95 results about "Co element" patented technology

The invention discloses a high-performance sintered neodymium-iron-boron magnet and a preparation method thereof.The high-performance sintered neodymium-iron-boron magnet is characterized in that raw materials for preparing the neodymium-iron-boron magnet comprise a main alloy and an auxiliary alloy, and the auxiliary alloy does not contain Fe and Co elements; the microstructure of the neodymium-iron-boron magnet comprises a matrix phase and a rare earth-rich grain boundary phase, the matrix phase is (RE / RE ') 2 (F) 14B, F is Fe and Co, the content of Co is 0-3, the mass percent of Fe to RE / RE' in the rare earth-rich grain boundary phase is 1: (1.4-7), RE is Nd or PrNd, and RE 'is one or more of Pr, Ho, Dy and Tb. The neodymium-iron-boron magnet has relatively high magnet magnetic performance.

The application discloses a kind of martensitic age steel of additive manufacturing and preparation method thereof, the martensitic age steel, according to mass percentage, its composition is as follows: Ni 16~22%, Co0-5%, Mo 2~6%, Ti 0.2~2.5%, Al 0~1.5%, Re 0~0.3%, wherein Re is selected from at least one of Y or La, the balance is Fe and inevitable impurities.In the application, by reducing Co element, adjusting the ratio of Ni, Ti and Mo in the alloy, while adding a small amount of rare earth (Y and La) element, the alloy has higher M s Under the premise, the raw material cost of alloy powder and the preparation cost of alloy are greatly reduced, and the fine equiaxed grains and high-density nano precipitates formed after aging are formed by combining with the process parameter control of additive manufacturing, so that the mechanical properties of the martensitic age steel are greatly better than those of the traditional casting process.

The invention discloses an iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. A magnetically soft alloy strip is prepared through smelting and a single-roller melt-spinning method, stress relief annealing is carried out on the magnetically soft alloy strip through assistance of a magnetic field, and then crystallization annealing treatment is carried out. Different from a traditional method for regulating and controlling the magnetic performance of the alloy through precipitation of a large number of nanocrystals, the method only induces precipitation of a very small number of nanocrystals, and high saturation flux density and low coercive force can be obtained while the toughness of the strip is ensured; the iron-based nanocrystalline soft magnetic alloy with high saturation flux density and low coercive force can be prepared by taking Fe as a main element, Co element with the atomic fraction lower than 8%, Cu element with the atomic fraction lower than 1% and at least one of oxygen, sulfur, phosphorus, carbon, silicon, boron and the like as other trace elements.

The invention discloses a multiphase synergistically strengthened copper-titanium alloy, the microstructure of the copper-titanium alloy has the following nano-structures: a cellular structure, a nano laminated structure formed by alternately arranging beta-Cu4Ti phases and alpha-Cu matrix phases, the beta-Cu4Ti phases are lamellar or fibrous beta-Cu4Ti discontinuous precipitated phases, and the alpha-Cu matrix phases are lamellar or fibrous beta-Cu4Ti discontinuous precipitated phases; and the beta '-Cu4Ti continuous precipitated phase is uniformly distributed in the alpha-Cu matrix phase and is in a coherent or semi-coherent relationship with the alpha-Cu matrix phase. The invention further discloses a preparation method of the multiphase synergistically strengthened copper-titanium alloy. On the basis of the comprehensive requirements of the strength and the conductivity of the copper-titanium alloy, the Co element is added to regulate and control the interface energy of the precipitated phase, the distribution of the precipitated phase is optimized, a multi-step process of discontinuous precipitation aging, cold rolling deformation and continuous precipitation aging is combined, and the strength of the copper-titanium alloy is improved through interface strengthening, precipitated phase strengthening and heterostructure induction strengthening effects. And the comprehensive performance superior to that of the copper-titanium alloy prepared in a conventional mode can be achieved.

The invention discloses a composite high-temperature wear-resistant gradient coating special for a titanium alloy knife edge. The composite high-temperature wear-resistant gradient coating comprises a Ni-Ti transition coating, a Co-based alloy coating and a Co-based ceramic composite wear-resistant coating which are sequentially arranged on the surface of the titanium alloy knife edge in a laser cladding mode. The preparation method comprises the following steps: 1, polishing and cleaning a titanium alloy knife edge; 2, Co-based ceramic composite wear-resistant coating powder is prepared; 3, drying the raw material powder; and fourthly, the dried powder serves as raw materials, and laser cladding of a Ni-Ti transition coating, a Co-based alloy coating and a Co-based ceramic composite wear-resistant coating is sequentially conducted on the treated titanium alloy knife edge. By controlling the gradient change of the contents of Ti and Ni elements in the Ni-Ti transition coating, Ti and Co elements are prevented from being combined to form a brittle phase, the cracking sensitivity of the Co-based alloy coating is reduced, and falling is prevented; according to the laser cladding method, the heat input amount is controllable, and the bonding strength of the coating and the titanium alloy knife edge base body is improved.

The invention discloses a nickel-based alloy welding wire and a preparation method and application thereof, and relates to the technical field of alloy welding wires, and the nickel-based alloy welding wire comprises the following element components in percentage by weight: 0.005%-0.05% of C, 0.005%-0.35% of Mn, 0.001%-0.015% of P, 0.001%-0.015% of S, 0.01%-0.4% of Si, 20.5%-24% of Cr, 8.0%-9.6% of Mo, 0.05%-4% of Fe, 3.25%-4.25% of Nb, 0.005%-0.5% of Co, 0.01%-0.35% of Al, 0.01%-0.35% of Ti, 0.001%-0.01% of Ta, 0.001%-0.02% of Cu, 0.12%-0.25% of mixed rare earth elements and the balance of Ni. According to the nickel-based alloy welding wire and the preparation method and application thereof, Ni can form a tough matrix, Co, Cr, Mo and other alloy solid solution strengthening elements, the corrosion resistance of the welding wire is improved, high-temperature oxidation is reduced, and the Co element also improves the thermal stability and manufacturing performance of the welding wire. Precipitation hardening elements such as Nb, Ta, Ti and Al are added, and the rare earth elements Ce and La are added, so that the grain boundary can be purified, and the high-purity nickel-based high-temperature alloy welding wire is obtained.

The invention provides a high-entropy alloy oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalyst materials. The catalyst is an oxide of a high-entropy alloy composed of any three elements of Fe, Mg, Ti and Mo, a Ru element and a Co element. The high-entropy alloy oxide catalyst provided by the invention can catalyze an ammonia synthesis reaction under a mild condition; the catalyst has a relatively high ammonia synthesis reaction rate, so that the utilization rate of the high-entropy alloy oxide catalyst is greatly improved, and the catalyst has a relatively strong industrial application prospect; and meanwhile, the catalyst does not have an obvious inactivation phenomenon after long-time operation, and shows extremely high stability.

The invention discloses a large-size high-strength heat-resistant magnesium alloy pipe and a preparation method thereof, and belongs to the technical field of magnesium alloy. The magnesium alloy pipe is composed of Mg, Er, Co, Zr and other elements, and comprises, by mass, 8.0%-12.0% of Er, 2.0%-3.0% of Co, 0.2%-0.5% of Zr and the balance Mg and other inevitable impurity elements. The heavy rare earth element Er is added, the heavy rare earth element Er has large solid solubility in an Mg matrix, the heavy rare earth element Er and the added Co element can form a long-period ordered structure phase Mg12CoEr phase, namely an LPSO phase, the LPSO phase can be coherent with the magnesium matrix to improve the plasticity of the magnesium alloy, and the LPSO phase distributed at the grain boundary can hinder grain growth, so that the comprehensive mechanical property of the magnesium alloy is optimized.

The invention relates to the technical field of high-entropy alloys, and discloses a high-entropy alloy with high mechanical property and high corrosion resistance and a preparation method thereof, the high-entropy alloy comprises Fe, Cr, Ni, Al and Si, the atomic ratio of Fe to Cr to Ni to Al to Si is 2: x: 1: 0.2: 0.3, and x is more than or equal to 1.22 and less than or equal to 1.26. Elementary substances corresponding to corresponding elements in the high-entropy alloy are used as raw materials, and the high-entropy alloy is obtained through smelting. The high-entropy alloy has excellent mechanical properties and corrosion resistance and is low in cost, no expensive Co element is added, Fe and Cr elements with relatively low cost are added, and the production cost is reduced.

The invention discloses hard alloy welding powder for valve sealing surface surfacing and a preparation method of the hard alloy welding powder. The welding powder comprises 1.20%-1.40% of C element, 2.70%-3.5% of Si element, 3.00%-4.50% of Mn element, 24.00%-26.00% of Cr element, 2.00%-2.20% of Mo element, 3.50%-4.50% of Ni element, smaller than or equal to 0.20% of Co element, smaller than or equal to 0.02% of B element, smaller than or equal to 0.10% of N element and the balance Fe element. The preparation method comprises the following steps: weighing raw materials, mixing and smelting the raw materials to obtain alloy liquid; and the alloy liquid is subjected to gas atomization to prepare powder, and the hard alloy welding powder is obtained after screening. The Co element content is strictly limited, and meanwhile the hardness and other performance can meet the design requirement; the preparation method is simple and reliable in process.

The invention belongs to the technical field of metal materials and processing, and relates to a dissoluble magnesium alloy structure, a material and a preparation method. The magnesium alloy structure comprises nano-sized magnesium alloy grains and metal elements segregated along the grain boundary. The nano-sized magnesium alloy crystal grains comprise magnesium alloy crystal grains with the size of 1-999 nm; the segregation amount of the metal elements comprises 1 to 100 atomic layers; the low-alloying material Mg < n > A E < e > alloy of the soluble magnesium alloy structure is specifically prepared from 0.001 at.%-0.5 at.% of an element A, 0.001 at.%-0.5 at.% of an element E and the balance of an element Mg, wherein the element A is selected from one or more of Al, Zn, Ca, Mn, Zr, Si, Sr and RE elements; and the E element is selected from one or more of Cu, Ni and Co elements. The preparation method of the low-alloying material comprises the processes of alloy casting, machining forming, surface nanocrystallization, heat treatment and the like. The prepared soluble magnesium alloy material has good mechanical property and dissolving property, and can meet the requirement of soluble magnesium alloy required by shale oil and gas development.

The invention provides a positive electrode active material, a preparation method thereof, a secondary battery and an electric device. The positive electrode active material comprises a substrate and a coating layer at least partially covering the substrate, and the positive electrode active material satisfies: W1gt, the mass content of the Co element in the W1 coating layer is calculated based on the mass of the positive electrode active material, and the W2 is the mass content of the Co element in the matrix. The positive electrode active material has high discharge capacity per gram, and a material basis is provided for preparing a high-energy-density battery.

The invention discloses cobalt-chromium-molybdenum alloy powder for laser cladding. The cobalt-chromium-molybdenum alloy powder comprises the following chemical components in percentage by mass: 27.0 to 32.0 percent of Cr, 4.0 to 6.0 percent of Mo, 7.5 to 9.5 percent of Fe, 0.4 to 1.2 percent of Y, 0.1 to 0.4 percent of Zr and the balance of Co element and inevitable impurities. Wherein the mass fraction of Y + Zr is preferably as follows: 0.6% < = Y + Zr < = 1.1%. Wherein the mass fraction of Y + Cr is preferably greater than or equal to 30.0%. The cobalt-chromium-molybdenum alloy powder for laser cladding is low in cost and high in purity, the content of inclusions, oxygen, nitrogen and hydrogen in the powder is reduced, the inclusions are few, the fluidity is excellent, the sphericity rate is high, the physical performance is excellent, especially the corrosion resistance is excellent, and the service life of a cladded product is prolonged. Meanwhile, the invention further provides a preparation method of the cobalt-chromium-molybdenum alloy powder.

The invention provides a polycrystalline Fe-Ni-Co-Al-based superelastic alloy and a preparation method thereof, and belongs to the field of metal materials. According to the preparation method of the polycrystalline Fe-Ni-Co-Al-based superelastic alloy, the strength of an alloy matrix phase is enhanced by properly adding Co, the Co element promotes formation of a high-number-density coherent Ni3Al nanophase, and the Ta element further promotes precipitation of the high-number-density coherent Ni3Al nanophase; the precipitation of NiAl at the grain boundary is inhibited by properly adding B; by combining the composition of the alloy with large-deformation rotary cold rolling deformation and corresponding hot rolling and heat treatment processes, the grain boundary with relatively high texture strength and relatively high and low energy angle grain boundary proportion is prepared; 100 gt; according to the oriented polycrystalline alloy, precipitation of a brittle NiAl phase at a small-angle grain boundary and a coincident lattice grain boundary is inhibited, the overall precipitation number is reduced, and the hyperelasticity of the polycrystalline Fe-Ni-Co-Al-based hyperelasticity alloy is improved.

The invention relates to a 1400 MPa-grade high-cobalt low-tungsten nickel-based alloy for a second-generation high-temperature superconducting baseband and a preparation method of the 1400 MPa-grade high-cobalt low-tungsten nickel-based alloy, and belongs to the technical field of materials. On the basis of the Hastelloy alloy, the Co element with the optimized content is added, solid solution strengthening and TCP phase precipitation restraining are achieved, and the high plasticity of the nickel-based alloy is guaranteed; by increasing the content of Cr, the oxidation resistance of the material is ensured; and the Mo content is reduced, Mo and W elements are promoted to completely enter a matrix in a solid solution mode, no TCP phase precipitation is achieved in the hot rolling process, cracking caused by a residual second phase in the subsequent cold rolling process is avoided, and therefore the preparation technological process of the material is simplified, and the material manufacturing cost is reduced. By adopting the component control strategy, the simplified preparation technology and the heat treatment technology, the nickel-based alloy with the tensile strength being 1400 MPa or above and the elongation being larger than 21.0% can be obtained after annealing is conducted for 5 min at the temperature of 900 DEG C, and the requirement of a second-generation high-temperature superconducting high-performance metal base band is met.

The present invention belongs to the technical field of cemented carbide manufacturing, and discloses a cemented carbide with a cobalt-aluminum intermetallic compound CoAl as a bonding phase and a preparation method thereof. The cemented carbide is composed of a cobalt-aluminum intermetallic compound CoAl as a bonding phase and a hard phase WC. When the molar ratio of the added Co element and the Al element is 1:1 or 3:2, respectively, a cemented carbide with the intermetallic compound CoAl as a bonding phase is obtained. The mixed powder is evenly mixed by ball milling, and then spark plasma sintering is performed to finally obtain a dense cemented carbide with the cobalt-aluminum intermetallic compound CoAl as a bonding phase. The material composition of the present invention is reasonably designed, the preparation process is simple and controllable, the production cost is low, and large-scale industrial production and application are possible.

The invention discloses an iron-based / alpha-Fe amorphous nanocrystalline soft magnetic alloy, which is based on an iron-based amorphous strip mainly comprising Fe element, and contains Co element with atomic fraction of 6%-8%, Cu element with atomic fraction of 0.7%-1%, and the balance of trace elements which are at least one of oxygen, sulfur, phosphorus, carbon, silicon, boron and the like. And carrying out stress relief annealing on the strip with the assistance of a magnetic field, and then carrying out crystallization treatment. Different from a traditional method for regulating and controlling the magnetic performance of the alloy through precipitation of a large number of nanocrystals, the alloy only induces precipitation of a very small number of nanocrystals, and high saturation flux density and low coercive force can be obtained while the toughness of the strip is ensured.

The application belongs to the technical field of gas sensing material preparation, and discloses an Ag / AgCl modified Co3O4 nano-composite material, a preparation method and application, and comprises the following steps: dissolving inorganic compounds of Ag elements and inorganic compounds of Co elements in deionized water, adding a proper amount of NaCl solution first, then adding N2H4.H2O solution, and obtaining Ag / AgCl loaded alpha-Co(OH)2 nanosheet material by using coprecipitation and in-situ reduction method; and drying and sintering the Ag / AgCl loaded alpha-Co(OH)2 nanosheet material to obtain the Ag / AgCl modified Co3O4 nano-composite material. The application provides a preparation method of a low-temperature high-response gas sensing material, the prepared Ag / AgCl loaded Co3O4 material has higher ethanol gas response performance, can significantly reduce the optimal working temperature of the sensing material, has potential application prospect, and can be used for monitoring alcohol pollutant gases in atmospheric environment, chemical plant environment, home environment and the like.

A positive electrode active material, a preparation method thereof, a secondary battery, and an electric apparatus. The positive electrode active material includes a matrix and a coating layer at least partially covering the matrix. The positive electrode active material satisfies: W1>W2, where W1 is a mass content of Co element in the coating layer, and W2 is a mass content of Co element in the matrix, both based on a mass of the positive electrode active material.

The application relates to a feed for metal injection molding, a preparation method of the feed and a metal product, wherein the preparation method of the feed comprises the following steps: S1, obtaining the following components according to weight parts: 40-50 parts of Fe elements, 2-8 parts of Ni elements, 20-25 parts of Cr elements, 20-25 parts of Co elements, 2-8 parts of Mo elements, 2-8 parts of Cu elements, 0.1-3 parts of Si elements, 1-3 parts of Mn elements, mixing and then heating to melt the material, and then adopting a high-pressure water-gas combined atomization method to obtain mixed powder; S2, obtaining a forming agent; S3, preheating the mixed powder obtained in S1 under vacuum conditions, then adding the forming agent into the mixed powder for mixing, and then performing plasticizing extrusion granulation to prepare the feed. The feed can meet the size precision requirements of MIM injection, green compact degreasing sintering and related post-process machining, the existing MIM materials on the market cannot simultaneously meet the problem of high polishable hardness, and the obtained metal product has the comprehensive advantages of appearance and hardness.

The invention discloses copper alloy powder and a method for conducting printing repair on an aluminum bronze workpiece through the copper alloy powder, and belongs to the technical field of alloys and repair of the alloys. The alloy comprises 25-32% of Ni, 12-17% of Co, less than or equal to 1.8% of Mn and less than or equal to 2% of Si. O is less than or equal to 0.03%, and the balance is Cu. By preferably increasing the contents of Ni and Co elements, the wear resistance of the repaired surface and the bonding performance between the matrix and the additive repair layer are improved while the safety in the large-batch preparation and use process of the powder is ensured. The proportion of nickel and cobalt in the alloy is increased, the strength and hardness of the copper alloy can be improved, the nickel and the cobalt hinder dislocation movement in metal lattices through different micromechanisms, in other words, the nickel plays a role through solid solution strengthening, and the cobalt plays a role through precipitation strengthening.

The invention relates to the field of water electrolysis hydrogen production, and discloses a CoZn bimetallic catalyst, a preparation method thereof, a hydrogen evolution electrode and an electrolytic bath. The X-ray powder diffraction pattern of the catalyst has characteristic peaks when 2 theta is 25.94 + / -0.18 degrees, 44.16 + / -0.18 degrees, 51.44 + / -0.18 degrees and 76.26 + / -0.18 degrees; the content of a Co element in the catalyst is 36.3 to 42.7 wt%, and the content of a Zn element in the catalyst is 0.03 to 5.28 wt%; the average particle size of the catalyst is 90-110 nm. The particle size of the catalyst is proper, so that an electrode material with a stable structure can be prepared, and the electrode material is kept constant and stable under a long-time high-current condition. The catalyst with proper size is combined with a proper catalytic layer structure, so that the prepared hydrogen evolution electrode shows excellent activity and efficiency.

The invention belongs to the technical field of high-temperature alloy connection, and particularly discloses novel cobalt-based brazing filler metal for high-temperature dissimilar metal connection and a preparation method and application of the novel cobalt-based brazing filler metal. The cobalt-based brazing filler metal is prepared from, by weight, 30%-70% of Co, 14%-27% of Ni, 11%-20% of Cr, 3%-6.5% of Fe, 1%-1.5% of Mn, 3%-6% of Si, 2%-4% of B, 0.3%-0.5% of Sc, 0.2%-0.4% of Y and the balance inevitable impurities. The melting point of the cobalt-based brazing filler metal ranges from 950 DEG C to 1100 DEG C, and the cobalt-based brazing filler metal is suitable for being used in the high-temperature environment of 600 DEG The method focuses on the refining process and performance evaluation of the Co * NiCrFe (Si, B) cobalt-based brazing filler metal, the content of the Co element is systematically adjusted, the brazing strength of the brazing filler metal is guaranteed, meanwhile, the wettability of the brazing filler metal is improved, composition segregation is reduced, and the process requirement for brazing connection of high-temperature dissimilar metal materials can be fully met.

This invention discloses a carbon nanotube / ZIF-67 derived Co-C / CNT catalytic membrane, its preparation method, and its application. The method involves acidifying carbon nanotubes to immobilize the growth of ZIF-67 on the carbon nanotubes. ZIF-67 serves as the Co source. The carbon nanotube / ZIF-67 composite material is first acidified, then ground with a eutectic mixture, and finally carbonized. This effectively inhibits the aggregation of Co elements in ZIF-67 during pyrolysis, achieving high dispersion of metal active sites while preventing metal ion leaching. This improves the catalytic activity of the Co-C / CNT catalytic membrane, achieving highly efficient PMS activation, effectively inhibiting the loss of Co active components, and preventing Co degradation. 2+ The problem of secondary heavy metal pollution caused by leaching.

The invention belongs to the technical field of medium-entropy alloys, and particularly relates to a medium-entropy copper alloy and a preparation method and application thereof. The medium-entropy copper alloy provided by the invention comprises the following element components in atomic percent: 43%-47% of Cu, 7%-9% of Mn, 6%-8% of Sn, 30%-40% of Ni and 0.1%-10% of Co. According to the medium-entropy copper alloy, an alloy cast ingot is prepared through a smelting technology, and then a finished product is obtained after solid solution and aging. The Co element is introduced into the medium-entropy copper alloy and can inhibit formation and growth of discontinuous precipitated phases in the alloy, so that precipitation of the discontinuous precipitated phases is reduced, an H-L12 phase is uniformly and continuously distributed in an alloy matrix, and the mechanical property of the medium-entropy copper alloy is improved. The medium-entropy copper alloy provided by the invention has extremely high mechanical strength, fracture toughness and wear resistance.

The invention discloses a Ce-doped Co-MOF derived CuO composite oxide catalyst and a preparation method thereof, and belongs to the technical field of catalytic materials. The preparation method comprises the following steps that S1, rare earth waste residues containing Ce elements and Co elements are obtained and treated, and a cerium salt solution and a cobalt salt solution are obtained; s2, the cerium salt solution and the cobalt salt solution are mixed with an organic ligand, and a Ce-Co-MOF precursor is prepared; s3, carrying out calcining and annealing treatment to obtain a Ce-Co-O porous composite oxide carrier; s4, preparing a copper salt solution, impregnating the Ce-Co-O porous composite oxide carrier with the copper salt solution, and then performing drying and calcining treatment to obtain a CuO-coated Ce-Co-O composite oxide; and S5, carrying out surface plasma activation treatment to obtain the Ce-doped Co-MOF derived CuO composite oxide catalyst. According to the invention, high-valued utilization of rare earth resources and precise structural regulation and control of catalytic materials can be realized, and the prepared catalyst can show excellent activity and stability in low-temperature CO oxidation reaction.

Embodiments of the present application provide a martensitic steel and a preparation method therefor, a structural member, and a terminal device. The martensitic steel provided in the embodiments of the present application comprises the Ni element, the Co element, the Mo element, the Nb element, the C element, the Fe element and other trace elements; on the basis of the total mass of the martensitic steel, the mass fraction of the Ni element is 14%-16%, the mass fraction of the Co element is 16%-18%, the mass fraction of the Mo element is 7%-10%, the mass fraction of the Nb element is 0.1%-0.6%, and the mass fraction of the C element is 0.003%-0.1%. On the basis of the element selection of the martensitic steel and the design of the content of each element, the martensitic steel can be prepared by means of a powder molding process such as metal injection molding, and the martensitic steel prepared by means of the described process can have high strength, good toughness, and a preset shape.

This invention relates to the field of battery anode material technology, specifically to Co-Sb composite hard carbon materials, their preparation methods, anode sheets, and applications. The method first combines a Co source and an Sb source to obtain a Co-Sb material. Then, based on the Co-Sb material as a core, organic carbon is deposited and coated, and finally carbonized to obtain the Co-Sb composite hard carbon material. This method is simple and easy to implement. Combining the electrocatalytically active Co element with Sb, and then combining it with carbon materials, is beneficial for the anode material to produce excellent electrochemical performance. As an anode material, this material can improve the problem of limited capacity in anode materials, enhance its reversible capacity, and simultaneously maintain excellent stability and good fast-charge and fast-discharge capabilities during charge-discharge cycles, thereby improving the overall electrical performance of the battery.

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 invention relates to a composite chlorine evolution electrode and a preparation method and application thereof, and the preparation method comprises the following steps: placing a titanium-based material as a carrier in an anode, carrying out electro-deposition in a cobalt-ytterbium mixed salt solution, and calcining to obtain the composite chlorine evolution electrode. According to the composite chlorine evolution electrode provided by the invention, the active material simultaneously contains the Co element and the Yb element, the introduced Yb element can generate a synergistic effect with the Co element, the charge distribution around the Co element is adjusted, the conductivity of the composite chlorine evolution electrode is improved, the adjustment of the charge distribution and the improvement of the conductivity jointly optimize a chlorine evolution reaction mechanism, and the catalytic chlorine evolution activity is enhanced; the preparation method disclosed by the invention is simple, quick, green and efficient, low in raw material cost, low in manufacturing cost and suitable for large-scale production, and shows the potential of industrial large-scale application.