and that achieves higher hardness than the prior art while retaining a high Au content.SOLUTION: The present invention relates to a high-hardness Au alloy including an Au-rich phase and an HM phase composed of an Au-X-RE-based hypermaterial represented by the following formula. In the Au alloy according to the present invention, in a material structure at an arbitrary cross section, the Au-rich phase having an average equivalent circle diameter of 1.5 μm or less is distributed. In the above formula, X is at least one atom selected from the group consisting of Al, Ga, In, Si, Ge, and Sn. RE is a rare earth element. a represents a content of X in atom%, and satisfies 5≤a≤40, and b represents a content of RE in atom%, and satisfies 11≤b≤18.SELECTED DRAWING: Figure 1

The invention provides a bipolar current collector and a preparation method and application thereof. The bipolar current collector sequentially comprises an aluminum layer, a buffer layer and a copper layer, the buffer layer is made of alloy, the alloy comprises at least one of Ni-W alloy, Ni-P alloy, Co-W alloy and Fe-Cr-B alloy, the thermal expansion coefficient of the alloy is 9-16 (* 10 <-6 > / K), and the microhardness of the alloy is 600-1300 HV. The bipolar current collector can effectively solve the problem that the interface bonding strength of the copper layer and the aluminum layer in the existing bipolar current collector is weak, so that the conductivity, the mechanical strength and the electrochemical stability of the bipolar current collector can be effectively improved.

The application provides a method for continuously determining gold, silver, copper, lead and zinc in a gold-based alloy, and belongs to the technical field of gold alloy element content detection. The method is based on the combination of the weight method, the electrolysis method and the titration method, and is based on the chemical means such as extraction, back extraction, electrochemistry and complex reaction, and through one-time sample weighing and sample digestion, the continuous and accurate determination of gold, silver, copper, lead and zinc in the gold-based alloy can be realized, the efficiency is improved, the complexity of multiple treatments is reduced, and the method is accurate and reliable. Through the targeted selection of different masking agents, buffer reagents and precipitating agents used one by one in one solution, the problems of unsuitable element method, determination out of range and mutual interference between elements are solved.

The application provides a kind of firebrick for steelmaking furnace lining and a preparation method thereof, and the firebrick comprises the following components and the mass percentage of each component is as follows: 35-40% of macrocrystalline fused magnesia; 20-25% of coarse fused magnesia; 15-20% of fine fused magnesia; 4-8% of fused spinel; 4-8% of sintered spinel; 4-8% of bimodal alumina; 5-10% of AlSi12 alloy; 2-5% of Al-Mg alloy; and 2-5% of boron carbide, and the sum of the mass percentages of the components is 100%. The firebrick can be used in steel desulfurization smelting, is suitable for different desulfurization requirements and different smelting conditions, and has the advantages of long service life, good corrosion resistance and peeling resistance.

The present application relates to the technical field of serum cancer detection technology. The surface-enhanced Raman scattering alloy substrate, its preparation method and application, by using electron beam evaporation deposition on a single crystal silicon substrate, silver gold nanorod array is obtained, which has good discrete silver gold alloy nanorod array film. The preparation method has the characteristics of simple process, and the doped gold element also has good surface-enhanced Raman performance, which will not have too much influence on the overall Raman enhancement performance of the substrate; therefore, the nanorod array of the prepared surface-enhanced Raman scattering alloy substrate has good discrete, good Raman enhancement effect, and also has certain biocompatibility. As a surface-enhanced Raman scattering alloy substrate for serum detection, the technical effect of effectively improving the stability of the substrate for serum detection while maintaining good surface-enhanced Raman effect is achieved.

The application discloses a heat treatment method for generating an ultrathin corrosion-resistant oxide layer on the surface of an Au alloy, and comprises the following steps: loading the gold alloy into a closed container, repeatedly washing the inside of the closed container with inert gas, making the oxygen partial pressure in the closed container 20-500 Pa, and introducing inert gas as protective gas; annealing the closed container containing the gold alloy, the annealing temperature is 500-600 DEG C, and the annealing time is 3-10 h; other elements in the gold alloy can form a dense oxide layer and can form a single-phase intermetallic compound with Au. The composition ratio of the Au-containing alloy itself is not changed, and the corrosion resistance is improved only by controlling the annealing conditions, so that the application has strong applicability in the field of energy storage equipment and other fields where noble metals are used more.

The application discloses a Ce-containing ingot preparation method for improving purity of high-temperature alloy for ultra-supercritical thermal power generating unit, which comprises the following materials: Ni, C, Fe, Mo, NiW alloy, Co, Cr, NiCe alloy, Al, Ti, NiB alloy, and comprises the following steps: S1, batching, alloy materials are weighed according to the component requirement of high-temperature alloy ingot for ultra-supercritical thermal power generating unit; S2, vacuum induction melting, comprising: 2.1, initial melting: Ni, C, Fe, Mo, NiW alloy, Co and Cr alloy materials are sequentially loaded into a furnace, vacuum is drawn and power is increased to full melting temperature, so that the raw materials are dissolved; 2.2, degassing period: power is increased to refining temperature, vacuum is drawn to keep a high vacuum degree in the vacuum induction furnace for a certain time, and electromagnetic stirring is applied during the period; the high-temperature alloy ingot is smelted by the process of vacuum induction melting + vacuum consumable remelting, and the ingot with uniform composition, O≤0.0003% and S≤0.0010% is prepared through rare earth Ce addition and alloying sequence control.

1. Name of the designed product: gold smelting machine. 2. Use of the designed product: machine for smelting, precious metal, gold, silver, copper, platinum, alloy, etc. 3. Design points of the designed product: shape. 4. Picture or photo best showing the design points: perspective view.

The application discloses a high-strength medium-thin-specification wear-resistant steel plate NM600 and a production method thereof, and belongs to the field of metallurgy, alloy or non-ferrous metal processing. The chemical components of the steel plate and mass percentage are as follows: C: 0.35-0.4%, Si: 0.4-0.75%, Mn: 1.0-1.80%, Cr: 0.9-1.1%, Mo: 0.5-0.7%, Nb: <=0.0255, P: <=0.020%, S: <=0.010%, Als: >=0.010%, B: 0.0005-0.0060%, and the balance is Fe and inevitable impurities. The thickness of the steel plate is 2.0mm-12.0mm, and the width is 1500mm-2000mm. The reasonable design of C, Mn and Cr can effectively reduce the content of valuable alloy Ni and Mo without reducing the mechanical properties, so that the cost is reduced.

The sliding member of the present application includes a bearing alloy composed of a Cu-Sn alloy containing 1.5 to 10 mass% of Sn, the remainder being Cu and impurities, and having a Sn concentration of 1.1 times or more the average Sn concentration of the Cu-Sn alloy from a cross section perpendicular to the sliding surface, an area of 500 μm 2 The above high tin concentration regions are dispersed, and the number of high tin concentration regions is 5 to 93 per 1 mm 2 2.

This application relates to the field of nickel-metal hydride battery technology, and more specifically, to a method for preparing and applying a low-cost, high-cycle-stability hydrogen storage alloy. The method includes the following steps: (1) preparing a La-Y-Ni alloy; (2) alloy annealing: heating the La-Y-Ni hydrogen storage alloy prepared by vacuum induction melting from room temperature to 950-1000℃, and performing a high-temperature annealing treatment at that temperature for 12-24 hours; (3) composite material preparation: placing MoS2 and alloy powder in a ball mill jar at a mass percentage ratio of 1-5:95-99, with a ball-to-material ratio of 97-103:1, introducing protective gas, and ball milling for 2-6 hours to obtain a MoS2 / La-Y-Ni low-temperature hydrogen storage alloy composite material. This method is simple, low-cost, and can effectively improve the discharge performance of the battery, resulting in a stable hydrogen storage alloy material.

The invention provides a composite coating for the inner wall of a charging barrel of a die-casting machine and a preparation method of the composite coating, and relates to the technical field of material repair. The preparation method comprises the following steps: cladding first alloy powder on the inner wall of a charging barrel of a die casting machine through a first ultra-high-speed laser cladding process to obtain a heat bearing layer; cladding second alloy powder on the surface of the heat bearing layer through a second ultra-high-speed laser cladding process to obtain a wear-resistant and corrosion-resistant layer; wherein the first alloy powder is one or a mixture of a plurality of materials selected from a Ni-Cr-B-Si alloy, a Ni-Cr-B-Si-Mo alloy, and a Ni-Cr-B-Si-Mo-Nb alloy; and the second alloy powder comprises nickel base alloy powder, carbide ceramic powder, cobalt-coated Cr3C2 or nickel-coated Cr3C2 powder, AlCrTiVSi high-entropy alloy powder and Y2O3 powder. According to the scheme based on the composite coating, the service life of the die-casting machine charging barrel can be prolonged.

The invention discloses a composite welding structure and a preparation method thereof, the composite welding structure comprises a workpiece and a welding joint fixedly welded with the workpiece, and at least the surface of the welding joint is provided with a plating layer; the welding flux used by the welding joint comprises any one or more of a copper welding flux, a copper alloy welding flux, a silver welding flux, a silver alloy welding flux, a gold welding flux and a gold alloy welding flux. The metal coating at least comprises a nickel coating or a nickel alloy coating. The composite welding structure has excellent strength, toughness and corrosion resistance, and the contradiction that Ni is brittle in welding and materials are not resistant to corrosion is solved.

The invention belongs to the field of laser 3D printing nickel-based alloy materials, and particularly provides a laser 3D printing manufacturing method of a high-thermal-conductivity high-temperature alloy. The manufacturing process comprises the steps that GH4169 and CuCrZr alloy powder are mixed, a laser powder bed is adopted for fusion printing, and a printing state nickel base alloy is obtained; the GH4169 alloy powder comprises the following components in percentage by mass: less than or equal to 0.08% of C, 15.0-25.0% of Cr, 50.0-55.0% of Ni, 2-4% of Mo, 4-6% of Nb, 0.8-1.2% of Ti, 0.3-0.7% of Al and the balance of Fe; and the CuCrZr alloy powder comprises the following components in percentage by mass: 0.3 to 0.8 percent of Cr, 0.3 to 0.6 percent of Zr and the balance of Cu. The adding proportion of the CuCrZr alloy powder is 10%-20%; the printing technology specifically comprises the steps that the laser power ranges from 200 W to 400 W, the scanning speed ranges from 600 mm / s to 1500 mm / s, the scanning distance ranges from 0.08 mm to 0.15 mm, and the layer thickness ranges from 80 micrometers to 120 micrometers. Compared with the GH4169 without adding the CuCrZr alloy powder, the heat conductivity of the alloy is improved while the strength of the GH4169 is not reduced, and the alloy has a wide application prospect.

The invention discloses a composite welding structure and a preparation method thereof, the composite welding structure comprises a workpiece and a welding joint fixedly welded with the workpiece, and at least the surface of the welding joint is provided with an anti-corrosion layer; the welding flux used by the welding joint comprises any one or more of a copper welding flux, a copper alloy welding flux, a silver welding flux, a silver alloy welding flux, a gold welding flux and a gold alloy welding flux. And the anti-corrosion layer is made of an organic polymer material. The composite welding structure has high strength, high toughness and high corrosion resistance, and the contradiction that Ni is brittle in welding and materials are not resistant to corrosion is solved. And meanwhile, compared with a metal coating, the scheme has lower cost and environmental pollution.

The application discloses a high-zinc aluminum alloy welding wire and a preparation method thereof and a welding method of a high-strength aluminum alloy plate, and the preparation method comprises the following steps: 1) Al is heated to 770-780 DEG C by using a smelting furnace, the temperature is reduced to 710-720 DEG C after the Al is sufficiently melted, then Al-Si alloy, Al-Cu alloy, Al-Fe alloy, Al-Mn alloy and Al-Ti-B alloy are sequentially added, and Zn and Mg are sequentially added after the Al-Ti-B alloy is completely melted; 2) after all the raw materials are sufficiently melted, refining and deslagging are carried out, and the melt is poured into a water-cooled copper mold to solidify after the melt temperature is stably kept at 690-720 DEG C; 3) the zinc aluminum alloy prepared in the step 2) is heated to 500-540 DEG C, and then the zinc aluminum alloy is subjected to softening annealing at 400-440 DEG C, and the high-zinc aluminum alloy welding wire is prepared by hot extrusion. The welding method of the high-strength aluminum alloy plate improves the solid solution content of the zinc element in the alpha-Al at room temperature, and effectively solves the problem of weld softening through solid solution strengthening.

The present invention provides a tin-gold alloy that has a silvery-white metallic luster, flexibility, oxidation resistance, and corrosion resistance, as well as improved tensile strength. [Solution] A tin-gold alloy consisting of 90% to 99% by mass of tin, 1% to 10% by mass of gold, and the remainder being unavoidable impurities.

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.