15 results about "Cobalt based alloy" patented technology

This invention relates to the field of circuit material processing technology, and in particular to a high-performance buried resistive copper foil and its preparation method. The buried resistive copper foil is composed of an electrolytic copper foil layer, a barrier layer, a resistance alloy layer, and a cobalt-based alloy seed layer. The cobalt-based alloy seed layer is a cobalt-tantalum-iridium-molybdenum alloy. The resistance alloy layer is an alloy composed of two or more elements selected from nickel, chromium, aluminum, silicon, phosphorus, cobalt, tin, tantalum, iridium, and molybdenum. The barrier layer is an alloy composed of one or two elements selected from nickel, chromium, aluminum, silicon, phosphorus, cobalt, tin, tantalum, iridium, and molybdenum. The preparation method includes the following steps: carrier cleaning, double-sided seed layer preparation, double-sided resistance alloy layer preparation, double-sided barrier layer preparation, hot pressing treatment, and carrier peeling. This invention improves the overall performance of the product through a multi-layer alloy plating structure design; at the same time, it provides an efficient preparation method to achieve simultaneous double-sided preparation and one-time production of two sheets of buried resistive copper foil, significantly improving production efficiency and reducing production costs.

The application discloses an anti-abrasion cobalt-based cladding powder, an ultrafine lamellar eutectic cobalt-based coating and a preparation method, and belongs to the technical field of anti-abrasion and anticorrosion alloy coating. The cladding powder comprises 15.0-20.0% of Ni, 14.0-15.0% of Cr, 22.0-25.0% of Mo, 2.7-2.9% of Si and 0.07% or less of C, and the rest is Co, in percentage by mass. The application utilizes the difference in mixing enthalpy of a specific content of Ni element and other elements in the cobalt-based alloy system, changes the non-equilibrium solidification path in laser cladding, suppresses the excessive precipitation and growth of Laves phase, and forms a Laves phase / (gamma-Co / Ni) lamellar ultrafine eutectic structure with excellent strength and toughness. Compared with the prior art, the application can significantly reduce the crack sensitivity of the coating without sacrificing the comprehensive performance of the coating in abrasion resistance and corrosion resistance.

This invention belongs to the field of surface engineering of metallic materials and powder metallurgy technology, specifically relating to a surface composite layer for powder metallurgy components, its preparation method, and its application. The preparation method of the surface composite layer includes the following steps: uniformly mixing a base metal powder, pressing it into shape to obtain a powder metallurgy preform blank; mixing a reinforcing phase material, a binder, a dispersant, and an organic carrier to prepare a composite reinforcing slurry; coating the composite reinforcing slurry onto the surface area of ​​the preform blank requiring reinforcement; and heat-treating the coated preform blank to obtain the surface composite layer for the powder metallurgy component. The base metal powder includes iron-based, nickel-based, or cobalt-based alloy powders. The powder metallurgy component surface reinforcing layer prepared in this application combines the high hardness and high wear resistance of the reinforcing phase with the toughness and corrosion resistance of the metallic binder phase, making it suitable for surface reinforcement of large, heavy-duty, and complex-shaped powder metallurgy components with extremely high requirements for reliability and durability.

This invention belongs to the field of alloy heat treatment technology, specifically disclosing a heat treatment method for a stamped cobalt-based alloy film, the film itself, and its application. The method includes the following steps: The stamped cobalt-based alloy film is ultrasonically cleaned in ultrapure water for 15-30 minutes, then purged with gas and air-cooled for drying; the obtained cobalt-based alloy film is placed in a protective furnace and heated to 480-520°C, held for 30-60 minutes; after holding, the temperature is further increased to 620-680°C and held for 60-180 minutes; after holding, the protective furnace is cooled to 400-450°C and isothermal aging is performed at this temperature for 120-300 minutes; after holding, the protective furnace is cooled to room temperature, and the cobalt-based alloy film is removed; the obtained cobalt-based alloy film undergoes a second tempering: held at 520-560°C for 4-8 hours to obtain the film.

The application relates to the field of olefin catalysis, and discloses a supported cobalt-based alloy catalyst, a preparation method and application thereof, and a method for diisobutylene hydroformylation, the catalyst comprising a carrier, an active component and an additive, the carrier being SiO2, metal elements in the active component being Co, and metal elements in the additive being Ni; at least part of the metal elements in the active component form nano-alloy particles together with at least part of the metal elements in the additive, and the nano-alloy particles are loaded on the surface of the carrier. The supported cobalt-based alloy catalyst provided by the application has the advantages of simple preparation process, high catalytic activity, easy separation and recovery from a liquid phase, and potential application and industrial production.

The application discloses a preparation method of a high-manganese-steel surface laser cladding high-performance cobalt-based alloy coating and application of the high-manganese-steel surface laser cladding high-performance cobalt-based alloy coating in mine machinery wear-resistant parts, and belongs to the technical field of wear-resistant composite material surface strengthening. The preparation method comprises the following steps: substrate pretreatment, alloy powder preparation, three-dimensional modeling and cladding path planning, argon protection laser cladding, and post-processing. The raw material is strictly controlled to be in a high-purity form with P and S being less than 0.02%, the alloy powder is made into spherical powder through double-stage atomization and annular liquid nitrogen cooling, and the powder is modified by nano Al2O3 to refine grains and improve powder properties. The cladding adopts a spiral path, the post-processing is first air cooling / water mist cooling and then annealing at 380-420 DEG C, and finally polishing is performed, so that the coating has a three-section hardness gradient, the cladding positions of the layers are clear, and the microstructure is an austenite matrix dispersedly combined with carbide phases. The coating has high toughness and hardness and excellent wear resistance, can be adapted to different working conditions of mine machinery wear-resistant parts, the process is controllable, and is suitable for industrial production.

The application discloses a hydrogen evolution catalytic material with a gamma prime phase nano array structure, and the hydrogen evolution catalytic material comprises a cobalt-based alloy base and a nano catalytic layer; the cobalt-based alloy base is a Co-xAl-yW alloy; wherein x and y are atomic percentages, the value range of x is 8-10, and the value range of y is 9-10; the nano catalytic layer is in-situ grown on the surface of the cobalt-based alloy base, the nano catalytic layer has a gamma prime phase nano array structure, and the gamma prime phase nano array structure is composed of gamma prime phase nano units in a rectangular array distribution. The hydrogen evolution catalytic material has high-density active sites and optimized hydrogen evolution reaction kinetics characteristics, has excellent catalytic activity, and realizes the double improvement of acid resistance and long-term stability by relying on the oxidation layer protection and the regular array structure, and fundamentally solves the technical pain point that the activity and stability of traditional non-noble metal catalysts are difficult to be considered.

A method treats an internal surface of a metal part made from a nickel-based or cobalt-based alloy of a primary circuit during an operating cycle of a PWR reactor. The method includes estimating a quantity of nickel discharged into the primary circuit by the metal parts of the primary circuit in contact with water of the primary circuit, during an operating cycle of the reactor; calculating a quantity of magnetite necessary for fixing the whole of the quantity of nickel estimated; forming a treated water by dissolving the quantity of magnetite calculated in the water of the primary circuit when the water has a temperature of between 80° C. and 180° C.; and putting this treated water in circulation in the primary circuit so as to form, on the internal surface of at least one metal part, a layer of a protective oxide to fix the quantity of nickel estimated.

This utility model relates to the field of vacuum pump technology, specifically a vacuum pump with a cladding structure. It includes: a pump housing, the inner cavity of which is provided with a composite layer; the composite layer includes: a pump body layer formed on the inner wall of the pump housing; a cladding layer covering the pump body layer; and a lubricating layer covering the cladding layer. The cladding layer is made of a cobalt-based alloy. The lubricating layer is made of solid molybdenum disulfide. The pump body layer includes: microgrooves formed on the inner wall of the pump housing; microgrids separating adjacent microgrooves; and microprotrusions located at the center of the microgrooves. The cladding layer includes: microspirals formed on the inner wall of the cladding layer. The microgrooves have a bottom area of ​​1 mm². 2 The groove is a regular hexagon with a depth of 0.05 mm. The micro-protrusion has a base area of ​​0.25 mm². 2 The hexagonal boss has a height of 0.05mm. The helix angle of the micro-spiral pattern is 45°. This significantly improves wear resistance and sealing stability.

The present application relates to the technical field of cobalt-based alloy silicon content detection, and particularly relates to a method for detecting silicon content in cobalt-based alloy, wherein the cobalt-based alloy sample is first digested with hydrochloric acid and nitric acid, and the silicon acid is dehydrated by fuming perchloric acid smoke; after washing, the precipitate is burned into silicon dioxide and other impure oxides; then the silicon is converted into silicon tetrafluoride and removed by treatment with sulfuric acid-hydrofluoric acid; the residue is burned again, and the loss in the two burning processes is the weight of silicon tetrafluoride; therefore, the silicon content can be calculated according to the mass difference before and after the silicon removal. The method does not require expensive instruments and equipment, is simple to operate, has low cost, and is highly accurate.

The present application relates to the technical field of metal additive manufacturing, and provides a gamma prime phase strengthened cobalt-based high-temperature alloy for an LPBF process and a preparation method thereof.The gamma prime phase strengthened cobalt-based high-temperature alloy for the LPBF process comprises the following elements: Ni: 27-32%; Ta: 11%-13%; Al: 4-6%; V: 4-5%; Ti: 1-2%; and the balance is Co.The preparation method melts and prepares alloy element materials into cobalt-based alloy spherical powder, places the obtained cobalt-based alloy spherical powder in a laser powder bed fusion printing device, and prepares the cobalt-based alloy spherical powder into a workpiece with a set shape, forms a unique net-shaped gamma prime precipitated phase, breaks the traditional square block L12 morphology structure, and the structure has excellent room temperature and high-temperature mechanical properties.

A method for repairing damage at a damage site on the surface of a nickel- or cobalt-based alloy. The method includes: machining at the damage site; and applying a high entropy alloy (HEA) repair material to the damage site via high velocity oxy-fuel (HVOF) spray, high velocity air-fuel (HVAF) spray, or cold spray.

A mold copper plate of a continuous casting mold or a continuous casting mold includes a base material layer containing copper or a copper alloy; and a coating layer provided on the base material layer. The coating layer includes at least one of nickel, cobalt, a nickel-based alloy, a cobalt-based alloy, or a stainless steel alloy as one component element, and includes an alloy including at least one of a metal nitride, a metal carbide, or a metal oxide as another component element.

This invention discloses a high-strength diamond saw blade tip and its preparation method. The raw materials for the tip include diamond abrasive, cobalt-based alloy powder, nickel powder, electrolytic copper powder, tungsten powder, tungsten carbide powder, rare earth alloy powder, nano-alumina, and modified graphene. The modified graphene is prepared by hydrothermal reaction, freeze-drying, and in-situ carbothermal reduction of graphene oxide, ammonium metatungstate, yttrium nitrate, urea, and a hexacarboxylic acid aromatic compound complexing agent. During preparation, the powders are dried, ball-milled, granulated, pressed, hot-pressed and sintered, and then welded to a steel saw blade substrate. This invention improves the hardness, wear resistance, bending strength, and fracture toughness of the metal matrix by constructing a three-dimensional modified graphene network and forming a nano-reinforcing phase in situ, enhancing the holding force of the diamond abrasive, improving cutting efficiency, and extending service life.

This invention relates to a brake pad, its preparation method, and its application. The brake pad provided by this invention comprises the following raw material components: copper powder, 52-60 parts by weight; iron powder, 7-16 parts by weight; graphite powder, 6-18 parts by weight; ferrous sulfide, 2-6 parts by weight; cobalt-based alloy, 3-8 parts by weight; silicon dioxide, 4-6 parts by weight; and diamond powder, 7-12 parts by weight. The brake pad provided by this invention incorporates diamond and a cobalt-based alloy in its raw material components. Using diamond as an abrasive effectively improves and stabilizes the coefficient of friction. Simultaneously, the cobalt-based alloy forms a continuous oxide layer of 0.1-20 μm at high temperatures. The cobalt oxide softens at high temperatures, resulting in low shear strength. Furthermore, the in-situ regeneration and friction-reducing effect of the oxide prevents the development of the seizing process and reduces wear on the friction pair, thus providing excellent lubrication performance at high temperatures.