140 results about "Cobalt alloy" patented technology

The invention relates to the technical field of cables, and discloses an anti-torsional fatigue and corrosion-resistant wind power cable and a manufacturing process thereof, the anti-torsional fatigue and corrosion-resistant wind power cable comprises a three-phase cable core main body, a dynamic compensation anti-torsion layer, a multifunctional corrosion-resistant barrier layer and an outer sheath, the three-phase cable core main body comprises a stranded conductor, a filling inner layer and an insulating layer; the dynamic compensation anti-torsion layer comprises an incongruous spiral supporting layer and a shape memory alloy compensation layer, and the incongruous spiral supporting layer comprises aramid fiber bundles and a nickel-cobalt alloy wire woven mesh; the multifunctional anti-corrosion barrier layer is arranged on the outer side of the dynamic compensation anti-torsion layer and sequentially comprises an anti-corrosion barrier bottom layer, an anti-corrosion barrier middle layer and an anti-corrosion barrier bottom layer surface layer from inside to outside. Through the gradient composite structure design, the problem of failure of a traditional wind power cable under long-term dynamic load and severe environment is effectively solved, and the torsional fatigue resistance, the corrosion resistance and the environmental adaptability are remarkably improved.

The application provides a preparation method of a platinum-cobalt alloy catalyst, which comprises the following steps: preparing a hexadecyl trimethyl ammonium bromide clear solution; preparing a platinum compound, a transition metal cobalt salt and a dimethyl imidazole dispersion solution; adding the dispersion solution into the hexadecyl trimethyl ammonium bromide clear solution in sequence, stirring, adding a carbon black, a ketchen black, a cabot black or a carbon nanotube slurry, and continuously stirring to obtain a mixed solution I; then centrifuging, vacuum drying and grinding the mixed solution I to obtain an intermediate powder; then performing a different temperature staged calcination on the intermediate powder under a reducing / inert atmosphere to obtain an ordered low platinum-cobalt alloy catalyst powder; and then performing an acid washing, suction filtration, vacuum drying and grinding on the ordered low platinum-cobalt alloy catalyst powder to obtain a catalyst product which can be used in a fuel cell. The platinum-cobalt alloy catalyst prepared by the application can be applied to a proton exchange membrane fuel cell as a cathode oxygen reduction catalyst, and the platinum-cobalt alloy catalyst can improve the utilization rate, catalytic activity and durability of the noble metal Pt in the fuel cell cathode ORR catalyst, and can reduce the manufacturing cost and use cost of the fuel cell.

The application provides a preparation method of a nitrogen-doped carbon-supported platinum-cobalt intermetallic compound catalyst. The method comprises the following steps: (1) stirring and mixing a nitrogen-doped carbon carrier with an alcohol solvent to obtain a uniformly dispersed system A; (2) uniformly mixing a metal precursor with an alcohol solution by ultrasonic mixing to obtain a uniformly dispersed system B; (3) uniformly stirring and mixing the system A and the system B, then performing oil bath heating, and then performing washing and drying to obtain a nitrogen-doped carbon-supported platinum-cobalt alloy; and (4) placing the product obtained in step (3) into a porcelain boat, annealing the product in an inert atmosphere at a high temperature, and cooling the product to room temperature to obtain the nitrogen-doped carbon-supported platinum-cobalt intermetallic compound catalyst. The nitrogen-doped carbon-supported platinum-cobalt intermetallic compound catalyst prepared by the method has a uniform particle distribution and exhibits good catalytic activity and stability in an oxygen reduction reaction (ORR) of a fuel cell.

The invention provides a double-phase high-cobalt alloy strip and a preparation method thereof, and belongs to the field of metal materials. The double-phase high-cobalt alloy strip is composed of the following chemical components of 1.5%-4.0% of Fe, smaller than or equal to 0.2% of C, smaller than or equal to 0.002% of T.O, smaller than or equal to 0.001% of N, 0-1% of Mn, 0.5%-5% of Si, Cr, Mo and a matrix element Co. Wherein Cr and Mo meet the following relational expressions: 20% < = [Cr] + [Mo] < = 25% and 0 < = [Mo] / [Cr] < = 4, in the expressions, [Cr] represents the mass fraction of Cr, and [Mo] represents the mass fraction of Mo. According to the preparation method, a double-phase structure, the inclusion content and a strengthening phase are precisely regulated and controlled through element matching, the room-temperature plasticity and the cold machining capacity are remarkably improved while the high-temperature mechanical properties (such as strength and creep resistance) of the alloy are guaranteed, and synchronous optimization of the machining property and the mechanical property is achieved.

The present invention relates to an alkaline composition for cleaning a substrate comprising i) copper or a copper alloy and ii) cobalt or a cobalt alloy, the composition comprising: a) at least one pH adjuster selected from compounds of formula I 【Chemical 1】 TIFF2026524618000015.tif3368(where Ra, Rb, Rd and Rf are each independently selected from unsubstituted linear or branched C1-C 12 alkyl, Re is selected from unsubstituted linear or branched C4-C9 alkyl; provided that the dashed bond between Re and N is a single bond or a double bond, and when the dashed bond is a double bond, Rd does not exist, Ra, Rb, Re and Rf are joined to form one or more 6-membered or 7-membered rings), b) at least one complexing agent selected from C2-C 12 hydrocarbons having at least two sulfonic acid groups or carboxylic acid groups, c) at least one polymeric dispersant having a mass average molecular weight of 1000 g / mol or more; and d) a solvent containing water and comprising.

The invention discloses a samarium-cobalt magnet and a preparation method thereof. The samarium-cobalt magnet takes low-melting-point alloy powder, samarium oxide powder and samarium-cobalt magnetic powder as raw materials; the component of the samarium cobalt magnetic powder is Sm (Co < 1-a-b-c > Fe Cu Zr < c >) < z >; the component of the low-melting-point alloy is RE1-xMx, RE is one or more of Pr, Nd and Sm, and M is one or more of Cu, Al and Ga. The preparation method comprises the following steps: smelting a samarium-cobalt alloy raw material and a low-melting-point alloy raw material, and sequentially performing coarse crushing, medium crushing and jet milling to obtain samarium-cobalt magnetic powder and low-melting-point alloy powder; mixing samarium oxide powder, low-melting-point alloy powder and samarium cobalt magnetic powder to obtain magnetic powder; sequentially performing magnetic field forming, cold isostatic pressing and low-temperature sintering to obtain a sintered blank; and the sintered blank is sequentially subjected to solution treatment and aging heat treatment. The bending strength and the fracture toughness of the samarium-cobalt magnet are greatly improved, and the samarium-cobalt magnet has high magnetic performance and good mechanical performance.

The presently claimed invention relates to an alkaline composition for cleaning a substrate comprising i) copper or copper alloy and ii) cobalt or cobalt alloy, the composition comprising: a) at least one pH adjustor selected from diglycolamine, 4,4-diethoxy-N,N-dimethyl-1-butanamine, 3-dimethylaminopropan-1-ol, dimethylaminoethoxyethanol, N,N-dimethylisopropanolamine, ethylethanolamine, N-methyldiethanolamine, 2-(2-(methylamino)ethoxy)ethanol, 3-(methylamino)propane-1,2-diol, 2-[2-[2-(2-methoxy- ethoxy)ethoxy]ethoxy]ethylamine, 2-[2-(2-aminoethoxy)-ethoxy]-ethanol, N-butyldiethanolamine, diisopropanolamine, N-methyldiisopropanolamine, monoethanolamine, 3-dimethylamino-1,2-propandiol, 2- amino-1-butanol, 2-(2-(2-(2-aminoethoxy)ethoxy)ethoxy)ethanol, prolinol, 1-methyl-2-pyrrolidinemethanol, 1-methyl-2-pyrrolidinemethanol, 1-methyl-3-pyrrolidinol, 2-amino-2-methyl-1-propanol, N,N-dimethylethanolamine, butylethanolamine, diethylethanolamine, 3-methoxypropylamine, 4-(2-hydroxyethyl)morpholine, 4-(dimethylamino)cyclohexanol, 2-amino-2-methyl-1, 3-propanediol, or diisopropylamine; b) at least one complexing agent selected from C2 to C12 hydrocarbon having at least two sulfonic acid or carboxylic acid groups; c) at least one polymeric dispersing agent having a weight average molecular weight ≥ 1000 g / mol; and d) a solvent comprising water.

The invention belongs to the technical field of fuel cell cathode oxygen reduction catalysts, and particularly relates to a high-dispersion platinum group metal-transition metal mesoporous carbon catalyst and a preparation method and application thereof. The high-dispersion platinum-cobalt alloy mesoporous carbon catalyst is prepared in an ammonia water dipping coprecipitation-confinement reduction mode, the problems that in a traditional platinum-cobalt mesoporous carbon catalyst, the utilization rate of precious metal is low, and stability is poor are solved, efficient catalysis of a fuel cell ORR is achieved, and the application prospect is wide. The prepared high-dispersion platinum-cobalt mesoporous carbon catalyst has an ECSA attenuation rate of less than 10% in a disc electrode three-electrode test after long circulation for 60k circles, and has a potential of 0.678 V and 1.356 W / cm < 2 > in a proton exchange membrane fuel cell (PEMFC) test when the current density is 2000mA / cm < 2 >.

The invention discloses a method for preparing an iron-chromium-cobalt alloy by using cobalt slag and ferrochrome slag, and belongs to the technical field of metallurgy and comprehensive utilization of resources. According to the method, zinc hydrometallurgy byproduct cobalt slag and ferrochrome alloy smelting byproduct ferrochrome slag serve as main raw materials, aluminum blocks and lime are matched, after drying, crushing, fine grinding and mixing are conducted, an aluminothermy self-propagating reduction reaction is triggered through electric auxiliary heating, high-temperature smelting is conducted at the temperature larger than or equal to 1500 DEG C, and finally the ferrochrome cobalt alloy is obtained through slag-metal separation and casting forming. According to the method, high-valued utilization of the dangerous waste residues is achieved, the process is simple, cost is low, energy consumption is low, the obtained alloy is low in carbon content and excellent in magnetic performance (residual magnetism is not smaller than 1.365 T, coercive force is not smaller than 48.63 kA / m, and magnetic energy product is not smaller than 48.26 kJ / m < 3 >), and the method is suitable for the field of permanent magnet materials and related high-end manufacturing.

The invention relates to the technical field of gravity samplers, in particular to a petal structure of a gravity sampler, which comprises a pipe body, the outer side of the top end of the pipe body is sleeved with two support bearings, the outer side of the pipe body is fixedly sleeved with a first fixing hoop, and the outer side of the first fixing hoop is fixedly provided with a wireless remote control device. An electric control hydraulic telescopic rod is fixedly installed at the bottom of the wireless remote control device, and a second sealing piston is fixedly installed at the output end of the electric control hydraulic telescopic rod. According to the scheme, by arranging the first tungsten-cobalt alloy teeth and the second tungsten-cobalt alloy teeth, the petal shovel plate of the structure has a rotary drilling effect, the first tungsten-cobalt alloy teeth and the second tungsten-cobalt alloy teeth which are linearly distributed can enable the petal shovel plate to drill a sampling medium, and the petal shovel plate can be suitable for sampling operation of a soft medium; the anastomotic structure can reduce leakage when the structure is closed and increase the tooth drilling effect when the structure is opened, so that the sampling efficiency is indirectly improved.

The invention is applicable to the technical field of biomass energy catalysis and conversion, and provides a high-activity and high-stability nickel-cobalt alloy catalyst and a synthesis method and application thereof, and the synthesis method comprises the following steps: preparing S-1 zeolite; the preparation method comprises the following steps: mixing S-1 zeolite with an aqueous solution of Ni (NO3) 2.6 H2O and an aqueous solution of Co (NO3) 2.6 H2O for dipping, placing the mixture in a tetrapropylammonium hydroxide solution for hydro-thermal treatment, and performing static calcination to obtain a NixCoyO at S-1 nanocrystal; mixing the NixCoyO (at) S-1 nanocrystal with polymers P123, F127, dopamine hydrochloride and 1, 3, 5-trimethylbenzene, performing ultrasonic dispersion in a mixed solvent of water and ethanol, adding ammonia water for reaction, and collecting NixCoyO (at) S-1 (at) mPDA; and carrying out carbonization and reduction on the NixCoyO (at) S-1 (at) mPDA to obtain the NixCoy (at) S-1 (at) mC catalyst. The prepared catalyst has excellent hydrodeoxygenation performance, vanillin can be efficiently converted into 2-methoxy-4-methylphenol (MMP) under mild conditions, and the yield exceeds 94%.

Disclosed example pressure sensors include: a first body defining a reference pressure cavity; a second body defining a measured pressure cavity and having an inlet configured to receive a fluid; a diaphragm between the reference pressure cavity and the measured pressure cavity, the diaphragm comprising Havar® alloy and having a thickness of 0.010 inches or less; an electrode separated from the diaphragm by a gap to form a capacitance between the electrode and the diaphragm; and measurement circuitry configured to determine a pressure in the measured pressure cavity based on the capacitance.

A method of metallizing a semiconductor for the manufacture of three-dimensional semiconductor devices such as integrated circuits or storage memories. The metallization process includes a step of activating the surface, of a mineral oxide substrate with a noble metal, such as palladium, followed by a step of depositing a nickel or cobalt alloy containing boron and at least one of phosphorus and tungsten by electroless deposition.

A kind of porosity controllable additive manufacturing method of nickel-manganese-tin-cobalt alloy and application of the obtained product.The present application belongs to the field of solid refrigeration.The present application aims at the intrinsic brittleness of nickel-manganese-tin-based alloy,which is difficult to be processed into complex-shaped parts by traditional casting and numerical control processing,limiting its application.Meanwhile,aiming at the problem that the existing additive manufacturing method is easy to produce residual stress and element segregation,which affects the structural integrity and magnetic heat performance of the alloy.The present application uses water-based binder to carry out layer-by-layer spray forming of alloy powder,then adds deoxidizer and manganese powder,and carries out high-temperature sintering under vacuum condition to obtain nickel-manganese-tin-cobalt alloy with controllable porosity.The method of the present application effectively avoids the oxidation of the sample,so that the sample maintains good magnetic-structural characteristics,and obtains nickel-manganese-tin-based alloy with specific porosity,phase transition temperature interval near room temperature,and magnetic heat performance comparable to that prepared by traditional method,which shows broad application prospects in the field of magnetic refrigeration and other fields.

The utility model relates to a wear-resistant bimetallic plate structure which comprises a tungsten-cobalt alloy wear-resistant plate and a steel substrate, and a brazing layer or a high-temperature-resistant epoxy structural adhesive layer is arranged between the tungsten-cobalt alloy wear-resistant plate and the steel substrate. A plurality of bolts are pre-buried in the tungsten-cobalt alloy wear-resisting plate, and one end of each bolt extends to the steel base plate and is pre-tightened through a nut; the embedded depth of the bolt is 1 / 3-1 / 2 of the wall thickness of the tungsten-cobalt alloy wear-resisting plate and is not less than 3 times of the diameter of the bolt; the surface of the bolt is coated with a high-temperature-resistant coating, and the thickness of the high-temperature-resistant coating ranges from 0.1 mm to 0.3 mm. According to the utility model, through the bolt and brazing / cementing composite structure design, the problem that the traditional tungsten-cobalt alloy bimetallic plate is easy to peel off and lose efficacy due to insufficient interface bonding force is solved, the connection strength, reliability and applicability are obviously improved, and the bimetallic plate can stably operate under various complex working conditions.

This invention discloses a surface hardening method for universal joints in screw drills and related universal joints. The method includes: performing heat treatment and finishing on a rough-machined universal joint blank to obtain the universal joint body; after preheating the universal joint body, spot welding a tungsten-cobalt alloy block wrapped with nickel-based brazing filler metal to the wear-resistant contact surface at one end of the universal joint body; spraying nickel-tungsten carbide powder and nickel-coated boron carbide composite powder onto the wear-resistant contact surface to form a hardened layer on the wear-resistant contact surface; after cooling, grinding the sprayed surface to the design dimensions; inspecting the porosity of the ground sprayed surface, filling the porosity with nickel-tungsten carbide powder and nickel-coated boron carbide composite powder, heating and melting to seal the porosity; and after cooling, precision grinding the universal joint to the design dimensions. This invention greatly improves the wear resistance and impact fracture resistance of the universal joint, enabling it to be used in conjunction with other screw drill components resistant to 350℃ high temperatures to form screw drills resistant to 350℃ high temperatures.

This invention discloses a process and coating structure for rare earth modified trivalent chromium pearl chromium plating on zinc alloys. The process includes sequentially preparing a cyanide-free copper plating layer, a cyanide-free copper-zinc alloy plating layer, a high-corrosion-resistant nickel-phosphorus alloy plating layer, a bright nickel-cobalt alloy plating layer, a pearl nickel plating layer, a rare earth modified trivalent chromium pearl chromium plating layer, and an anti-discoloration protective film on a zinc alloy substrate. The rare earth modified trivalent chromium pearl chromium plating process is as follows: chromium chloride hexahydrate 90-130 g / L, potassium chloride 90-160 g / L, ammonium chloride 90-160 g / L, ammonium bromide 18-28 g / L, ammonium formate 40-60 g / L, boric acid 45-65 g / L, rare earth additives 8-12 mL / L, leveling agent 2-4 mL / L, accelerator 1-3 mL / L, plating bath pH 2.5-3.2, plating bath temperature 25-35℃, and cathode current density 8-16 A / dm². The rare earth additives have a synergistic effect on improving the performance of trivalent chromium plating solution. No rust was observed on the surface of the plated parts after undergoing a neutral salt spray test for 132 hours according to GB / T 10125–2021 standard.

The application discloses a kind of recycling methods of waste ternary positive electrode material, belong to lithium battery recycling technical field.The recycling method of waste ternary positive electrode material of the application, comprising the following steps: raw material pretreatment, solvothermal reaction, extraction separation, purification nickel-cobalt alloy, lithium recovery.The recycling method of the application, by the pretreatment under specific pH system, solvothermal reaction and purification process, can the nickel-cobalt element in ternary material be directly converted into nickel-cobalt alloy single element, greatly reduce process flow, reduce material input and energy consumption, realize the efficient recovery of nickel-cobalt alloy and lithium carbonate.In addition, the mild alkaline medium can also avoid the serious corrosion problem caused by strong acid system to equipment, effectively reduce the initial investment and subsequent maintenance cost of equipment, so that the method becomes green recycling method with environmental friendliness and economic competitiveness.

Disclosed example pressure sensors include: a first body defining a reference pressure cavity; a second body defining a measured pressure cavity and having an inlet configured to receive a fluid; a diaphragm between the reference pressure cavity and the measured pressure cavity, the diaphragm comprising Havar® alloy and having a thickness of 0.010 inches or less; an electrode separated from the diaphragm by a gap to form a capacitance between the electrode and the diaphragm; and measurement circuitry configured to determine a pressure in the measured pressure cavity based on the capacitance.

The application discloses a kind of corrosion-resistant iron cobalt alloy strip and its preparation and surface synergistic strengthening method, belong to soft magnetic alloy magnetic material heat treatment field.Corresponding to iron cobalt vanadium alloy magnetic corrosion repulsion, magnetic performance attenuation under salt spray / fuel methanol corrosion, component segregation, annealing difficult to consider magnetic mechanical pain point, optimize Fe-Co-V-Cr-Mo-Nb / Ta / Zr alloy component and build proportioning model;Using double-section vacuum melting, hydrogen homogenization, multi-pass temperature control cold rolling regulation and control grain;Design magnetic and mechanical dual-mode magnetic annealing;Constructing passivation layer-MgO insulation layer-organic-inorganic anticorrosion layer three-layer coating synergistic strengthening.The finished product Bs≥2.2T, Hc≤200A / m, 96h salt spray 150h fuel methanol immersion after magnetic performance attenuation≤3%, adjustable strength, replace VACODUR / VACOFLUX alloy strip, adapt to vehicle-mounted electromagnetic actuator, high-speed motor, ocean device high-frequency transformer scene, mass production stability.

A new MRAM memory cell and a manufacturing method therefor, which relate to the field of data storage. The method includes: sequentially including a reference layer, a magnesium oxide tunnel layer and a free layer in a stacking direction. The free layer sequentially includes an interfacial PMA free layer, a free spacer layer and a bulk PMA free layer in a stacking direction, wherein the interfacial PMA free layer is disposed on the surface of the magnesium oxide tunnel layer; the free spacer layer is configured to ferromagnetically couple the interfacial PMA free layer and the bulk PMA free layer; and the interfacial PMA free layer is at least one of a cobalt-containing alloy layer, an iron-containing alloy layer and a cobalt-iron alloy layer, and the bulk PMA free layer is a manganese-based ternary tetragonal alloy layer. In the present invention, an interfacial PMA free layer and a bulk PMA free layer are combined to provide a higher TMR. In addition, a new manganese-based ternary tetragonal alloy is also used as the bulk PMA free layer, which improves the process compatibility and also improves the data retention capability of a device.

The invention relates to the technical field of household appliances, and discloses a welding method which comprises the steps that powder spraying melting treatment is carried out on the to-be-welded face of a first welding piece, so that an alloy welding layer is formed on the surface of the first welding piece, and the thickness of the alloy welding layer is larger than or equal to 0.5 mm; the alloy powder subjected to powder spraying melting treatment comprises at least one of low-carbon alloy steel, nickel-cobalt alloy steel and iron-based superalloy; and the alloy welding layer and the to-be-welded face of a second welding piece are oppositely arranged, laser penetration welding treatment is conducted on the alloy welding layer and the to-be-welded face of the second welding piece, and welding connection is formed between the first welding piece and the second welding piece. And forming of high-strength welding connection is facilitated.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The invention provides a high-strength and high-conductivity copper-nickel-titanium-cobalt alloy and a short-process preparation method thereof, and belongs to the technical field of copper-based alloys. The alloy comprises the following components: 2.5%-3.5% of Ni; 0.8% to 1.2% of Ti; 0.3%-0.7% of Co; and the balance of Cu and inevitable impurities. The preparation method comprises the following steps: smelting and casting according to alloy components to obtain a cast ingot; and the cast ingot is sequentially subjected to homogenization treatment, hot rolling, cold rolling and aging treatment, the alloy is obtained, and the solid solution treatment step is omitted. Through microalloying of Co element, precipitation of a nanoscale strengthening phase (Ni, Co) 3Ti is promoted, and formation of an unfavorable phase is inhibited; and meanwhile, a short-flow process without solid solution treatment is adopted, and aging precipitation is directly driven by strain energy introduced by hot rolling and cold rolling. The alloy prepared by the method has high strength, high conductivity and good plasticity, is short in process flow and low in energy consumption, and is particularly suitable for the fields of lead frames in the field of electronic appliances and the like.

The utility model belongs to the technical field of cutters, and particularly relates to a wear-resistant tungsten-titanium-cobalt alloy cutter which comprises a cutter handle, an insertion groove is formed in the cutter handle, an installation plate is installed in the insertion groove in an inserted mode, a fixing block is fixedly installed at one end of the installation plate, and a tungsten-titanium-cobalt alloy cutter body is fixedly installed on one side of the fixing block. A through groove is formed in the end, away from the tungsten-titanium-cobalt alloy cutter body, of the cutter handle. The two circular grooves are formed in the knife handle and located below the inserting grooves, the circular grooves are communicated with the through groove, circular plates are arranged in the circular grooves, and springs fixed to the inner walls of the circular grooves are fixedly installed on the sides, away from the through groove, of the circular plates. The first metal polishing rod and the second metal polishing rod can be ensured to be placed in the knife handle, the situation that the holding hand feeling of a user is affected by holding and placing the handle when the user holds the knife handle is avoided, meanwhile, the first metal polishing rod and the second metal polishing rod can be detached and placed in the knife handle after being used, and the situation that the first metal polishing rod and the second metal polishing rod are forgotten to be lost is avoided.

The invention discloses a high-strength tungsten-nickel-iron-cobalt alloy and a preparation method thereof. The preparation method of the high-strength tungsten-nickel-iron-cobalt alloy comprises the following steps that tungsten powder, nickel powder, iron powder and cobalt powder are mixed and subjected to ball milling, compression molding is conducted, and a rod-shaped tungsten-nickel-iron-cobalt alloy blank is obtained; the rod-shaped tungsten-nickel-iron-cobalt alloy blanks are sequentially sintered, and the tungsten-nickel-iron-cobalt alloy is obtained; and the tungsten-nickel-iron-cobalt alloy is sequentially subjected to dehydrogenation, hot extrusion and heat treatment, and finally the high-strength tungsten-nickel-iron-cobalt alloy is obtained. According to the preparation method, the problem that the plasticity of the hot-extrusion-state tungsten alloy is low is solved, the plasticity of the hot-extrusion-state tungsten alloy is improved under the condition that the strength is guaranteed, and the use way of the hot-extrusion-state tungsten alloy is widened.

A light-driven frequency-band tunable electromagnetic shielding device is provided. The device includes photodiodes, photoresistors, square graphite felt films, polyvinylidene fluoride films, nickel-cobalt alloy films, a grounding metal layer, and a silicon substrate layer. The photodiodes are disposed in holes of the square graphite felt films and around the electromagnetic shielding device. Ends of the photodiodes are directly connected to ends of the photoresistors, and other ends of the photodiodes are connected to the square graphite felt films. Other ends of the photoresistors are connected to the grounding metal layer. The polyvinylidene fluoride films are adhered with the square graphite felt films, and the square graphite felt films are adhered with the nickel-cobalt alloy films. The polyvinylidene fluoride films are adhered to the grounding metal layer, and the grounding metal layer is adhered to the silicon substrate layer.

The invention relates to a high-saturation ferrocobalt alloy and a low-temperature high-toughness eddy current braking magnetic pole. The high-saturation iron-cobalt alloy comprises the following components: 16%-18% of Co; 1.4% to 2.2% of Cr; mo: 0 or < = 1.5%; v: 0 or < = 0.4%; and the balance of Fe and inevitable impurity elements. The invention also provides a low-temperature high-toughness eddy current brake magnetic pole which is prepared from the high-saturation iron-cobalt alloy through smelting, forging, heat treatment and machining. According to the high-saturation iron-cobalt alloy and the low-temperature high-toughness eddy current braking magnetic pole prepared from the high-saturation iron-cobalt alloy, the components of the iron-cobalt alloy material are regulated and controlled, so that the magnetic pole prepared from the high-saturation iron-cobalt alloy has high saturation magnetic performance and excellent low-temperature impact toughness.

The utility model belongs to the technical field of tungsten-titanium-cobalt alloy cutters, and particularly relates to a damping tungsten-titanium-cobalt alloy cutter which comprises an installation box and a cutter body and further comprises a limiting groove, the limiting groove is formed in the installation box, the cutter body is installed in the limiting groove in an inserted mode, and a plurality of grooves are formed in the upper side and the lower side of the cutter body respectively. The two limiting blocks are both installed in the limiting groove in a sliding mode and located on the upper side and the lower side of the tool body respectively, one side of each limiting block extends into the corresponding groove, one side of each limiting block is matched with the corresponding groove in an inserted connection mode, and a first threaded rod is rotatably installed in the limiting groove and located above the two limiting blocks; the lower end of the first threaded rod penetrates through the two limiting blocks, a worker can conveniently adjust the length of the part, extending out of the mounting box, of the tool body, operation is easy and convenient, the extending length of the tool body is short, rigidity is high, vibration is weak, and it is ensured that vibration generated when the tool body is used cannot affect work.