168 results about "Copper nickel alloy" patented technology

The invention discloses a short-process continuous smelting method for nickel-containing copper concentrate. The method comprises the following steps: 1) smelting nickel-containing copper concentrate to obtain smelting slag and high-nickel copper matte which are layered up and down; (2) the high-nickel copper matte is subjected to suspension blowing, and nickel-copper blowing slag and crude copper which are layered up and down are obtained; and (3) the nickel-copper converting slag is subjected to reduction smelting, and vertically-layered reducing slag and copper-nickel alloy are obtained. By adjusting the reaction kinetics condition and the slag type structure of the blowing section, copper and nickel elements in the high-nickel copper concentrate are efficiently separated in the blowing section, the produced crude copper can meet the requirements of subsequent fire refining and electrolytic refining, a nickel removal link does not need to be added at the rear end, the smelting process is shortened, and the production cost is reduced. And the application of the high-nickel copper concentrate to large-scale continuous copper smelting becomes possible. The nickel-copper converting slag is reduced into the copper-nickel alloy, the link of returning the converting slag to be mixed in a traditional process is omitted, short-process recovery of the Ni element is achieved, the problem of circulating enrichment of the Ni element in a system is solved, and the method is a brand-new technical route for widening the application range of raw materials, reducing cost and improving efficiency in a copper smelting plant.

The invention discloses a graphene composite film with high thermal conductivity and a preparation method and application thereof. The preparation method comprises the following steps: preparing a graphene film on a copper-nickel alloy substrate by adopting a CVD (Chemical Vapor Deposition) method; wherein the graphene film comprises a single-layer graphene structure and a pagoda-shaped multi-layer graphene core structure dispersed on the surface of the single-layer graphene structure; applying the graphene oxide slurry to the surface of the graphene film so as to form a graphene / graphene oxide composite film; and carrying out carbonization, graphitization and calendaring treatment on the graphene / graphene oxide composite film to prepare the graphene composite film with high thermal conductivity. The method not only solves the problems that the graphene film prepared by the traditional CVD method is thin in thickness and cannot be commercially used on a large scale, but also improves the heat-conducting property of the graphene film prepared by the oxidation-reduction method, and fully exerts the intrinsic characteristics of the graphene material, so that the graphene film has higher market competitiveness.

The invention provides a copper-nickel alloy catalytic electrode and a preparation method and application thereof. The copper-nickel alloy catalytic electrode comprises a foamed nickel substrate and a copper-nickel alloy vertically loaded on the surface of the foamed nickel substrate, the molecular formula of the copper-nickel alloy is Cu < 0.81 > Ni < 0.19 >, and the copper-nickel alloy is of a dendritic nanostructure. The preparation method comprises the following steps: adding copper sulfate, nickel sulfate and ammonium sulfate into water, and uniformly stirring to obtain an electrolyte; taking a foamed nickel substrate as a working electrode, taking a saturated silver-silver chloride electrode as a reference electrode, taking a platinum sheet or a graphite rod electrode as a counter electrode, and applying constant current density to the working electrode to obtain a preset electrode; and alternately cleaning the preset electrode by using ethanol and distilled water, and carrying out vacuum drying to obtain the copper-nickel alloy catalytic electrode. According to the prepared copper-nickel alloy catalytic electrode, the copper-nickel alloy is in a dendritic morphology, has abundant active sites and a high specific surface area, and has excellent catalytic activity and stability in hydrogen preparation by coupling hydrogen evolution reaction for synthesizing adipic acid through electro-catalysis of cyclohexanone.

The invention discloses a comprehensive recovery method for copper-nickel concentrate, which comprises the following steps: smelting the copper-nickel concentrate to obtain smelting slag and high-nickel copper matte which are layered up and down; performing side-blowing converting on the air-quenched and granulated high-nickel copper matte to obtain high-nickel converting slag which is layered up and down and qualified crude copper; the liquid smelting slag and the high-nickel converting slag are mixed for two-step reduction smelting, iron slag and copper-nickel alloy which are layered up and down are obtained through weak reduction, and reducing slag and molten iron which are layered up and down are obtained through strong reduction. According to the method disclosed by the invention, one-step removal of the Ni element is realized through side-blowing reinforced stirring of the granulated copper matte, so that application of the high-nickel copper concentrate to large-scale continuous copper smelting becomes possible. And meanwhile, through cooperative treatment of the smelting slag and the converting slag, short-process comprehensive recovery of Cu, Ni and Fe elements is achieved. The deeply depleted tailings are subjected to water quenching to form a calcium-silicon glass body which has a curing effect on heavy metal ions and is a high-quality building raw material, high-valued and full-quality utilization of mineral resources is realized, and the method is a brand-new technical route for widening the application range of raw materials, reducing cost and improving efficiency in a copper smelting plant.

The invention provides a copper-nickel alloy foil and a preparation method and application thereof, and belongs to the technical field of lithium ion battery negative electrode current collectors, and the preparation method comprises the following steps: preparing a copper-nickel composite electrolyte, and adding a coordination agent, a pH buffer agent and an additive into the copper-nickel composite electrolyte to obtain a mixed electrolyte; the coordination agent comprises a main coordination agent and an auxiliary coordination agent, and the main coordination agent comprises at least one of trisodium citrate, potassium sodium tartrate and sodium pyrophosphate; the auxiliary coordination agent comprises at least one of ammonia water, glycine and triethanolamine; and a cathode and an anode are placed in the mixed electrolyte, the pH of the mixed electrolyte is controlled to be 6-10, direct current is applied for electrochemical deposition, and the copper-nickel alloy foil is obtained. According to the method, the alkalescence system is adopted, the main coordination agent and the auxiliary coordination agent are used, full coordination of free Cu < 2 + > and Ni < 2 + > is achieved, precipitation is avoided, the hydrogen evolution phenomenon is greatly reduced, and the alloy foil quality is improved.

The invention discloses a production process of a novel copper-based alloy bimetallic synthesis material, and relates to the field of alloy materials.The production process comprises the steps that a copper-nickel alloy is selected as a base material, a titanium alloy is selected as a functional layer, and stress distribution of a bonding layer is designed and optimized through gradient component distribution; preparing a copper-nickel alloy liquid by utilizing vacuum induction melting, supporting and fixing a core rod through three points, and controlling temperature and flow velocity for pouring to form co-growth crystals; the surface of the base material is cleaned through a sand blasting process, a Cu-Ti nano coating is coated through a PVD technology, and a nanoscale convex-concave structure is formed; building a mathematical model of a temperature field and a component diffusion field, and optimizing and combining area temperature distribution and diffusion behaviors through simulation analysis; through gradient temperature control annealing treatment, residual stress is eliminated, and diffusion is promoted; the bonding performance is evaluated by combining shear strength and microhardness tests; and dividing the production process based on the modular design. The method can be widely applied to the industrial fields with high-temperature, high-strength and corrosion-resistant requirements.

The invention discloses a seawater conductivity sensor electrode material based on a copper-nickel-based nanostructure and a preparation method, the electrode material comprises: a substrate, a copper-nickel-based nanostructure layer being formed on the surface of the substrate; the substrate comprises an insulating compound and a coating coated on the surface of the insulating compound, the insulating compound comprises at least one of high-resistance silicon, silicon oxide, aluminum oxide ceramic and plastic, the coating comprises a metal coating and / or a semiconductor coating, and the copper-nickel-based nanostructure layer is in a dendritic crystal or cluster form. The copper-nickel alloy nanostructure is a core material of the electrode, so that the electrode material has high specific surface area and rich active sites, the measurement accuracy and measurement limit of the electrode material can be improved, the service life can be prolonged, the manufacturing cost can be reduced, and the application requirements of the ocean Internet of Things can be met.

The invention relates to normalized high-strength medium-carbon acid-resistant container steel and a preparation method, and belongs to the technical field of steel manufacturing. The acid-resistant container steel comprises the following chemical components in percentage by mass: less than or equal to 0.20% of C, less than or equal to 0.55% of Si, 1.20-1.70% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, less than or equal to 0.050% of Nb, less than or equal to 0.050% of V, less than or equal to 0.030% of Ti, more than or equal to 0.020% of Al, less than or equal to 0.0060% of Ca and a matrix element Fe. A proper amount of Nb (niobium), V (vanadium) and Ti (titanium) alloy elements are added to replace a traditional Cu (copper) and Ni (nickel) alloy combination, and the alloy component cost is greatly reduced while high strength and acid resistance are guaranteed.

The invention discloses a copper-zinc-nickel catalyst as well as a preparation method and application thereof. A carrier of the copper-zinc-nickel catalyst is a ZnO carrier and is loaded with an active component copper-nickel alloy; the loading capacity of the active component copper and nickel is 35-65% of the total mass of the catalyst; the molar ratio of copper to nickel is (8-16): 1; according to the catalyst, high loading and high dispersion of Cu-Ni effective substances are effectively realized, so that the activity of the catalyst is improved by improving active sites, and the particle size of metal is effectively reduced. The copper-zinc-nickel catalyst provided by the invention is especially suitable for hydrogen production by methanol liquid phase reforming, the hydrogen production rate can reach 30.64 [mu] mol.gcat <-1 >. S <-1 > under the condition of 180 DEG C, the hydrogen selectivity reaches 91.82%, and the CO selectivity is less than 9.12%; relates to the technical field of catalysts.

The invention belongs to the technical field of design and preparation of copper alloy materials, particularly relates to a lightweight cupronickel material and a preparation method thereof, and designs and prepares cupronickel of a new alloy system, namely the lightweight cupronickel material. The density of the light cupronickel material is 6.08 g / cm < 3 >-6.20 g / cm < 3 >, and compared with existing copper-nickel alloy cupronickel, the density is reduced by 31.5%, so that the mass of the cupronickel material with the same volume is reduced by about 1 / 3, and the light weight of the cupronickel material is achieved. The light cupronickel material can be provided for the fields of aviation, spaceflight, weapons and new energy vehicles, the specific gravity of cupronickel parts is effectively reduced, and the light weight of the cupronickel parts is achieved.

The invention relates to a composite three-dimensional copper current collector, a preparation method thereof and a lithium metal battery. The composite three-dimensional copper current collector comprises a three-dimensional copper current collector and self-assembly molecules, the three-dimensional copper current collector comprises a copper foil and a copper-nickel alloy nanocone loaded on the surface of one side of the copper foil; the surface of the copper-nickel alloy nanocone is combined with the self-assembly molecules. Self-assembly molecules are combined on the surface of a three-dimensional copper current collector to modify the three-dimensional copper current collector, and the three-dimensional copper current collector which is thin in thickness, light in weight, excellent in mechanical property, poor in corrosion resistance, weak in oxidation resistance and multiple in side reaction is combined with the self-assembly molecules with different functions. According to the composite three-dimensional copper current collector, the phenomena that the three-dimensional copper current collector is easy to oxidize and not resistant to corrosion, surface side reaction, lithium dendrite growth and the like can be improved, the three-dimensional copper current collector can be modified in different aspects, the composite three-dimensional copper current collector is applied to a lithium metal battery, and the electrochemical performance such as rate and cycling stability of the lithium metal battery can be obviously improved.

The invention provides an alternating-current weak current high-precision detection system and method, and the system comprises a copper-nickel alloy shielding cover which is used for inhibiting space power frequency radiation interference and power system broadband noise, and a magnetic sensitive element which is used for converting the detected magnetic field change into a corresponding initial current signal, the trans-impedance amplifier is used for converting the initial current signal into a voltage signal; the adaptive noise suppression module collects a power frequency fundamental wave reference signal and a harmonic wave reference signal, generates a harmonic wave anti-phase counteracting signal, and performs anti-phase counteracting on real noise of the initial current signal; the analog-to-digital converter is used for converting the voltage signal into a discretized digital signal, and the discretized digital signal comprises a target signal and a random noise signal; and the FPGA coherent demodulation module is used for carrying out cross-correlation operation and narrow-band filtering on the target signal and the random noise signal to separate out a micro-current signal. The technical problems that in the prior art, composite noise covering is limited, the frequency fluctuation adaptability is poor, and microvolt-level signals are difficult to capture are solved.

The invention discloses a method for measuring trace gold, palladium and platinum in carbonylation copper-nickel alloy leachate, which comprises the following steps of: enriching trace precious metal elements in the carbonylation alloy leachate by utilizing the principle that gold, palladium and platinum and tellurium form coprecipitation, leaving a large amount of matrixes such as nickel, copper and the like in the solution, filtering and washing the precipitate so as to separate the precipitate from a large amount of copper-nickel matrixes, and measuring the content of gold, palladium and platinum in the carbonylation copper-nickel alloy leachate. According to the method, the influence of a matrix effect generated by a high-copper-nickel matrix on an analysis result is solved, trace precious metal elements can be enriched from the nickel-copper matrix which is more than about 200g / L, the detection conditions of ICP-AES (Inductively Coupled Plasma-Atomic Emission Spectrometry) are met, the accurate analysis of Au, Pd and Pt in the carbonylation alloy leachate is realized, the requirements of production on the accuracy and stability of the analysis result are met, and the method is suitable for industrial production. Therefore, operation parameters can be adjusted in time, and loss of precious metal elements is avoided.

The invention discloses a gradient copper-nickel alloy and a preparation method thereof, and belongs to the technical field of alloy preparation. CuCrZr is laid on the substrate, laser printing is carried out, and a CuCrZr alloy layer is formed on the surface of the substrate; gradient powder feeding printing is carried out on the CuCrZr alloy layer, and circulation is carried out for multiple times; the conveyed powder comprises CuCrZr and GH4169, the content of the CuCrZr is reduced along with the number of times of gradient powder feeding printing, and during last gradient powder feeding printing, only GH4169 is conveyed, printing is conducted, and the gradient copper-nickel alloy is obtained. Through the composition gradient design from CuCrZr to GH4169 and the multi-cycle printing process, collaborative improvement of high strength and high plasticity is achieved, and the product of high strength and ductility is obtained. According to the method, a single component can realize structure-function integration from high thermal conductivity and electrical conductivity to excellent high-temperature strength and corrosion resistance, and the application potential of a material system in different fields is greatly expanded.

The multi-measuring-point armored alloy thermocouple comprises a thermode, a metal armored layer arranged outside the thermode in a sleeving mode and an insulating material filled between the thermode and the metal armored layer, a plurality of metal wires of the thermode are made of copper-nickel alloy materials and are arranged in order, one ends of the metal wires are welded to form a measuring end, and the other ends of the metal wires are welded to form a welding end. The metal armor layer adopts a layered structure design and is composed of an innermost layer, a middle layer and an outermost layer; the metal armoring layer adopts a spiral winding armoring structure design, and an armoring material is wound around the thermocouple wire in a spiral mode. According to the invention, research is carried out from the aspects of structure, process method, dynamic characteristics, numerical simulation, alloy material components and the like, and analysis and inspection are carried out in combination with the means of theoretical analysis, experimental test and the like, so that the use of precious thermocouple materials is effectively reduced; and finally, the comprehensive performances such as the bending quality, the dynamic response time, the measurement precision, the stability and the manufacturing cost of the armored cable are improved.

The invention discloses an aluminum-copper composite strip and a preparation method thereof, the strip comprises a copper alloy layer, an aluminum material layer and an intermetallic compound layer, the aluminum material layer is embedded in the copper alloy layer, the intermetallic compound layer is located between the copper alloy layer and the aluminum material layer, the copper alloy layer is a precipitation strengthening type copper-nickel alloy, and the intermetallic compound layer is an aluminum alloy layer. The average particle size of second-phase particles in the copper alloy layer is smaller than or equal to 20 nm, the intermetallic compound layer is composed of a first diffusion layer and a second diffusion layer which are stacked, the first diffusion layer contains a Cu9Al4 intermetallic compound, the second diffusion layer contains a CuAl2 intermetallic compound, and the thickness of the second diffusion layer is smaller than or equal to 2 microns. The preparation method of the strip comprises the technological processes of grooving, surface cleaning, composite rolling, intermediate annealing, cold rolling, annealing before forming, splitting and packaging. The strip achieves good matching of strength, conductivity, heat stress relaxation resistance and bending performance, and is suitable for occasions with high requirements for comprehensive performance of materials, such as automobile wire harness connecting terminals and the like.

The invention discloses a copper-nickel alloy nanoparticle catalyst and a preparation method and application thereof in microbial electrosynthesis, and belongs to the technical field of energy conversion and microbial electrosynthesis, the preparation method comprises the following steps: dissolving Cu (NO3) 2 and Ni (NO3) 2 in a mixed solution of water and ethanol, dispensing the mixed solution on a carbon-based material, drying the surface by baking and drying overnight, and obtaining the copper-nickel alloy nanoparticle catalyst. A copper-nickel loaded carbon-based material is obtained; calcining the copper-nickel loaded carbon-based material in air at 350-450 DEG C to obtain a copper-nickel oxide loaded carbon-based material; and reducing the carbon-based material loaded with the copper-nickel oxide in flowing H2 at 500-600 DEG C to obtain the copper-nickel alloy nanoparticle catalyst. According to the method, the volatile fatty acid can be synthesized by taking CO2 as a raw material, and the product yield and the Faraday efficiency are relatively high. The method is simple to operate, mild in condition and low in cost, and has relatively high environmental benefits.

The invention provides a long-gap atmospheric pressure glow discharge low-temperature plasma source device which comprises a plasma source, the plasma source is composed of a plasma source frame module, an air pre-ionization microelectrode, a seed electron multiplication module and a plasma source output end packaging module, the air pre-ionization microelectrode is arranged in a ceramic frame, and the seed electron multiplication module is arranged in the ceramic frame. The seed electron multiplication module is composed of an axial annular columnar magnet, a cylindrical gold-plated small-round-hole ceramic plate and a cylindrical gold-plated middle-round hole, and the seed multiplication module and the plasma source frame module are connected and fixed through epoxy resin glue, wherein the cylindrical gold-plated small-round-hole ceramic plate and the cylindrical gold-plated middle-round hole ceramic plate are wrapped by a resin insulating layer. The plasma source output end packaging module is a porous array emitter made of copper-nickel alloy. The problems that a traditional plasma generator is high in power consumption and serious in heating, and a traditional plasma source / electrode is prone to oxidation corrosion, poor in stability, short in discharge gap and the like are solved.

The invention relates to a high-pressure air separation liquid valve with a multi-stage low-temperature self-tightening sealing structure, which relates to the technical field of low-temperature high-pressure fluid control and comprises a valve body assembly, a multi-stage sealing assembly and a valve rod thermal compensation assembly. The multi-stage sealing assembly is arranged on the valve element in a stepped mode and comprises a primary metal hard sealing ring, a secondary modified PTFE sealing ring and a three-stage self-tightening type metal spring energy storage ring, and the main sealing function, the flexible compensation function and the pressure self-tightening function are achieved respectively. The valve rod thermal compensation assembly comprises a titanium alloy valve rod and a copper-nickel alloy thermal buffer sleeve, and the displacement of the sealing face is automatically compensated at the low temperature through the difference between a reserved gap and the thermal expansion coefficient of a material. Through multi-stage sealing cooperation and intelligent thermal compensation, the problem of sealing leakage caused by material failure and thermal deformation under the ultralow-temperature and high-pressure working conditions is effectively solved, all-working-condition reliable sealing is achieved, the safety of the valve in the extreme environment is remarkably improved, and the service life of the valve in the extreme environment is remarkably prolonged.

The invention provides a copper-nickel alloy heat transfer pipe natural seawater natural film forming test device, which comprises a water pump, a seawater pipeline, at least one flusher module and a control system, seawater enters the flusher module through the water pump and the seawater pipeline, each flusher module comprises a water inlet water mixer, a water return water mixer and a heat transfer pipe, the inlet water mixer is provided with a plurality of water inlet end connectors, the return water mixer is correspondingly provided with a plurality of water outlet end connectors, one end of each heat transfer pipe is communicated with the corresponding water inlet end connector, the other end of each heat transfer pipe is communicated with the corresponding water outlet end connector, and the interiors of the inlet water mixer and the return water mixer are of labyrinth structures. The flow velocity of seawater entering different heat transfer pipes is kept consistent. By adopting the natural film-forming test device, a natural seawater natural film-forming test can be carried out on a plurality of heat transfer pipes at the same time, and by combining the positions of the water inlet end interface and the water outlet end interface and through a labyrinth structure in the water inlet and return water mixer, the same flow velocity of seawater in the heat transfer pipes with different specifications is realized, so that the natural film-forming test requirement is met; and a technical support is provided for corrosion protection of the copper-nickel alloy heat transfer pipe of ship sea communication heat exchange equipment.

The invention provides a manufacturing method of a copper-nickel alloy pipe with excellent high-temperature plasticity. The manufacturing method comprises the following steps that S1, Ni, Fe, Mn, Ti, CuMg20 and Cu raw materials are weighed according to components of a nickel-based alloy pipe; s2, raw materials of Cu, Ni, Fe, Mn and Ti are smelted, CuMg20 is added for deoxidation, and an alloy round ingot is obtained through casting; s3, the alloy round ingot is subjected to homogenizing annealing; s4, forging and upsetting the alloy round ingot to obtain an upset round ingot; s5, performing hot extrusion on the upset round ingot to obtain a tubular billet; s6, the tubular billet is subjected to cold rolling, and annealing is conducted between pass cold rolling; and S7, the tubular billet is subjected to heat treatment, and the copper-nickel alloy pipe is obtained. According to the method, the uniformity and thermoplasticity of the alloy structure are improved, the plasticity and comprehensive mechanical performance of the copper-nickel alloy pipe in the high-temperature environment are remarkably improved, and the method is stable, high in repeatability and beneficial to large-scale production of the high-quality copper-nickel alloy pipe.

The utility model relates to the technical field of charging vibrating needles, in particular to a charging vibrating needle capable of passing heavy current, which comprises a needle tail, one end of the needle tail is provided with a needle waist, the needle waist and the needle tail are of an integrated structure, the other end of the needle waist is provided with a boss, the boss and the needle waist are of an integrated structure, and the other end of the boss is provided with a connecting seat. The connecting base and the boss are of an integrated structure, a connecting cylinder is arranged at the other end of the connecting base, the end of one end of the connecting cylinder and the inner wall of the connecting base are installed in an inserted mode, a connecting block is tightly attached to the inner wall of the connecting cylinder in a sliding mode, and the other end of the connecting block penetrates through the connecting cylinder. The whole structure is made of a copper-nickel alloy material and has a good conductive transmission effect, the pinhead can stretch and retract in the connecting cylinder through the connecting block, when the pinhead is in butt joint with a contact piece in a socket pin groove, a buffering effect is achieved through compression of the spring, meanwhile, after butt joint is completed, a tight abutting effect is achieved through the reset effect of the spring, and the contact piece is prevented from being damaged. And the stability of conductive transmission is ensured.

The invention discloses a method for preparing a copper-nickel alloy for a solid-state battery through an alkaline system, and belongs to the technical field of solid-state batteries. A pyrophosphate aqueous solution system is used as an electrolyte, and the copper-nickel alloy is prepared through an electro-deposition method; the pyrophosphate aqueous solution system comprises the following components: raw materials of copper pyrophosphate and nickel chloride, a main complexing agent of potassium pyrophosphate, an auxiliary complexing agent of ethylenediaminetetraacetic acid or potassium sodium tartrate, a brightener and an additive. The components and thickness of the alloy are adjusted by changing the metal ion concentration, the input amount of the complexing agent and the like and changing the technological parameters (pH, current density, electrodeposition time and the like), the copper-nickel alloy with the tensile strength reaching 1012.70 MPa, the elongation reaching 5.27% and the nickel content being 8.93% can be prepared, the corrosion resistance is excellent, the coating thickness is uniform, electrodeposition can be conducted at the normal temperature, and the copper-nickel alloy can be used for preparing the copper-nickel alloy with the tensile strength reaching 1012.70 MPa, the elongation reaching 5.27% and the nickel content reaching 8.93%. Therefore, the method is suitable for large-scale industrial production.

The utility model discloses a rotating shaft oil seal positioning device, which relates to the technical field of oil seals and comprises an oil seal body, a self-tightening spring is arranged in the oil seal body, and a plurality of supporting positioning mechanisms are arranged on one side of the self-tightening spring. The supporting and positioning mechanism comprises a spring part, a connecting plate and a supporting frame, a mounting cavity is formed in the oil seal body, one end of the spring part is fixedly mounted on the inner wall of the mounting cavity, and the other end of the spring part is fixedly mounted at one end of the connecting plate; according to the technical scheme, the supporting and positioning mechanism is adopted, when the rotating shaft rotates and rubs with the oil seal body, the temperature in the oil seal body and the temperature in the installation cavity in the oil seal body rise, the spring piece is made of copper-nickel alloy, the spring piece can deform when the temperature rises, and therefore the oil seal body is prevented from being damaged. Therefore, the connecting plate can be pushed to move towards one side, the supporting frame at one end of the connecting plate can support the self-tightening spring, deviation of the self-tightening spring is avoided, the using effect of the oil seal is better, and the service life of the oil seal is longer.

The invention relates to the field of metal material corrosion and protection, and provides a seawater film-forming device and method for a marine copper-nickel alloy heat exchange tube, and the seawater film-forming method comprises the following steps: S1, preparing the seawater film-forming device; s2, calculating the total flow Q of the pipeline system: Q = n * A * v * 3600 / 1000000; s3, determining the flow of the sea water pump, wherein the flow of the sea water pump is equal to 1.2-1.3 Q; s4, building a seawater film forming device; s5, setting the flow velocity of a pipeline, namely debugging the water by using a starter to ensure that the flow velocity in the heat exchange pipe reaches 1.0-3.0 m / s; and S6, seawater film forming time: forming a film after the heat exchange tube is continuously scoured by seawater for 20-60 days. According to the seawater film forming method for the marine copper-nickel alloy heat exchange tube, the seawater film forming method is easy to operate and convenient to implement; the film forming effect is good; no chemical agent is used, so that the method is environment-friendly.

The invention relates to a preparation method and application of a copper-nickel double-atom modified MXene-based electrocatalyst. According to the method, CuNiDA / MXene is obtained through acid leaching of CuNi / MXene with hydrochloric acid, copper-nickel diatoms with low metal loading capacity are obtained, and residual copper-nickel alloy nanoparticles in the molten salt etching process are successfully converted into the copper-nickel diatoms to be loaded on an MXene substrate in situ; the obtained copper-nickel diatom modified MXene-based electrocatalyst has copper-nickel diatoms coordinated by oxygen functional groups, so that the adsorption of reaction intermediates is enhanced, and the electrocatalytic performance is further improved. The prepared electrocatalyst shows the ammonia yield as high as 59225 [mu] g h <-1 > mg CuNi atom <-1 > and the Faraday efficiency as high as 94.8% in a reaction system for reducing nitrite into ammonia, and has the industrial prospect of green and sustainable synthesis of ammonia.

The utility model discloses a kind of anti-thermal expansion gallium nitride chip packaging transition layer frame, its technical solution main point is, belong to chip packaging field, including transition layer frame body, the internal cavity of the transition layer frame body is provided with thermal expansion buffer structure, the inner end of the transition layer frame body is movably connected with chip body, the lower of the chip body is movably provided with heat conduction sheet, the heat conduction sheet is located in the inner end of transition layer frame body;By setting thermal expansion buffer structure is made of corrugated copper-nickel alloy metal honeycomb body, form honeycomb buffer layer, the special structure of thermal expansion buffer structure can absorb thermal deformation amount, and a pair of limit block can form limit structure in the outer end of chip body, avoid chip body in work with temperature rise and occur slight thermal expansion, and the possible slip, warping or shear stress accumulation that occur in packaging inside is generated, improve the anti-thermal expansion effect of this chip packaging transition layer frame.

The utility model relates to the technical field of solar cells, in particular to a copper electroplating heterojunction cell and physical vapor deposition equipment, and the copper electroplating heterojunction cell comprises a yellow diaphragm, a copper-nickel alloy layer and a grid line; the yellow diaphragm comprises a copper seed layer; the copper-nickel alloy layer is deposited on the surface of the copper seed layer; the grid line is deposited on the copper-nickel alloy layer; the physical vapor deposition equipment is used for preparing a copper-nickel alloy layer of the copper electroplating heterojunction cell; the physical vapor deposition equipment is provided with a deposition chamber, and a copper-nickel alloy target material is arranged in the deposition chamber. The physical vapor deposition equipment can be used for preparing a copper electroplating heterojunction battery, and when the copper electroplating heterojunction battery forms a grid line, the loss of redundant electroplating materials can be reduced, and the cost can be reduced.

The invention discloses a design method for improving corrosion resistance of a copper-nickel alloy by adding alloy elements. The design method comprises the following steps: screening the alloy elements; the first screening condition is that the solid solubility of the to-be-added alloy element in the copper-nickel alloy is larger than 0.1 wt.%, the second screening condition is that the standard electrode potential of the to-be-added alloy element is smaller than that of Ni, the third screening condition is that the deposition line of the to-be-added alloy element is lower than that of Cu2O, and the fourth screening condition is that the to-be-added alloy element is non-noble metal; based on the screening result, the mass percentage content range of the alloy elements is determined according to the maximum solid solubility of the alloy elements in the copper-nickel alloy; the ratio of the nucleation rate to the growth rate is larger than 104, and the corrosion rate is stabilized to be not higher than 0.02 [mu] m / a along with time, and the mass content of the alloy elements is obtained through optimization; and the final components and content of the added alloy element copper-nickel alloy are determined on the basis of the optimization result, and the corrosion resistance of the alloy element copper-nickel alloy is verified through experiments. The invention provides a design thought for the corrosion-resistant alloy with slowly dissolved main elements.

The application relates to the technical field of automobile heating elements, in particular to a cable for heating, which comprises a conductor, an insulating layer and an outer covering, the insulating layer is sleeved on the conductor, and the outer covering is sleeved on the insulating layer; the conductor is a copper-nickel alloy, the resistance value of the copper-nickel alloy is 1.5 ohms / m, and the insulating layer is polyimide paint; the copper-nickel alloy conductor with the resistance value of 1.5 ohms / m is adopted, compared with the tin-copper alloy conductor with the resistance value of 1 ohm / m in the prior art, the heating efficiency is improved under the same current condition, the problem that the automobile cushion heating cable is slow to heat up in a low-temperature environment is effectively solved, the heating demand of a user for a seat can be quickly met, and the comfort experience is improved; meanwhile, the conductor is composed of multiple copper-nickel alloy wires and is plated with nickel on the surface, the structural stability and the conductivity of the conductor are enhanced, the polyimide paint insulating layer is tightly wrapped, the heating is ensured to be uniform and stable, local overheating is avoided, and the heating performance is further optimized.