1556 results about "Nickel alloy" patented technology

The invention discloses an explosive welding method for preparing a super-thick large-area composite plate based on a nickel-based alloy plate. A steel plate serves as a base plate, a plurality of supporting blocks are laid, a nickel alloy plate is placed on the supporting blocks, then powdery emulsion explosive is laid, a detonator is placed, and finally the super-thick large-area nickel-based alloy composite plate is prepared after explosive cladding and detection are qualified. According to the explosive welding method for preparing the super-thick and large-area composite board based on the nickel-based alloy board, explosive cladding of the super-thick and large-area nickel-based alloy composite board is achieved, the fitting rate, the shear strength and other performance of the composite board can meet the requirements, and the mechanical performance and the corrosion resistance can meet the requirements of development of the industries such as equipment manufacturing and chemical engineering.

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 laser cladding preparation method for improving the wear resistance of a cladding layer by doping tungsten carbide. According to the method, cladding process parameters are preliminarily obtained based on finite element heat flow analogue simulation, cladding layer preparation is carried out, cladding quality characterization is carried out to obtain the optimal cladding process parameters, and finally the cladding layer with the wear-resistant characteristic is obtained. The method comprises the following steps: firstly, constructing a heat flow coupling three-dimensional model, carrying out grid division, establishing a heat source model, defining thermophysical parameters of tungsten carbide (10-15%) nickel alloy composite powder and a matrix, and determining simulated boundary conditions; setting a multi-factor process parameter combination to carry out numerical simulation calculation, and determining laser processing process parameters of laser power, scanning speed and light spot diameter; preparing a cladding layer on the surface of the nodular cast iron by using tungsten carbide (10-15%) nickel alloy composite powder through a laser cladding method; and carrying out microscopic morphology and microhardness experiments to carry out quality analysis verification on the cladding layer, determining the optimal process parameters of laser power, scanning speed and light spot diameter when the cladding layer has no obvious defect morphology and the hardness is higher than that of the raw material, and obtaining the laser cladding preparation method for improving the wear resistance of the cladding layer by doping tungsten carbide. The invention provides a new research method and a high-quality preparation approach for improving the wear resistance of the cladding layer by tungsten carbide, and can be widely applied to the fields of strengthening and repairing mining machinery, aerospace parts and the like.

The invention relates to a high-frequency and high-performance iron-nickel alloy magnetic powder core and a preparation method and application thereof, belongs to the field of metal magnetic powder cores, and solves the problems that in the prior art, when a metal magnetic powder core is applied at high frequency, high magnetic conductivity, high magnetic conductivity stability and high quality factor are difficult to consider, and the saturation flux density is low. And the preparation process is tedious. The invention discloses a preparation method of a high-frequency high-performance iron-nickel alloy magnetic powder core. The preparation method comprises the following steps: S1, preparing raw materials; s2, performing pretreatment; s3, the pretreated iron-nickel alloy powder and nano SiO2 powder are blended, and inorganic insulation coating powder is obtained; s4, adding the inorganic insulating coating powder into a first coating agent to obtain inorganic and first organic insulating coating powder; s5, adding the inorganic and first organic insulation coating powder into a second coating agent to obtain inorganic and double-layer organic insulation coating powder; and S6, compression molding. The comprehensive magnetic performance of the iron-nickel magnetic powder core is improved, and the preparation process is simplified.

The invention relates to the technical field of hydraulic test of nickel alloy pipes, and discloses a hydraulic test system for a thin-wall nickel alloy pipe. According to the system, in the axial loading state of the thin-wall nickel alloy pipe, a closed water pressure cavity is established through an annular sealing clamp, and then strain distribution data on the surface of the pipe body is collected through a distributed optical fiber sensor array. And constructing a three-dimensional stress field reconstruction model based on the acquired strain distribution data, calculating an equivalent plastic deformation threshold value of the pipe body under different water pressure gradients, adjusting a water pressure loading curve slope parameter according to the equivalent plastic deformation threshold value, and generating a dynamic water pressure loading instruction. And the high-frequency pressure pulse generator executes the instruction, synchronously triggers the X-ray diffractometer to collect lattice distortion data of the tube body, inputs the data into the material microscopic damage evolution model, and outputs a microscopic defect spatial distribution map. And finally, material constitutive parameters of the three-dimensional stress field reconstruction model are corrected based on the atlas, closed-loop feedback control is formed, and multi-dimensional data acquisition and accurate management and control of the thin-wall nickel alloy pipe hydrostatic test are achieved.

The invention belongs to the field of electrical electronics and advanced non-ferrous metal additive manufacturing, and particularly relates to a preparation method of a laser additive manufacturing copper alloy-tungsten copper composite electrical contact, which comprises the following steps of: preparing a nickel or nickel alloy coating on a copper alloy base material by adopting coaxial powder feeding laser cladding to serve as a middle layer, and then preparing a tungsten copper coating by laser cladding to obtain the copper alloy-tungsten copper composite electrical contact. The composite electrical contact is composed of a pure copper or copper alloy base material layer, a pure nickel or nickel alloy coating and a tungsten copper coating in sequence. The electrical contact obtained by the invention has relatively high electrical conductivity and thermal conductivity, and also has good arc ablation resistance; the copper alloy-tungsten copper electrical contact is prepared by adopting the laser cladding technology, so that the production cost can be effectively reduced, the production efficiency is improved, meanwhile, later maintenance and repair are facilitated, and the method is green and environment-friendly.

The invention provides a high-temperature alloy for manufacturing a nickel-copper alloy hot extrusion die, which is characterized by comprising the following components in percentage by weight: 0.02 to 0.08 percent of C, less than or equal to 0.15 percent of Si, less than or equal to 0.15 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.01 percent of S, 14.0 to 17.0 percent of Cr, 7.5 to 9.5 percent of Mo, 2.2 to 2.6 percent of Nb, 1.0 to 1.6 percent of Al, 2.2 to 2.8 percent of Ti, 0.005 to 0.015 percent of B, 0.01 to 0.05 percent of Zr, 21.0 to 24.0 percent of Fe and the balance of Ni. The preparation method of the alloy comprises the following processes: firstly, alloy raw materials are subjected to vacuum induction melting and then cast into ingots, then electroslag ingots are obtained through electroslag remelting, then the electroslag ingots are subjected to multi-heating-number forging, and then heat treatment is carried out. The highest use temperature of the alloy reaches 1000 DEG C, and the oxidation rate at 1000 DEG C is as low as 0.08 g / m < 2 >. H; at the temperature of 650 DEG C, the tensile strength reaches 1000 MPa, the yield strength reaches 850 MPa, the fatigue strength is higher than 400 MPa, and the lasting time of the load of 700 MPa reaches 80 h; the service life of a nickel-copper alloy hot extrusion die made of the alloy can reach 25000 times.

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 special composite enamel coating for a chromium-nickel alloy base material and a preparation method of the special composite enamel coating, when the special composite enamel coating structurally comprises one layer, the special composite enamel coating comprises the following components in parts by mass: 40-65 parts of a basic glass phase, 30-55 parts of a high-melting-point ceramic reinforced phase, 2-10 parts of a thermal expansion coefficient regulator and 0.5-5 parts of an interface bonding accelerant. Compared with the prior art, the enamel coating can achieve nearly perfect thermal expansion coefficient matching with a chromium-nickel alloy matrix, a tough chemical bonding interface is formed, the enamel coating can stably work for a long time in the extreme high-temperature environment of 1,100 DEG C or above, and meanwhile the enamel coating has the excellent abrasion resistance, repeated rapid cooling and rapid heating cycle resistance and thermal shock resistance.

The invention belongs to the field of OER catalysis, and particularly discloses a preparation method of a perovskite-based composite catalyst for surface in-situ desolvation of cobalt-iron-nickel ternary alloy nanoparticles, a perovskite precursor material with the expression formula of A-site defects being A1-xBO3-delta is obtained, and then the perovskite precursor material is roasted in a hydrogen-containing atmosphere at the temperature of 340-410 DEG C to obtain the perovskite-based composite catalyst for surface in-situ desolvation of cobalt-iron-nickel ternary alloy nanoparticles, in the A1-xBO3-delta, A is alkaline earth or a rare earth metal element, B comprises Co, Fe and Ni, and x is more than or equal to 0.85 and less than 1. The invention also comprises the catalyst prepared by the preparation method and the OER catalytic application of the catalyst. The preparation method provided by the invention can be used for preparing materials with special physicochemical and structure and excellent OER catalytic activity.

The invention discloses a cathode roller with a honeycomb surface structure. A precise honeycomb micro-pattern structure is arranged on the surface of the cathode roller. The invention also discloses a method for manufacturing alloy foil by using the cathode roller, which comprises the following steps: dissolving ferric salt in ultrapure water to obtain a ferric salt solution; dissolving nickel salt in ultrapure water to obtain a nickel salt solution; mixing the two solutions and filtering; preparing various additive solutions, mixing all the additive solutions with the obtained iron-nickel solution to obtain an electrolyte, filtering the electrolyte, and transferring the filtered electrolyte into an electrolytic cell of a crude foil engine; and applying current to a cathode roller and an anode plate which are separately arranged in the electrolytic bath, electrically depositing iron and nickel on the surface of the cathode roller, and rolling through a roll-to-roll process to obtain the iron-nickel alloy foil. The alloy foil manufactured by the method has the characteristics of low surface roughness, high tensile strength and high ductility.

The invention belongs to the technical field of austenitic heat-resistant steel, and provides ternary trace element co-doped corrosion-resistant heat-resistant steel and a preparation method thereof.The preparation method comprises the steps that pure iron, ferrosilicon alloy, ferrochrome alloy, ferro-nickel alloy, ferro-molybdenum alloy, ferrotungsten alloy and cobalt powder serve as raw materials; and sequentially carrying out molten steel smelting, refining purification, casting molding, quenching and tempering heat treatment and nitriding treatment to obtain the ternary trace element co-doped corrosion-resistant heat-resistant steel. The austenitic heat-resistant steel with excellent mechanical property and corrosion resistance is prepared by doping the molybdenum element, the cobalt element and the tungsten element into the steel matrix and combining different carburizing treatment processes.

The invention relates to a method for manufacturing a bipolar plate (2), comprising the following steps: - Provision of two steel half-sheets (3, 4), wherein at least one of the two half-sheets (3, 4) has an embossed structure (5), - Construction of a three-dimensional metal structure (7) from at least one powder (12) of a metal different from the steel of the half-sheets (3, 4), wherein the metal is selected from the group comprising titanium, titanium alloys, nickel, nickel alloys, chromium, chromium alloys, ferrochrome alloys, copper, copper alloys, silver, silver alloys, or gold, platinum, iridium, rhodium, ruthenium and their alloys, on a first half-sheet (3) of the two half-sheets (3, 4) by means of a laser (10) with green laser light and consequently a wavelength in the range of 495 nm to 550 nm, and - Forming a material-bonded connection of the 3D metal structure (7) with a second half-sheet (4) of the two half-sheets (3, 4) using the same laser (10), wherein the half-sheets (3, 4) are joined to form a bipolar plate (2). The invention further relates to a bipolar plate (2) for an electrochemical cell (20).

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 relates to the technical field of iron-nickel alloy foil preparation, and discloses a low-curl iron-nickel alloy foil suitable for an all-solid-state battery and a preparation method of the low-curl iron-nickel alloy foil. The electrolyte solution is added into an electrolytic cell, and current is applied to the electrolyte solution; the method comprises the following steps: depositing an iron-nickel alloy on the surface of a cathode roller, stripping to obtain an iron-nickel alloy foil, carrying out electrophoresis on the iron-nickel alloy foil by using a magnesium oxide electrophoresis solution in an electrophoresis cell to form a magnesium oxide coating on the iron-nickel alloy foil, cleaning with an acid solution, and carrying out electrochemical fluorination treatment on the iron-nickel alloy foil to obtain the magnesium oxide coating on the iron-nickel alloy foil. Forming a fluorinated layer on the magnesium oxide coating; and the iron-nickel alloy foil is subjected to heat treatment at the temperature not exceeding 600 DEG C in a heat treatment chamber, and the iron-nickel alloy foil is obtained after cooling. The high-quality iron-nickel invar iron-nickel alloy foil can solve the curling problem and is suitable for all-solid-state batteries.

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.

A firearm suppressor is provided, including a tubular core, a baffle carried within the core, and a tubular mount. The core may be attached end-to-end to the mount. A cap may be attached end-to-end to the core opposite the mount. An intermediate member may be included, extending between the mount and the cap, and residing outboard of the core. The intermediate member may be welded to the mount and to the cap. The mount, the cap, and the intermediate member may be composed of one or more of titanium, aluminum, resins, polymers, composites, carbon fiber, and ceramics, whereas the core and the baffle may be composed of one or more of cobalt, nickel alloy, steel, stainless steel, and cobalt alloy.

The invention relates to the field of electrochemical polishing of cobalt-based alloys, in particular to an environment-friendly electrochemical polishing solution of a cobalt-chromium-tungsten-nickel alloy and a polishing method of the environment-friendly electrochemical polishing solution. The cobalt-based alloy comprises the following chemical elements in percentage by mass: 15.0-25.0% of Cr; w: 10.0% to 20.0%; 0.0% to 15.0% of Ni; the balance is Co and unavoidable impurity elements such as O, N and H. The environment-friendly polishing solution comprises the following chemical components by mole percent: 0.5-2 mol / L of ChCl; 0.7 to 1.0 L of ethylene glycol; 0 to 0.3 L of ethanol; 0.1 to 0.3 L of glacial acetic acid; and a small amount of citric acid. According to the electrolytic polishing, alloy serves as an anode, a U-shaped titanium plate serves as a cathode, the voltage is 40-60 V, the current density is 0.5-2 A / cm < 2 >, and the polishing temperature is normal temperature. The method has the advantages that the environment-friendly electrolyte is adopted, the surface of the cobalt-chromium-tungsten-nickel alloy can be polished, pollution caused by electrolyte of a traditional chromium oxide system and an acid system is avoided, the follow-up repeated cleaning procedure is reduced, and material precision control is improved.

The invention discloses a preparation method of an ultra-large-diameter copper-nickel alloy seamless tube, which comprises the following steps of: obtaining a cold-rolled raw material which is uniform in internal structure and free from pores by using forging and cross piercing methods, and then performing cold rolling to eliminate an as-cast state, performing hot working on the structure to fully refine crystal grains and drawing the raw material which meets the equipment requirements in diameter and wall thickness; the large-diameter seamless pipe with the diameter of 508 mm is prepared, and the produced large-diameter seamless pipe is excellent in mechanical performance, uniform in grain size and internal structure and high in practicability and economic benefits.

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 preparation method of a zinc-nickel alloy coating. A formula of a plating solution comprises zinc chloride, nickel sulfate hexahydrate, sodium hydroxide, sodium potassium tartrate tetrahydrate, trisodium citrate, potassium citrate, triethanolamine, tetraethylenepentamine, a primary brightener and a secondary brightener. A double-acid compound complexing agent is used for replacing a traditional single-acid complexing agent, and a plating layer can have a finer crystal structure by compounding a basic plating solution to electroplate a zinc-nickel alloy, so that the plating layer with more excellent corrosion resistance is obtained; the stability of metal ions in an electroplating solution is improved, the conductivity and uniformity of the electroplating solution are improved, the quality of a plating layer can be remarkably improved, the corrosion resistance and hardness of the plating layer are improved, pores in the plating layer are reduced, and the protection capability on a matrix is enhanced.

The invention discloses conductive paste, a crystalline silicon solar cell and a preparation method of the crystalline silicon solar cell, and belongs to the technical field of photovoltaic cells. The conductive paste comprises glass powder which accounts for 1.5 wt%-6 wt% of total solids in the conductive paste; an organic carrier accounting for 9 wt% to 15 wt% of total solids in the conductive paste; a first conductive metal, which accounts for 70 wt% to 88 wt% of total solids in the conductive paste; a second conductive metal which accounts for 1 wt% to 10 wt% of the total solid content in the conductive paste; wherein the specific surface area of the second conductive metal is larger than 0.5 m < 2 > / g and smaller than 1.8 m < 2 > / g, and the second conductive metal is selected from nickel or nickel alloy. The nickel or the nickel alloy with the specific surface area is adopted to replace part of silver, the influence on the density of a sintered silver structure and the conductivity of a silver / nickel electrode can be reduced, the photoelectric conversion efficiency of the solar cell can be maintained by adding the nickel powder, and the preparation cost of the solar cell can be reduced by reducing the use amount of the silver.

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 belongs to the field of metal material processing, and particularly relates to a high-strength high-temperature nickel alloy welding material and a preparation method thereof.The high-strength high-temperature nickel alloy welding material comprises, by weight, 0.02%-0.05% of C, 0.10%-0.20% of Si, 18.0%-22.0% of Cr, 7.0%-9.0% of Fe, 4.0%-6.0% of Co, 2.0%-4.0% of W, 3.0%-6.0% of Mo, 0.005%-0.010% of B, 0.5%-2.5% of the total amount of Al and Ti, 0.05%-0.08% of Zr, 2.0%-2.5% of Nb, 0.30%-0.40% of RE, smaller than 0.005% of S, smaller than 0.005% of P, 1.5%-4.0% of modified boron nitride mixed powder and the balance Ni, the high-strength and high-temperature nickel alloy welding material is obtained through hot working, heat treatment, surface treatment and coating preparation, and the problem that in the prior art, deposited metal formed after welding of the high-strength and high-temperature nickel alloy welding material is poor in high-temperature mechanical property in a high-temperature environment can be effectively solved.

The invention discloses an iron-nickel metal magnetic powder core with high stable magnetic conductivity and low loss and a preparation method of the iron-nickel metal magnetic powder core. The iron-nickel metal magnetic powder core is prepared through the steps of preparing iron-nickel alloy powder through gas atomization, screening the particle size, carrying out insulation coating, carrying out compression molding, carrying out heat treatment and carrying out impregnation and spraying. Wherein in the insulating coating process, a passivation solution is adopted to form an insulating layer on the surface of the iron-nickel alloy powder, and the passivation solution comprises 0.1 wt%-0.3 wt% of phosphoric acid, 0.1 wt%-0.6 wt% of sol and the balance deionized water according to the weight part of the iron-nickel alloy powder; and the pH value of the passivation solution is 4-7. According to the technical scheme, the iron-nickel alloy powder is subjected to insulation coating through cooperation of the phosphoric acid, the sol and the coating agent, the magnetic hysteresis loss is effectively reduced, the magnetic conductivity of the iron-nickel magnetic powder core is improved, the quality factor of the iron-nickel magnetic powder core is remarkably improved to 95 or above, and after the obtained high-magnetic-conductivity low-loss iron-nickel magnetic powder core is subjected to long-term high-temperature aging, the magnetic conductivity change rate does not exceed 2%; and the safety and the performance stability are greatly improved in the application of power electronic devices.

The invention belongs to the technical field of catalytic chemistry, and particularly relates to a method for enhancing photoelectric composite catalytic reaction efficiency through self-adaptive multi-field coupling. Specifically, firstly, a closed columnar reactor composed of an LED array, a reflection / lens system, a copper-nickel alloy cathode, a Ru-doped PbO2 anode, a Ti5O7 / Ti3O4 composite photocatalytic parallel-connection multi-tube plate and the like is built, a distributed silicon photodiode and a quantum dot fluorescent probe sensor are installed, a machine learning algorithm is utilized, and according to the reactant concentration and the by-product generation condition, the quantum dot fluorescent probe sensor and the quantum dot fluorescent probe sensor are analyzed. Light field conditions (wavelength, intensity and distribution) used by photocatalysis, electric field conditions (current, voltage and power line distribution) used by electrocatalysis and flow field conditions (flow velocity, flow rate and distribution) are dynamically adjusted to optimize the chemical reaction rate, and an AI model is combined to predict an optimal multi-field coupling setting scheme, so that the efficiency is improved, the energy consumption is reduced, and the cost is reduced. Meanwhile, the effect of enhancing the catalytic conversion reaction is achieved.

The halogen-free precoating soft soldering flux for the nickel plating layer comprises the following components in percentage by weight: 10%-50% of modified rosin, 1.0%-10% of an active agent, 0.5%-2.0% of a surfactant, 1.0%-3.0% of an antioxidant, 1.0%-3.0% of a corrosion inhibitor, 1.0%-3.0% of an additive and the balance of a solvent, the coating method comprises the steps that scaling powder is prepared according to the original component materials, the water bath temperature is constant, a soldering lug is flatly laid on a polytetrafluoroethylene plastic plate to be preheated for half a minute at the temperature of 90-100 DEG C, a proper scaling powder solution for constant-temperature pre-coating is dropwise added to the soldering lug, heating and drying are conducted after uniform brushing, cooling is conducted to the room temperature after drying, and then the formed soldering lug pre-coated with the scaling powder is obtained. The problems that when an existing scaling powder is used for pre-coating a soldering lug, halogen such as Cl and Br is contained, coating is difficult, and adhesion occurs due to mutual contact and pressing of scaling powder coatings are solved. The soldering flux is halogen-free, has proper activity, does not stick to hands after being coated and dried, and is short in welding time, good in wettability and easy to clean; and nickel and nickel alloy can be well welded.

The invention discloses a zirconium-nickel dissimilar metal welding method based on active regulation and control of a temperature field. The zirconium-nickel dissimilar metal welding method comprises the following steps that S1, base metal is cleaned; the butt-joint end faces and the welding surfaces of the zirconium and nickel alloy pipes are polished and cleaned, and clean zirconium and nickel base materials are obtained; s2, a to-be-welded part is assembled; the to-be-welded end face of the clean base metal is assembled in a protective gas cavity of the rotary clamping device; s3, welding is conducted; a laser scanner is adopted for welding at a preset welding position, heat source gradient distribution of base metal at the two ends of a welding seam is controlled by regulating and controlling laser power, welding seam temperature field feedback is established through an infrared temperature sensor, and real-time monitoring and laser power regulating and controlling are conducted; s4, postweld heat treatment; and the laser power is adjusted in real time according to welding seam temperature field feedback so as to adjust and control the welding seam cooling process. According to the method, effective connection of zirconium-nickel indissolvable metal is achieved by controlling the regional welding temperature field, the temperature range for forming brittle compounds is avoided, the uniformity of a molten pool between Zr and Ni materials is ensured, and welding defects such as hot cracks and air holes are reduced.