112 results about "Coating deposition" patented technology

The invention discloses a partitioned multifunctional metal double-cavity vacuum coating process and system, and belongs to the technical field of material surface treatment. The process comprises the steps of base material pretreatment, double-cavity preparation, vacuum inspection, first cavity bottom layer deposition, vacuum transfer, second cavity functional layer deposition and cooling, the double cavities are provided with corresponding target materials respectively, and parallel operation and vacuum seamless transfer are supported; the system comprises double coating cavities, a vacuum transmission channel, a vacuum acquisition and control module, a coating deposition module, a workpiece bearing module and a process parameter regulation and control module, and each of the double cavities is provided with a multi-target mounting rack and carries a real-time monitoring unit and an intelligent control system. Integrated preparation of the composite film layer and synchronous production of multifunctional workpieces are achieved, operation gaps are eliminated, the compactness and adhesive force of the film layer are improved, parameter deviation and the reject ratio are reduced, and batch production requirements are met.

The invention relates to the technical field of coating production, in particular to a method for improving the corrosion resistance of a coating through a PVD and ALD composite preparation technology, according to the method, the advantages of PVD and ALD preparation technologies are combined to deposit the coating, ALD intercalation layers are deposited at different positions of the coating prepared through PVD, and therefore the defects generated in the PVD coating deposition process are overcome. And analyzing the section and phase of the deposited coating by utilizing characterization equipment, and detecting electrochemical and corrosive wear properties in a 3.5 wt.% NaCl solution. The PVD coating is subjected to intermediate or surface treatment by adopting an ALD preparation technology, so that the electrochemical performance of the coating is effectively improved.

The invention discloses a manufacturing process and equipment of a high-performance long-service-life cold working die. The process comprises the following steps: quenching and tempering a cold-work die steel blank to obtain a tempered martensite structure; plasma nitrocarburizing is carried out to form a reinforced diffusion layer; the micro-pit array is machined through pulse laser, and an annular heat-affected softening zone is formed around the opening of the pit; depositing a hard coating, and forming a cantilever structure on the edge of the micro pit; wherein plasma nitrocarburizing is carried out in a low-pressure plasma atmosphere, laser processing and coating deposition are carried out in a vacuum or protective atmosphere, and transfer among the steps is not exposed to the atmosphere. The invention further provides corresponding manufacturing equipment which comprises a heat treatment cavity, a plasma nitrocarburizing cavity, a surface micro-texture machining cavity, a coating deposition cavity and a vacuum transfer cavity. According to the invention, the hardness mutation between the coating and the matrix is relieved, a hardness gradient transition structure is constructed, the fatigue stripping resistance of the coating is obviously improved, and the service life of a mold is prolonged.

The invention belongs to the technical field of industrial coating engineering and automatic control, and relates to a steel member surface coating thickness control system based on machine vision, which is characterized in that electromagnetic characteristics of a liquid coating are sensed in real time through a dielectric parameter detection module; the rheological and dynamic behaviors of the coating are analyzed by utilizing a microdynamics measurement module and combining impact force sensing and structured light imaging; a direct measurement result of the machine vision module on the three-dimensional morphology of the coating is fused, and the information and the pose data of the spray gun are synchronously packaged into a physical state vector by means of a multi-source data fusion module; matching an optimal strategy through a collaborative decision control module, and generating a control instruction; and finally, a controlled fluid resonance perturbation field is formed in the jet flow, so that in-situ and self-adaptive regulation and control of the coating deposition process are realized. The method solves the problems that a traditional spraying process lacks real-time, quantitative and self-adaptive control capability on the coating deposition process and guarantees the coating thickness uniformity and the process stability.

The invention provides a galvanized steel wire rope plastic coating device, and relates to the technical field of steel wire ropes, the galvanized steel wire rope plastic coating device comprises a box body, a storage cavity, a circulating conveying mechanism, a fixed shell I, a plastic coating mechanism, a fixed shell II and an air drying mechanism; a complex assembly process is not needed, the early-stage investment and installation difficulty of an enterprise can be reduced, meanwhile, all the mechanisms are compact in layout and small in occupied space, and the device is suitable for production scenes of different scales and convenient to apply and popularize in industrial production; stable conveying of the plastic coating material is achieved through the circulating conveying mechanism, deposition and blockage of the plastic coating material can be avoided, uniform feeding of the plastic coating mechanism is guaranteed, the problem that feeding of existing equipment is unstable is solved, meanwhile, the conveying amount of the plastic coating material can be accurately controlled by adjusting the rotating speed of a motor, and the feeding reliability is further improved; the output blade of the plastic coating mechanism can enable redundant plastic coating materials to flow back to the storage cavity through the output port, recycling of the plastic coating materials is achieved, material losses are reduced, the production cost is reduced, and the problem that waste of the plastic coating materials of existing equipment is serious is solved.

The invention provides a preparation method of a high-entropy nitride anti-erosion coating, which comprises the following steps: (1) polishing, cleaning and drying a sample in sequence, placing the sample in a vacuum coating chamber, introducing argon Ar, adjusting the flow of the argon Ar, and carrying out ion bombardment cleaning on the surface of the sample; (2) acquiring the optical emission intensity of the plasma after argon Ar is introduced and the optical emission intensity of the plasma after nitrogen N2 is introduced; (3) depositing a high-entropy alloy transition layer on the surface of the sample; (4) depositing a high-entropy nitride anti-erosion coating on the surface of the sample; and (5) taking out the sample to complete preparation of the coating on the surface of the sample. The preparation of the high-entropy nitride anti-erosion coating is completed by adopting a bipolar high-power pulse magnetron sputtering technology and an ion source to jointly construct a high-density plasma film forming environment, so that the nitridation reaction on the surface of the target material can be effectively inhibited, and the characteristic peak intensity of the plasma is kept unchanged; and the stability of plasma components in the film forming process is ensured.

This invention provides a high-entropy alloy nano-coating high-temperature oxidation-resistant modification preparation process, belonging to the field of coating modification technology. The high-entropy alloy nano-coating high-temperature oxidation-resistant modification preparation process specifically includes the following steps: S1. Target material selection and preparation; S2. Alloy substrate treatment; S3. Low-temperature nanocrystalline coating deposition; S4. Coating densification treatment; S5. Low-temperature recovery annealing; S6. Pre-oxidation treatment. Through the synergistic process of low-temperature preparation of the alloy nano-coating, densification annealing, and pre-oxidation, the high-temperature strength and phase stability of the coating are improved by utilizing the lattice distortion effect. A thermodynamically stable protective oxide film of aluminum oxide and chromium oxide is generated in situ on the surface, solving the problems of traditional chromium-based coatings such as few main components, poor oxidation resistance, and short lifespan. This significantly improves the service reliability and safety of nuclear reactor structural materials under high-temperature irradiation environments.

The invention relates to the technical field of electroplating pools, in particular to a device for improving electroplating uniformity of a VCP electroplating line, which comprises an electroplating pool, a metal mesh plate is fixed in the electroplating pool, a rotating handle is arranged below the metal mesh plate, the rotating handle is rotatably connected to a bottom plate of the electroplating pool, blades are fixed on the surface of the rotating handle, and a mounting frame is mounted at the top of the electroplating pool. A servo motor is mounted on the surface of the mounting frame, the power output end of the servo motor is in transmission connection with a driving shaft, and the bottom end of the driving shaft penetrates through the metal net plate and then is inserted into the top end of the rotating handle; the device has the beneficial effects that the rotating handle is driven to rotate through the servo motor, the blades are driven to forcibly stir electrolyte, metal ion diffusion is accelerated, and the concentration gradient is eliminated; electrolyte circulation is promoted in the stirring process, so that metal ions generated by anodic oxidation reaction are rapidly supplemented to a cathode area, the deposition rate of a plating layer is stabilized, and the phenomenon that the edge thickness of a workpiece is out of tolerance is reduced.

An apparatus is provided for coating deposition, particularly by chemical vapour deposition, on three-dimensional glass articles such as bottles. The apparatus lends itself to incorporation in a plant for a continuous production process for glass containers.

This invention belongs to the field of thin film deposition technology and relates to a method for improving the uniformity and quality of DLC coatings prepared by PECVD. Based on PECVD equipment, a method for preparing uniform, highly wear-resistant / corrosion-resistant DLC coatings on irregularly shaped workpieces by controlling a rotating magnetic field is provided. The method includes a vacuum chamber system, a dynamic magnetic field generator, a radio frequency plasma excitation system, a dual-path gas supply system, and a vacuum and pressure regulation system. The dynamic magnetic field generator uses two sets of ring-arranged neodymium iron boron permanent magnets, driven by a motor to rotate the magnetic field vector. The top spray electrode and the bottom ring ground electrode form the main discharge circuit. The rotating magnetic field increases the number density of active groups and molecular kinetic energy during deposition. Different gas ratios are used during coating deposition to achieve high-density, high-quality DLC coatings. The workpiece for DLC coating deposition is placed at the bottom of the reaction chamber. This method is used to deposit uniform, highly wear-resistant, and highly corrosion-resistant DLC coatings on planar or irregularly shaped workpieces.

The invention belongs to the field of waste battery material recovery, and provides a waste battery material recovery method based on a plasma chemical vapor deposition technology. Firstly, a network compound with a metal chelating function is synthesized and forms stable combination with active sites on the surface of an electrode in subsequent coating deposition, and harmful metal ions are effectively captured; secondly, a fluorine-containing imidazolyl-quaternary ammonium salt network compound is designed, and the fluorine-containing imidazolyl-quaternary ammonium salt network compound is endowed with excellent surface passivation and chemical stability by a fluorinated group; in the stripping process, the active material and the metal current collector are separated by periodically adjusting the temperature and combining the plasma technology, the stripped active powder can be further extracted and purified through acid pickling treatment, and the metal current collector is combined with a fluorine-containing compound and an inorganic silica network deposition process. The metal surface is endowed with good corrosion resistance and reprocessing performance, the method is suitable for recycling of electrode materials in waste batteries, and meanwhile the recycling value of related materials is improved.

The present invention relates to a method for coating filaments, the method comprising: depositing a coating on elongate filaments (11) in a treatment zone (ZT) of a reactor (3) by fluidized-bed chemical vapor deposition from a gas phase introduced into the reactor, the method further comprising (i) monitoring the fluidization of the filaments, and (ii) one or more corrective actions for the fluidization of the filaments, each being triggered if an absence of fluidization of the filaments is detected during monitoring and each comprising a temporary modification of the flow rate of a dispersion gas, during which an increased flow rate at least equal to three times a nominal flow rate imposed during deposition is imposed, this increased flow rate being imposed for at least (3) seconds.

The invention discloses a method for preparing a composite nitriding coating on the surface of titanium alloy, and belongs to the technical field of surface engineering and coatings. The coating at least comprises a nitride strengthening layer and a hard coating in sequence from inside to outside. The hard coating comprises a composite coating, the composite coating comprises a nano multilayer structure formed by alternately depositing A layers and B layers on the surface of the nitride strengthened layer, the A layers are TiAlN layers, the B layers are TiSiC-N layers, and the TiSiC-N layers have nano-scale (Ti, Si) (C, N) composite phases. According to the method, one or more hard coatings are deposited on the surface of the nitride layer through the composite process of double-glow combined active screen plasma nitriding and post-treatment hard coating deposition, and the problems that a single nitriding layer is insufficient in hardness, limited in wear resistance and the like are successfully solved. And two procedures are continuously finished in the same vacuum cavity, so that the interlayer bonding strength is ensured, and the production efficiency is improved.

This invention relates to a method and system for optimizing coating trajectory to ensure uniformity of spacecraft coating thickness. The method includes: acquiring a model of the surface to be coated, generating a regular grid initial coating curve and setting constraint parameters; mapping the curve to a complex surface using a pseudo-projection algorithm, and generating a fully covered, non-intersecting initial trajectory after trajectory correction; based on an experimentally calibrated coating deposition model, constructing a multi-objective optimization function that minimizes coating thickness deviation while considering trajectory smoothness and operation time, using trajectory waypoint coordinates, coating gun attitude quaternions, and coating segment duration as optimization variables, and applying constraints such as coating distance, velocity, and attitude; using an interior-point solver for iterative optimization, limiting variable iteration deviations to ensure model accuracy; and outputting an directly executable optimized trajectory. This invention can automatically adapt to the coating requirements of complex surfaces, significantly improve coating thickness uniformity, control deviations within the allowable range of aerospace processes, and effectively improve operational accuracy and efficiency.

The utility model relates to superhard material processing technical field, and disclose a kind of PCBN composite sheet edge strengthening treatment device, including rack, rotary workbench, laser processing module, coating deposition module and control system.The PCBN composite sheet edge strengthening treatment device, in combination with laser microstructured processing and nanometer coating deposition, significantly improve the hardness, wear resistance and bonding strength of PCBN composite sheet edge, solve the problem of single technical effect limited, rotary workbench design realizes the continuous processing of multiple PCBN composite sheets, improves production efficiency, reduces cost, accurately controls each module parameter by PLC system, ensures the consistency and stability of processing, reduces manual intervention, integrates laser processing, coating deposition and cooling system in one, compact structure, easy to operate.

The utility model discloses a kind of coating devices for suspension spring production, it is related to suspension spring coating technical field, including bottom plate, the upper end of the bottom plate is fixedly connected with coating storage box, the inside of the coating storage box is provided with stirring assembly, the upper end of the coating storage box is rotatably connected with carousel, the upper end of the carousel is fixedly connected with multiple spring racks, the upper end of the bottom plate is provided with baffle, the baffle is located at the outside of coating storage box, the coating device for suspension spring production of the utility model is rotated by the output end of driving motor and drives rotating rod, and then stirring rod is stirred in coating storage box, solve coating deposition stratification problem from root, ensure that the concentration of coating that nozzle sprays is uniform, effectively improve the thickness uniformity and appearance quality of suspension spring coating, substantially improve product yield, reduce rework cost due to coating quality defect.

The application discloses a kind of integrated preparation devices of three-dimensional bionic optical functional materials, it includes printing unit, gas filtering structure, evaporation unit, control unit and driving unit, the printing unit is square box shape, printing unit is provided with baffle inside, printing unit is divided into two intervals by baffle, baffle upside is provided with printing chamber, baffle downside is provided with driving chamber, printing unit right end is provided with joint surface, printing unit is connected with evaporation unit by joint surface interference, evaporation unit is composed of hot evaporation chamber and control chamber;The present application is green, safe and intelligent, fully-closed operation, and is equipped with a gas filtering device, which will not harm the operator, and is easy to use. From three-dimensional modeling to model structure evaporation, to model coating deposition control, only intelligent one-key operation is required. The integrated forming cancels the intermediate transfer link, ensures the operation sealing and evaporation uniformity, greatly improves the coating deposition forming rate and material performance.

The invention provides a surface treatment method for a valve plate base body and a valve plate. The method comprises the steps that a valve plate base body is subjected to polishing, ultrasonic cleaning and drying treatment; the cleaned valve plate is placed in a vacuum ion nitriding furnace to be subjected to nitriding treatment under the treatment conditions that a vacuum pump is started for air exhaust, after the pressure value in the furnace reaches a first specified value, high pressure is started, argon is introduced, the vacuum degree of a furnace cavity is kept at a second specified value, the surface layer starts to be heated through high-energy ion bombardment, and the surface layer is heated; after the temperature of the workpiece reaches 480-510 DEG C, nitrogen is introduced, the volume ratio of nitrogen to argon is set to be 1: 6, the air pressure is adjusted to 300-500 Pa, and heat preservation is conducted for 6-8 h; and the valve plate subjected to nitriding treatment is transferred to multi-arc ion plating equipment for coating deposition, and the treatment conditions of coating deposition are as follows: nitride is selected as a deposition material, the substrate temperature is kept at 450 DEG C in the deposition process, the target current is controlled to be 120-150 A, the vacuum degree is 2-3 Pa, and the deposition time is 60-90 min.

The invention relates to a TiAlBSiN coating, the coating (100) being deposited on the surface of a substrate (1) and comprising, along its coating thickness, three different coating portions, a first portion (5), a second portion (10) and a third portion (50), the first portion (5) being deposited closer to the surface of the substrate (1) than the second portion and the third portion, the second portion (10) is directly deposited on the outermost surface of the first portion (5), the third portion (50) is directly deposited on the outermost surface of the second portion (10), the first portion (5) is formed by one or more layers, in any case, of at least one adhesive layer, the first portion (5) is completely in a cubic crystal phase, and the third portion (50) is formed by a layer or a plurality of layers, in any case, of at least one adhesive layer. Or a crystalline phase mixture of a cubic crystalline phase and a hexagonal wurtzite crystalline phase, where, if a crystalline phase mixture, the cubic phase is predominantly presented, and at least one adhesion layer comprises titanium and nitrogen; and wherein the second part (10) is formed of one or more layers, in any case of at least one supporting layer, and wherein the second part (10) exhibits a hexagonal wurtzite crystalline phase completely, or exhibits a crystalline phase mixture of a cubic crystalline phase and a hexagonal wurtzite crystalline phase, and if crystalline phases are mixed, predominantly wurtzite phase, and if crystalline phases are not mixed, predominantly wurtzite phase. And the at least one support layer comprises titanium, aluminum, nitrogen and at least one chemical element selected from boron and silicon; and wherein the third part (50) is formed from one or more layers, in any case, from at least one functional layer, and wherein the third part (50) presents a cubic crystalline phase completely or presents a crystalline phase mixture of a cubic crystalline phase and a hexagonal wurtzite crystalline phase, and wherein if crystalline phases are mixed, the third part (50) presents a cubic phase predominantly, and wherein the third part (50) is formed from one or more layers, in any case, from at least one functional layer. The at least one functional layer includes titanium, silicon, and nitrogen.

A process for manufacturing a coated glass article, said process comprising the following steps in order: (a) providing a glass substrate having a surface, (b) forming a gaseous mixture comprising a source of tin, a source of fluorine, molecular oxygen and water, (c) delivering the gaseous mixture to the surface of the glass substrate, and (d) depositing a coating based on fluorine-doped tin oxide on the surface of the substrate using chemical vapour deposition (CVD), and (e) exposing the substrate to an environment that is under a vacuum and is at a temperature of from 450°C to 750°C for at least 5 minutes.

A process for manufacturing a coated glass article, said process comprising the following steps in order: providing a glass substrate having a surface, forming a gaseous mixture comprising a source of tin, a source of fluorine, molecular oxygen and water, delivering the gaseous mixture to the surface of the glass substrate, and depositing a coating based on fluorine-doped tin oxide on the surface of the substrate, wherein the coating based on fluorine-doped tin oxide comprises two or more layers based on fluorine-doped tin oxide, wherein the process is carried out using chemical vapour deposition (CVD), and wherein the molar ratio of the source of fluorine in the gaseous mixture during deposition of the layer based on fluorine-doped tin oxide that is directly beneath the outermost layer based on fluorine-doped tin oxide : the source of fluorine in the gaseous mixture during deposition of the outermost layer based on fluorine-doped tin oxide is from 0.01 to 1.5.

The application discloses a Ti3SiC2 MAX phase coating and a preparation method thereof. The preparation method comprises the following steps: depositing a Ti-Si transition layer on the surface of a substrate by using a high-power pulsed magnetron sputtering technology; introducing a carbon hydride; alternately depositing a Ti-Si coating and a Ti-Si-C coating, and the number of times of the alternately depositing is 2-8 times; and performing vacuum annealing treatment on the prepared coating to obtain the Ti3SiC2 MAX phase coating. The Ti-Si coating and the Ti-Si-C coating are alternately deposited by using the high-power pulsed magnetron sputtering technology, the deposited coating can be phase formed at a lower temperature in the subsequent heat treatment process, the generation of impurity phases can be reduced, and the purity of the MAX phase is improved.

The invention discloses a cutter for machining a composite material and a thin metal net material and a preparation method, the cutter comprises a fine grain hard alloy cutter, the outer surface of the fine grain hard alloy cutter is provided with a coating, and the coating sequentially comprises a carbide transition layer and a diamond coating layer from inside to outside; the fine grain hard alloy cutter is provided with a step section, and the step section is of a step type spiral structure and is provided with a chip groove. The step section is divided into a first cutting section and a second cutting section from head to tail; by optimizing the helical angle, the front and rear angles, the cutting edge parameters and the radial and axial size parameters and cooperating with a high-adhesion coating deposition and size precise control process, the machining precision is remarkably improved, and the service life is remarkably prolonged. According to the scheme, the strength of the tool is kept, meanwhile, the bonding performance and the thermal shock stability of the coating are improved, and the method is suitable for drilling and finish machining of high-compounding-ratio materials such as carbon fiber / copper net composite plates.

This invention belongs to the field of test probe fabrication technology, specifically a method for preparing a special coating for spring probes. The method includes: depositing a Si gradient transition layer on the surface of a spring substrate, followed by oxygen plasma activation treatment to form a specific active pinning layer of 3 to 5 nanometers; then depositing a DLC coating using a specific process, employing a specific peak voltage and a specific duty cycle pulse bias mode to pre-position dispersed carbon clusters. The SixOy pinning layer provides dual anchoring of chemical bonding and mechanical interlocking for the DLC coating during cyclic stress-induced graphitization transformation, preventing microcracks from propagating to the interface and ensuring the safe operation of the adaptive lubrication process. This invention overcomes the technical bottleneck of fatigue spalling of DLC coatings on elastic components, significantly improving the service life of spring probes.

The invention belongs to the technical field of nuclear fuel preparation, and discloses a coated particle dispersion fuel and a preparation method thereof.The preparation method comprises the steps that firstly, a powder atomic layer deposition device is started, inert gas is continuously introduced to remove gas in a reactor and a pipeline, and the powder atomic layer deposition device is prepared through the atomic layer deposition process; the method comprises the following steps: performing sintering aid coating deposition on silicon carbide powder in a fluidized state, including precursor adsorption, chemical reaction, inert gas purging and cyclic repetition until coating components and thickness reach the standard, depositing other types of sintering aids according to sintering aid component design requirements, performing coated particle dispersion fuel pellet forming, and performing densification sintering on the pellet, thereby obtaining the coated particle dispersion fuel pellet. The silicon carbide-based coated particle dispersion fuel is obtained; the coated particle dispersion fuel is prepared by the method. According to the preparation method, through SiC powder modification, the dosage of the sintering aid in the preparation process of the coated particle dispersion fuel is optimized.

An insulating ceramic gasket for liquid crystal display and its preparation method. The gasket comprises a ceramic matrix composed of a main crystal phase, an auxiliary phase and a reinforcing phase, has a gradient density structure, low dielectric constant, small dielectric loss and high volume resistivity. The surface has a micro-nano composite texture, which gives anisotropic wetting characteristics; the inside has a directional pore structure; the reinforcing phase is distributed in a three-dimensional network, with higher edge density than the center; and the surface is covered with a gradient functional coating. The preparation method comprises high-energy ball milling to prepare powder, in-situ reaction to generate auxiliary phase, multi-layer lamination and magnetic field assisted forming, two-step atmosphere sintering, laser micro-texturing and coating deposition. The present application provides excellent electrical insulation, mechanical strength and durability, and is suitable for high-precision liquid crystal display.

The utility model relates to the technical field of coating deposition, and discloses a tray and coating deposition equipment, and the tray comprises a tray body and a movable clamping assembly. The tray with the structure is applied to coating deposition equipment, the clamped piece is a glass substrate, the movable clamping block clamps the glass substrate from the edge part, and the tensioning elastic piece tensions the movable clamping block towards the inner side, so that the movable clamping block applies clamping force towards the middle area of the tray body to the glass substrate, and the glass substrate can be effectively clamped and fixed; the glass substrate is prevented from being separated from the movable clamping block; when the glass substrate is heated to expand and deform, due to the fact that the tensioning elastic piece has the elastic deformation capacity and can extend in the extending direction of the embedding groove, and the movable clamping block synchronously moves outwards, the tray can adapt to the expanded and deformed glass substrate, and compared with a fixed clamping block, extrusion on the expanded glass substrate can be relieved; and the glass substrate is prevented from being separated from the movable clamping block or broken due to overlarge stress.

This invention discloses an isostatic pressing graphite tantalum carbide coating deposition apparatus for epitaxial substrates, specifically relating to the technical field of coating deposition equipment. It includes a support base, with a convergence deposition assembly mounted on top of the base. The convergence deposition assembly includes a connecting plate for support, which is located on top of the base. Through the corresponding cooperation of various structures, the two first heating plates are brought close together to initially limit the material, preventing displacement during subsequent coating deposition. The material can converge between the first and second heating plates, ensuring that the coating is concentrated between the first and second heating plates and the material during deposition, improving deposition efficiency. Furthermore, the trapezoidal cross-section formed by the combination of the second and first guide plates continuously causes the coating to converge downwards, resulting in a higher density.

This invention discloses a composite strengthening process for the surface of a hot-dip galvanized molten zinc transfer pump impeller, comprising the following steps: ① impeller surface pretreatment; ② supersonic spraying of a WC+15%Co coating; ③ laser remelting: laser remelting the WC+15%Co coating; ④ precision polishing of the remelted layer: polishing the WC+15%Co coating to achieve a surface roughness <Ra0.4μm; ⑤ PVD TiCN functional coating deposition: preparing a TiCN functional coating on the WC+15%Co coating surface using physical vapor deposition, achieving a TiCN coating surface roughness <Ra0.2μm. This composite strengthening process, through the synergistic treatment of supersonic spraying, laser remelting, and PVD coating, effectively seals surface pores in cast steel and cast iron impellers while simultaneously providing excellent corrosion resistance and zinc adhesion resistance. This completely solves the technical problem of cast steel and cast iron impellers being prone to zinc adhesion and corrosion in molten zinc, significantly extending impeller service life and improving hot-dip galvanizing production efficiency.

The invention discloses an anti-cavitation coating deposition method and device based on laser reflection domain delayed heating, the device comprises a workbench, a Laval nozzle, a reflecting plate structure, an adjusting mechanism and a control monitoring mechanism, the central axis of the Laval nozzle is perpendicular to the surface of a base plate, the reflecting plate structure comprises a pair of symmetrically arranged lateral reflecting plates, and the adjusting mechanism is arranged on the lateral reflecting plates. The laser beams are distributed along the powder flow direction and jointly form a V-shaped semi-closed laser reflection domain; the adjusting mechanism is used for supporting and driving the first lateral reflecting plate and the second lateral reflecting plate to realize angle adjustment; the control monitoring mechanism comprises a PLC control panel, an industrial PC and an industrial camera; the PLC control panel receives a driving instruction generated by the industrial PC and controls the adjusting mechanism to drive so that the powder spots can be coupled with the light spots. According to the invention, the high-speed powder particles can obtain longer-time laser irradiation and softening effects before reaching the substrate, so that the plastic deformation and deposition thickness of the particles are improved.