39 results about "Nickel based" patented technology

The invention discloses a manufacturing process of an NO7718 nickel base alloy nut for nuclear equipment. The manufacturing process comprises the steps of material preparation, hot forging, shot blasting, solid solution heat treatment, physical and chemical detection, finish machining, precipitation hardening heat treatment and detection packaging. The hot forging near-net forming technology is adopted, the shape of the nut blank is directly obtained through plastic deformation, the cutting allowance of machining is greatly reduced, a large number of raw materials are prevented from becoming sweeps, the material utilization rate is remarkably increased, and the raw material cost is effectively reduced; by accurately controlling the initial forging temperature, the final forging temperature and the cooling speed of hot forging as well as subsequent solution treatment and precipitation hardening treatment, grains can be refined, and the precipitation form and distribution of a strengthening phase can be controlled, so that the microstructure of the material is optimized, and the material obtains more excellent comprehensive mechanical properties such as higher strength, plasticity and toughness cooperation; and the harsh working condition requirements of nuclear equipment can be better met. The process provided by the invention ensures the stability and consistency of product performance.

The utility model relates to the technical field of alloy plate longitudinal cutting devices, in particular to a nickel base alloy plate longitudinal cutting device. Comprising a supporting platform, an adjusting sliding rail, an adjusting motor, an adjusting lead screw, an adjusting sliding block, a graduated scale plate, an adjusting support, a hydraulic lifting rod, a lifting toothed plate, an adjusting shaft, an adjusting gear, an adjusting supporting plate, a discharging support, a discharging pulley, a feeding assembly, a limiting assembly, a guiding assembly and a cutting assembly. The alloy plate longitudinal cutting device comprises a supporting platform, a discharging support is arranged on one side of the supporting platform, a plurality of sets of discharging pulleys are arranged on the inner wall of the discharging support, the two ends of each discharging pulley are rotationally connected with the inner wall of the discharging support, and a graduated scale plate is arranged on the upper portion of one side of the supporting platform. Through the synergistic effect of mechanisms such as motor driving, thread adjustment, hydraulic lifting and pulley unloading, accurate longitudinal cutting and rapid unloading of the nickel-based alloy plate are achieved, and the machining efficiency and operation convenience are greatly improved.

A hydrogen evolution electrode preparation method based on a three-period minimal curved surface structure belongs to the technical field of new energy electrolytic hydrogen production and fluid transportation, and comprises the following steps: constructing a three-dimensional model of the required three-period minimal curved surface structure; performing image slicing processing on the three-dimensional model by using slicing software; printing a required three-period minimal curved surface structure by using a plane projection micro-stereolithography 3D printer; a nanometer ultraviolet lamp is adopted to circularly irradiate the three-period extremely-small curved surface structure; soaking in a sulfuric acid solution and carrying out ultrasonic oscillation; carrying out vacuum drying and carrying out oxygen plasma hydrophilic treatment; depositing a nickel-based compact conductive layer on the three-period minimal curved surface structure by using chemical deposition; depositing a nickel-iron alloy catalyst on the three-period minimal curved surface structure of the nickel substrate by using electro-deposition; and carrying out ultrasonic oscillation with ethanol and vacuum drying. According to the application, collaborative design of catalyst distribution and a macro-microstructure is realized, and a new way is provided for preparation of a high-performance water electrolysis hydrogen production electrode.

This invention discloses a method for designing the composition of nickel-containing high-strength material systems based on transfer learning and the barrel theory optimization. The method includes: first, using a recursive feature elimination algorithm to screen key features across source domain benchmark data and target domain experimental data containing sparse components; second, constructing a deep neural network for pre-training on the source domain dataset, extracting nonlinear feature representations between components and performance through hidden layers; third, freezing the weights of the feature extraction layers of the pre-trained model, and for sparse samples in the target domain, introducing Bayesian ridge regression to construct a residual correction model to achieve cross-domain knowledge transfer; and finally, combining multiple metallurgical constraint criteria to perform an evolutionary search within a limited composition space. This invention solves the problem of effectively modeling sparse data in new material systems. By combining deep feature extraction with Bayesian residual correction, it significantly improves the robustness of high-strength material performance prediction and enables precise optimization of industrial-grade composition formulations.

The utility model relates to nickel base alloy processing technical field, and disclose a kind of nickel base alloy bar heat treatment device, including quenching furnace body and the transmission machine body being set in its right side, further include: the cooling tank being set in the right side of transmission machine body;For driving nickel base alloy bar after quenching cooling mobile structure, it is set in the inside of cooling tank;For preventing nickel base alloy bar to drop the shielding structure and limiting structure, it is set in the surface of mobile structure;The utility model is to provide a kind of nickel base alloy bar heat treatment device, with nickel base alloy bar after quenching moves to the top of moving frame, by the setting of cooling tank and mobile structure, nickel base alloy bar after quenching can be driven to move in the inside of cooling tank, so that nickel base alloy bar after quenching and cooling liquid in the inside of cooling tank are fully contacted, to carry out cooling treatment to nickel base alloy bar after quenching.

The invention relates to a trapping device for large-coil heavy nickel-based alloy wire rod production, and belongs to the technical field of wire rod production, the trapping device comprises a trapping cover and a fixing plate arranged above the trapping cover, the bottom of the trapping cover is open, a filter screen is arranged in the trapping cover, a gas outlet pipe is arranged at the top of the trapping cover, and a gas outlet pipe is arranged at the bottom of the trapping cover. An air exhaust mechanism is arranged in the air outlet pipe, harmful gas is sucked into the trapping cover from the bottom of the trapping cover through the air exhaust mechanism and then is exhausted from the air outlet pipe, and two protection mechanisms are arranged on the trapping cover and are symmetrically arranged front and back; the bottom opening of the collecting cover is sealed through the two baffles, dust falling on the filter screen is received by the baffles, pollution of a pickling solution on the lower portion due to falling of the dust on the filter screen is avoided, the dust intercepted on the filter screen is brushed off by the brush through movement of the scraper, cleaning of the filter screen is achieved, and the cleaning effect of the pickling solution on the filter screen is improved. The service life of the filter screen is prolonged.

The utility model relates to the technical field of slurry pumps, and discloses a slurry pump casing which comprises a first mounting seat, an outer casing is arranged on one side of the first mounting seat, a second mounting seat is fixedly arranged on the side, away from the first mounting seat, of the outer casing, and a slurry discharging sleeve is fixedly arranged on the side, away from the outer casing, of the second mounting seat. A sealing mechanism is arranged on the inner side of the slurry discharging sleeve, and a heat dissipation grid is fixedly arranged on the outer side of the outer shell. According to the pump shell for the slurry pump, one side of a slurry discharging pipe extends to the inner side of an extrusion gasket and is connected with a slurry discharging opening in the pump shell, a box cover is opened, and a locking bolt penetrates through a locking ring to be in threaded connection with a locking nut, so that the locking ring extrudes the extrusion gasket and drives the extrusion gasket to extrude a rubber ring, and the rubber ring is tightened; the connecting position of the slurry discharging pipe and the slurry discharging opening is blocked, slurry leakage is prevented, heat dissipation in the pump shell is facilitated through the arrangement of a heat dissipation grid, and a locking ring and an extrusion gasket are made of nickel base alloy.

The present application relates to a low-cost iron-nickel-based heat-resistant alloy and a high-speed rolling method thereof, and belongs to the technical field of special alloy manufacturing. The present application solves the technical problems of cracking, short tool life, high energy consumption and low efficiency in subsequent solid solution treatment caused by uneven material temperature rise and cooling during high-speed rolling of the existing heat-resistant alloy. In the method of the present application, the heated heat-resistant alloy rolling stock is sequentially passed through the rough rolling, intermediate rolling and finishing rolling units. At least two cooling devices are arranged at the key positions in the later stage of the finishing rolling unit. The polyacrylamide aqueous solution containing specific particle size and proportion of aluminum oxide powder is used for intermittent jet cooling of the wire. The finished wire is directly put into the solid solution furnace for online solid solution treatment and water cooling. The present application realizes the integrated production of heat-resistant alloy wire from rolling to heat treatment with high efficiency, high quality and low energy consumption. The prepared wire has uniform structure and excellent performance, and is especially suitable for manufacturing engine valves.

The utility model provides a nickel base alloy vacuum smelting device which comprises a reaction base body, a fastening ring is connected to the inner wall of the side end of a fastening rod in a sliding mode, a sealing cover plate is rotatably connected to the inner wall of the top of the reaction base body, and a sealing plate is installed and connected to the inner wall of the bottom of a telescopic supporting rod. Driving blocks are in driving connection to the inner walls of the side ends of the driving rods, mounting frames are mounted and connected to the inner walls of the side ends of the driving blocks, locking plates are rotationally connected to the inner walls of the side ends of the rotating rods, locking bolts are mounted and connected to the inner walls of the side ends of the locking rods, and stirring rods are mounted and connected to the interiors of the mounting frames. According to the nickel base alloy vacuum smelting device, through cooperative work of the installation frame, the locking plate and other workpieces, workers can conveniently and rapidly install and detach the stirring rod, so that the poor stirring effect caused by abrasion of the workpieces is reduced, meanwhile, due to the fact that the sealing plate and the fastening ring are used in cooperation, the sealing effect is good, and the sealing effect is good. And a workpiece at the top can be sealed.

The utility model discloses a nickel base alloy smelting device, which relates to the technical field of alloy smelting and comprises a smelting cylinder and a blanking assembly, a heat preservation cover is arranged outside the smelting cylinder, and the blanking assembly used for facilitating forming and blanking is arranged on the front side of the inside of the smelting cylinder. And the discharging assembly comprises a forming disc, a forming groove, a cooling cavity, a side connecting pipe and a conveying water pipe, the forming groove is formed in the surface of the forming disc, the cooling cavity is formed in the middle of the forming disc, the side edge of the forming disc is connected with the side connecting pipe, and the conveying water pipe is arranged in the side connecting pipe. According to the nickel-based alloy smelting device, nickel-based alloy is cast and formed in the smelting barrel, the situation that impurities enter the smelting barrel to affect forming during pouring-out is avoided, the two forming grooves can be alternately used under overturning of the forming disc, and the cooling cavity conducts conveying through one side of the conveying water pipe and outflow through the other side of the conveying water pipe, so that the forming grooves are cooled, and nickel-based alloy forming is assisted; the interior of the side connecting pipe is used for installing the conveying water pipe and controlling rotation adjustment of the forming disc.

An inductor has a main magnet core, a coil mounted around the main magnet core, and a residual magnet encapsulating the main magnet core and partially encapsulating the coil. The main magnet core is made of a main magnet core powder containing amorphous iron base material and nickel base material powders. The residual magnet is made of a residual magnet powder containing a main magnet powder and a soft magnet powder including an iron-silicon-chromium alloy powder and a carbonyl iron powder. Thus, through a low-loss feature of the amorphous iron base material and nickel base material powders, a loss of the main magnet core is reduced. Furthermore, a magnetic permeability of the residual magnet matches a magnetic permeability of the main magnet core. A magnetic leakage is further avoided, and the alternating current resistance is reduced. A quality factor and a conversion efficiency are enhanced.

To provide a positive electrode active material for a lithium secondary battery capable of securing high energy density and long life characteristics while securing price competitiveness by minimizing cobalt content, and to provide a positive electrode and a lithium secondary battery including the same.SOLUTION: A positive active material for a rechargeable lithium battery, the positive active material being a bimodal type including a first lithium nickel-based composite oxide of large particles and a second lithium nickel-based composite oxide of small particles, the first and second lithium nickel-based composite oxides including nickel in an amount of greater than or equal to about 80 mol% based on 100 mol% of total metals excluding lithium, the ratio of the weight (A) of the first lithium nickel-based composite oxides to the weight (B) of the second lithium nickel-based composite oxides in the positive electrode active material is 1 to 4, the span {(D90 - D10) / D50} of the first lithium nickel-based composite oxides is 0.9 to 1.2, the span of the second lithium nickel-based composite oxides is 0.9 to 1.2, and the span of the positive electrode active material is 1.5 to 2.SELECTED DRAWING: Figure 1

A hollow turbine airfoil or a hollow turbine casting including a cooling passage partition. The cooling passage partition is formed from a single crystal grain structure nickel based super alloy, a cobalt based super alloy, a nickel-aluminum based alloy, or a coated refractory metal.

The invention relates to the technical field of metal surface engineering, and particularly discloses nickel-based coated tungsten carbide and a preparation method and application thereof.The nickel-based coated tungsten carbide is composed of, by weight, 14.15%-17.19% of chromium, 1.68%-1.89% of molybdenum, 1.23%-1.5% of boron, 8%-15% of pretreated tungsten carbide, 0.5%-1.5% of yttrium oxide and the balance nickel and inevitable impurities. According to the invention, the contents of Cr, Mo, B and Y2O3 are accurately controlled, so that the components of a nickel-based alloy matrix are optimized; the high content of Cr and Mo provides a material basis for subsequent in-situ nitriding strengthening, and pitting corrosion resistance and uniform corrosion resistance of the coating are remarkably improved; due to the introduction of Y2O3, the effects of refining crystal grains and strengthening the structure are achieved; the proper WC content (8-15 wt%) is introduced to be combined with the tough nickel matrix, and the inherent defect that a traditional high-WC-content coating is large in brittleness is overcome.

The utility model discloses a nickel base alloy wire cleaning device, including the cleaning platform, the left side of cleaning platform top wall is equipped with a primary cleaning tank, the right side of cleaning platform top wall is equipped with secondary cleaning tank, and the inside installation of primary cleaning tank and secondary cleaning tank has ultrasonic generating equipment, and the left side of cleaning platform top wall is equipped with the placement roll through the U shape support seat, and the right side of cleaning platform top wall is equipped with the winding roll through the U shape support seat, and the outer wall of cleaning platform is equipped with the cleaning guide subassembly, and the right side of cleaning platform top wall is equipped with the traction subassembly, the utility model relates to alloy wire cleaning technical field, and the nickel base alloy wire cleaning device adopts the cleaning mode of ultrasonic wave and rolling brush, carries out double -washed through primary cleaning tank and secondary cleaning tank, can clean up the dirt of nickel base alloy wire surface residue completely, and the cleaning fluid adhered on the surface of wire material is adsorbed clean through the clean sponge, so that nickel base alloy wire material has good clean effect, reduces the residue of wire material surface dirt.

The utility model discloses a N06625 nickel base alloy hot continuous rolling rough rolling before oxide skin flushing device, including edge cleaning device, plane cleaning device, connecting device, edge cleaning device is equipped with two pairs, one pair of edge cleaning device is symmetrically arranged through connecting device in the both sides of support, and the other pair of edge cleaning device is symmetrically arranged through connecting device in one end of support, plane cleaning device is equipped with two groups, one group plane cleaning device both ends with symmetrically arranged in the both sides of support a plurality of electric push cylinder II fixed connection, and the other group plane cleaning device is located between two pairs of edge cleaning device and support fixed connection, and a plurality of conveying rollers are rotatably connected on the support. The utility model separates the edge of alloy slab and upper and lower surface through edge cleaning device and plane cleaning device and cleans, thereby prevents the edge of alloy slab and prevents the quality problem from appearing in the subsequent rolling process.

The present application belongs to the technical field of surface treatment of metal base material and biomass particle composite electrodeposition, and discloses a preparation method of AZ91D magnesium alloy surface nickel base nano pearl powder composite electrodeposition layer. The cathode adopts a magnesium alloy sample after chemical pre-deposition, the anode adopts a nickel plate with mass fraction greater than 99%, both are connected to the negative pole and the positive pole of the pulse power source respectively, are immersed in the pre-configured electrodeposition liquid and placed in an ultrasonic generator for electrodeposition, and the ultrasonic generator works in a variable frequency mode. The formed deposition layer has smooth appearance, compact and uniform, the hardness is increased by 20 times to 22 times compared with the magnesium alloy substrate, increased by 1.3 times to 1.6 times compared with the pure nickel layer on the magnesium alloy surface electrodeposition, and the self-corrosion current density is decreased by 2 orders of magnitude to 3 orders of magnitude compared with the magnesium alloy substrate.

The invention belongs to the technical field of high-temperature alloy connection, and provides a 650 DEG C supercritical diffuser nickel base alloy welding structure and a preparation method thereof. According to the method, an amorphous nickel-chromium-iron-silicon-boron alloy interlayer foil (the thickness is 20-60 microns, and the amorphous nickel-chromium-iron-silicon-boron alloy interlayer foil comprises 5-25 wt% of Cr, 0-30 wt% of Fe, 1-8 wt% of Si, 0.5-4 wt% of B and 45-75 wt% of Ni) is placed on a butt joint interface of two nickel-based alloy components, and a welding joint area is formed through instantaneous liquid phase diffusion welding (the temperature is 1000-1150 DEG C, the pressure is 2-20 MPa, and heat preservation is conducted for 1-10 h). The ultra-low leakage airtight sealing performance that the equivalent welding layer thickness is 0.05-0.50 mm and the leakage rate reaches 1 * 10 <-1 > * 10 Pa.m / s is realized; the problems that according to a traditional welding method, the requirements for high-temperature strength, creep fatigue reliability and ultralow leakage rate airtight under the 650 DEG C supercritical working condition are difficult to meet at the same time, the contradiction between a manufacturing end low-temperature short-time wide process window and the service end long-term structure interface stability is caused, and interface wetting filling and brittle phase control are difficult to collaboratively optimize are solved.

The invention discloses a composite hydrogen evolution electrode and a preparation method thereof, the composite hydrogen evolution electrode comprises a nickel substrate, the nickel substrate is provided with a nickel-sulfur alloy layer, and the nickel-sulfur alloy layer is loaded with a copper element. The preparation method comprises the following steps: placing a nickel substrate in an electroplating solution containing a nickel source and a sulfur source for electrochemical deposition, and forming a nickel-sulfur alloy layer on the nickel substrate; activating the nickel substrate on which the nickel-sulfur alloy layer is formed; and placing the activated nickel substrate in a copper plating solution for electroplating to obtain the composite hydrogen evolution electrode. The nickel-sulfur alloy is deposited on the nickel substrate, the nano-copper is deposited on the surface of the nickel-sulfur alloy, the hydrogen evolution performance of the nickel-sulfur electrode is improved by introducing the copper element, and the stability is enhanced while the overpotential is reduced.

The invention provides a preparation method of a diamond wire composite bus, which comprises the following steps: S1, drawing a wire rod until the diameter is 3.5-4mm, and then quenching; s2, a nickel-based alloy with the thickness of 0.5-1.5 mm is wrapped outside the steel wire rod processed in the step S1, and then rolling is carried out; s3, the wire rod wrapped with the nickel-based alloy is drawn, so that the wire rod and the nickel-based alloy are fused, and a semi-finished product of the composite bus is obtained; and S4, through multi-pass wet drawing, the diamond wire composite bus with the nickel base alloy with the thickness of 2-3 microns on the surface layer is finally obtained. According to the preparation method of the diamond wire composite bus, the steel wire rod is wrapped with the nickel-based alloy, the diamond wire composite bus is obtained through the steps of rolling, drawing and the like, brass electroplating is not needed, brass stripping and nickel plating are not needed at the diamond wire production end, electroplating raw and auxiliary materials and related electric loss are omitted, and the production process is more environmentally friendly and healthy.

The invention discloses a microalloyed iron-nickel-based precision alloy strip production process, and relates to the technical field of iron-nickel-based alloy preparation, and the process mainly comprises the steps of batching, vacuum induction melting, electroslag remelting, forging, hot rolling, cold rolling and heat treatment. On the basis of a traditional 4J42 alloy, a trace amount of ferrous sulfide is added, rare earth is added to serve as a nucleation center of manganese sulfide, MnS is controlled to be in a spherical shape, deformation is not likely to happen in the rolling process, transverse plasticity and toughness losses are reduced, and the material performance is more uniform; surface oxidation and defect inheritance in the heating process are inhibited through measures of coating the surface of the forging stock with an antioxidant, enhancing milling surface treatment and the like, the thermal expansion coefficient of spherical MnS is closer to that of a matrix, pitting sources are reduced, and corrosion resistance is improved; the rare earth is converted into high-melting-point rare earth oxysulfide, so that the corrosion resistance is enhanced; by controlling sulfur, the proportion of a shearing surface and a fracture surface of the strip in stamping and punching is increased, and the problems of peeling and cracking in the stamping and forming process are solved.

The invention relates to the technical field of porous electrodes, and particularly discloses a porous nickel-molybdenum-cobalt hydrogen evolution cathode and a preparation method and application thereof. The cathode is prepared through the following steps that S1, a nickel base subjected to cleaning pretreatment is placed in absolute ethyl alcohol for use; s2, nickel sulfate hexahydrate, cobalt sulfate heptahydrate, ammonium molybdate tetrahydrate, a conductive agent and a complexing agent are sequentially added into deionized water and fully stirred, a first mixed solution is obtained, then an auxiliary complexing agent is added, the pH value is adjusted to 5-11, and an electroplating solution is obtained; s3, a nickel base serves as a cathode, a ruthenium-titanium electrode serves as an anode, the cathode and the anode are placed in the electroplating solution, electrochemical deposition is conducted, and an electro-deposition nickel base material is obtained; and S4, washing and drying the electrodeposited nickel-based material to obtain the porous nickel-molybdenum-cobalt hydrogen evolution cathode. According to the prepared cathode, an alloy coating is formed on the surface of the nickel base, the coating is combined with the porous characteristic of the foamed nickel base, the catalytic activity of the electrode in alkaline water electrolysis hydrogen production is improved, and meanwhile the corrosion resistance of the electrode is improved.

This invention discloses a ruthenium-nickel-based bifunctional self-supporting electrode, its preparation method, and its applications. The method includes preparing a deposition electrolyte using nickel chloride hexahydrate, ruthenium chloride, terephthalic acid, and triethylamine hydrochloride as solutes and N-dimethylformamide as a solvent; immersing pretreated nickel foam in the electrolyte as the working electrode, using a platinum mesh as the counter electrode and an Ag / AgCl electrode as the reference electrode, and applying a current of -10mA to -20mA for deposition; after electrodeposition, washing the loaded nickel foam with DMF, ultrapure water, and ethanol, and then vacuum drying to obtain the ruthenium-nickel-based bifunctional self-supporting electrode. The ruthenium-nickel-based self-supporting bifunctional electrocatalyst provided by this invention can be used for water splitting reactions, exhibiting both good HER and OER activities, and can achieve high hydrogen evolution and oxygen evolution current densities at relatively low overpotentials.

The invention discloses a two-stage mixing end leading-out structure for a small header of a 650 DEG C efficient ultra-supercritical tower type boiler, relates to the technical field of boilers, and solves the problem that main and reheated steam outlet headers of the tower type boiler reach the upper use limit of ferrite heat-resistant steel. The device comprises a collection box, a connecting pipe, small collection boxes and outlet pipe joints, wherein each pipe panel of a final-stage superheater or a final-stage reheater of the tower-type boiler is communicated with one small collection box through the outlet pipe joint; two connecting pipes are symmetrically arranged on the small header, and the small header is communicated with the collecting header through the connecting pipes; the collecting header, the connecting pipe and the small header are all made of iron-nickel-based high-temperature alloy materials. Through the end part leading-out structure of the two-stage mixed small header of the main and reheat steam outlet header, the temperature deviation between the pipes can be reduced, the thermal stress caused by the deviation between the pipes in the conventional large header scheme is effectively eliminated, the wall thickness of the collecting header and the specifications of the pipe joints of the header body are reduced, and the thermal stress and the wall thickness are in direct proportion, so that the thermal stress can be reduced, and the anti-pressure capability is improved.

The application discloses a method for electrochemically upgrading and recycling waste nickel based on a eutectic solvent system, and belongs to the technical field of waste resource recycling and electrochemical catalytic material preparation. The method comprises the following steps: taking a material containing waste nickel as an anode, taking a carrier metal as a cathode, and taking a eutectic solvent as an electrolyte, wherein the electrolyte is dissolved with nickel salt and an additive; through electrodeposition, the nickel in the anode is dissolved out and deposited on the cathode, and the recycling of the waste nickel is completed. The electrochemical upgrading and recycling method based on the eutectic solvent system can efficiently utilize the waste material containing nickel (such as a thermal spraying Reni nickel electrode), and the waste material containing nickel can be used as the anode, so that the green recycling and high-value reuse of the waste nickel resource can be realized. The process is simple in operation, environmentally friendly, and high in resource utilization rate, and has strong industrial application potential and commercial value.

The invention discloses a method for optimizing an iron-nickel-based high-temperature alloy grain boundary carbide for an ultra-supercritical unit pipeline and application, and belongs to the technical field of alloy materials. The grain boundary carbide optimization method comprises the steps that high-temperature solution treatment is conducted, specifically, an iron-nickel-based high-temperature alloy pipe is placed in the temperature range of 140-200 DEG C below the solidus temperature to be subjected to heat preservation treatment, and then water cooling is conducted to the room temperature; the iron-nickel-based high-temperature alloy pipe is placed in the temperature range of 225-315 DEG C below the solidus temperature to be subjected to heat preservation treatment, then water cooling is conducted to the room temperature, and the iron-nickel-based high-temperature alloy pipe with the MC type carbide separated out from the grain boundary is obtained. The MC-type carbide is separated out at the grain boundary of the iron-nickel-based high-temperature alloy pipe, and the carbide is discontinuously separated out in a necklace-shaped form, so that the grain boundary strength is enhanced, the continuous film-forming separation of the brittle M23C6-type carbide on the grain boundary in the later period is inhibited, and the alloy strength and the thermal stability of the grain boundary organization structure are improved.

The invention provides a composite coating for the inner wall of a charging barrel of a die-casting machine and a preparation method of the composite coating, and relates to the technical field of material repair. The preparation method comprises the following steps: cladding first alloy powder on the inner wall of a charging barrel of a die casting machine through a first ultra-high-speed laser cladding process to obtain a heat bearing layer; cladding second alloy powder on the surface of the heat bearing layer through a second ultra-high-speed laser cladding process to obtain a wear-resistant and corrosion-resistant layer; wherein the first alloy powder is one or a mixture of a plurality of materials selected from a Ni-Cr-B-Si alloy, a Ni-Cr-B-Si-Mo alloy, and a Ni-Cr-B-Si-Mo-Nb alloy; and the second alloy powder comprises nickel base alloy powder, carbide ceramic powder, cobalt-coated Cr3C2 or nickel-coated Cr3C2 powder, AlCrTiVSi high-entropy alloy powder and Y2O3 powder. According to the scheme based on the composite coating, the service life of the die-casting machine charging barrel can be prolonged.

The invention provides a cobalt-nickel separation coefficient prediction method and system based on structural knowledge embedding, and belongs to the field of cobalt-nickel resource recovery. The method comprises the following steps: constructing a cobalt-nickel separation coefficient original data set comprising leachate composition parameters, extractant structure information and operation condition parameters; performing data preprocessing and feature engineering processing on the original data set to obtain a feature data set meeting machine learning modeling requirements; respectively constructing a reference prediction model and a knowledge embedding prediction model in which domain knowledge features are introduced on the feature data set, performing model performance comparison, and determining a candidate prediction model; performing hyper-parameter optimization on the candidate prediction model based on a comprehensive evaluation loss function considering prediction precision and over-fitting suppression to obtain a target prediction model; and stable prediction of the cobalt-nickel separation coefficient under the unknown working condition is realized by using the target prediction model. The method can adapt to data distribution difference and stably predict the cobalt-nickel separation coefficient.

The present application relates to the technical field of metal composite material, and specifically discloses a copper-nickel alloy composite plate and a preparation method thereof. The copper-nickel alloy composite plate comprises the following steps: S1, preparing a film forming additive, vacuum degassing, establishing a main melt, adding materials after cooling, and air-atomizing granulation to obtain a granular additive containing chromium, tin, cerium and niobium; S2, complex layer smelting, adding the film forming additive into a copper-nickel base and casting into a complex layer slab; S3-S4, superimposing the complex layer slab with a base layer steel plate treated by removing the oxide skin, sealing and vacuumizing; S5-S6, hot composite rolling of the superimposed slab, and then carrying out sectional diffusion annealing treatment; and S7, surface pre-passivation treatment of the plate. The present application precisely introduces trace elements into the complex layer through the film forming additive, induces the generation of a dense composite passivation film, significantly improves the erosion resistance and pitting corrosion resistance of the composite plate in a sulfur hydrogen-rich and sand-containing seawater environment, and has a good service life.