447 results about "Surface engineering" patented technology

The invention provides an aeronautical part multi-process parameter cooperative surface treatment standardization optimization method, and relates to the technical field of aeronautical manufacturing surface engineering, and the method comprises the following steps: S1, constructing a process parameter hierarchical coding system and a correlation mapping model; s2, establishing a parameter solving method based on multi-objective collaborative optimization; s3, constructing a modular process chain; s4, establishing real-time monitoring and closed-loop control of multi-source data fusion; s5, establishing a digital simulation body and verifying the digital simulation body; and S6, constructing a whole-process quality tracing database. According to the method, dynamic collaborative optimization of multiple process parameters is realized through parameter hierarchical coding, association mapping and a cross-process-chain intelligent decision model, the parameter conflict rate is reduced, and the process decision efficiency is improved. Meanwhile, a self-adaptive optimization engine based on reinforcement learning can correct process parameters in real time, the batch consistency of key performance indexes is improved, and the process stability and the product quality are remarkably improved.

The invention discloses a double-PHA barrier system for a paper-based container and a paperboard as well as a preparation method and application of the double-PHA barrier system, and belongs to the technical field of paper-based material surface engineering and green packaging. The system sequentially comprises a paper base material, a water-based PHA dispersion hole sealing layer and a PHA extrusion compact layer from inside to outside. According to the invention, the micron-sized PHA dispersoid without cell debris is utilized, so that an efficient hole sealing effect which is difficult to achieve by a high coating amount in a traditional process can be achieved by only needing an extremely low coating amount, and the pinhole defect of an extrusion layer is eliminated from the source. And in cooperation with the modified PHA extrusion layer with the specific crystallinity, the problem of micro-cracking of a single coating during edge rolling forming is cooperatively solved. According to the system, excellent barrier performance is achieved through a thinner bio-based structure, and meanwhile the system has a wide heat sealing window and excellent repulp recycling performance. Compared with the prior art, on the premise that high performance is guaranteed, the consumption amount of packaging materials and the environmental burden are remarkably reduced.

The embodiment of the invention provides a preparation method of a sliding bearing composite coating and the sliding bearing composite coating, and relates to the technical field of surface engineering.The method comprises the steps that nickel-based base coat alloy powder and copper-based alloy surface layer powder are dried; a cladding head is aligned with a to-be-cladded area of the sliding bearing, nickel-based priming layer alloy powder is evenly fed into the surface, aligned with the cladding head, of the sliding bearing through a scraping disc type pressure powder feeder on the basis of first technological parameters, the nickel-based priming layer alloy powder is molten into molten drops, and the molten drops and the surface of the sliding bearing form a micro molten pool; carrying out continuous cladding to form a nickel-based bottoming layer; and after the sliding bearing with the surface cladded with the nickel-based bottom layer is cooled, the nickel-based bottom layer is polished to be smooth, copper-based alloy surface layer powder is evenly fed into the surface of the nickel-based bottom layer through a scraping disc type pressure powder feeder on the basis of second technological parameters, and the copper-based alloy surface layer is formed on the surface of the nickel-based bottom layer through continuous cladding. And the sliding bearing clad with the composite coating is obtained. The quality can be improved.

The invention relates to the technical field of metal surface engineering, and discloses a laser cladding layer based on copper-magnesium-titanium-zirconium gradient design and a preparation method thereof.The preparation method comprises gradient structure design, a microstructure strengthening mechanism, a laser cladding process and thermal field control. By constructing a copper-magnesium-titanium component gradient transition structure and matching the thermal expansion coefficient difference between a matrix and a coating in real time, interface thermal stress accumulation can be dynamically inhibited, the crack defect caused by thermal expansion mismatch of a traditional cladding layer is avoided, ordered diffusion of elements at the interface is promoted through gradual change of gradient components, and the thermal conductivity of the cladding layer is improved. The metallurgical bonding reliability of the coating and a base body is improved, meanwhile, a stable coating is formed, the long-term service stability under the extreme working condition is guaranteed, a microstructure strengthening mechanism regulation and control means is adopted, the coating has a stable and effective protective barrier in a corrosive medium environment, and the problem of performance degradation caused by structure defects of a traditional cladding layer is solved.

The invention relates to the technical field of surface engineering, discloses a method and a system for preparing a yttrium fluoride composite ceramic coating through atmospheric plasma spraying, and aims to solve the problems that the yttrium fluoride coating generates a brittle aluminum fluoride layer on the surface of an aluminum substrate due to fluorine ion diffusion, so that the bonding strength is low, and the yttrium fluoride coating is easy to peel off and lose efficacy. The method comprises the following steps: sequentially carrying out mechanical polishing, ultrasonic cleaning and sand blasting roughening on an aluminum base material; preparing composite powder formed by mixing yttrium fluoride, yttrium oxide and nanometer aluminum oxide according to the mass ratio of 75: 20: 5; sequentially depositing a yttrium oxide transition layer, a composite barrier layer and a yttrium fluoride functional layer by adopting atmospheric plasma spraying; and finally carrying out vacuum post-heat treatment. According to the system, through the synergistic effect of the three layers of gradient structures, the transition layer forms an yttrium aluminate metallurgical bonding interface, the barrier layer inhibits fluorine ion diffusion through the dual mechanisms of nanometer aluminum oxide physical barrier and yttrium oxide chemical adsorption, and the functional layer guarantees the plasma erosion resistance. According to the method, the bonding strength of the coating is remarkably improved to 50 MPa or above, the porosity is lower than 3%, stripping is avoided under 500-hour high-energy plasma bombardment, the process cost is reduced by 40%, and the method is suitable for cavity protection of semiconductor etching equipment.

The invention belongs to the technical field of surface engineering, and particularly relates to a laser cladding iron-based corrosion-resistant and wear-resistant coating and a preparation method thereof. The invention relates to a laser cladding iron-based corrosion-resistant and wear-resistant coating which comprises the following iron-based alloy powder components in percentage by mass: 0.2-0.4% of C; 2.0 to 3.0% of B; the content of Cr is 12.0 to 16.0 percent; 0.5 to 1.0 percent of Ti; 0.5 to 1.5 percent of Si; 0.5 to 1.0 percent of Ni; 0.3 to 0.7% of Ce; s is less than 0.03%; p is less than 0.045%; and the balance of Fe. The coating has the beneficial effects that the coating takes the iron-based alloy powder as a raw material, and the iron-based alloy powder is uniformly cladded on the surface of the H13 steel by utilizing a laser directional energy deposition technology, so that a compact and uniform corrosion-wear-resistant cladding layer is formed, and the service life of the material under the working condition of erosion corrosion of molten aluminum is remarkably prolonged.

The invention provides a preparation method of a high-temperature wear-resistant high-entropy alloy layer with a heterostructure, and belongs to the technical field of metal materials and surface engineering thereof. According to the method, a CoCrFeNiTi high-entropy alloy cladding layer is deposited on the surface of a base body through the laser cladding technology, and the thickness of the cladding layer is controlled to be 0.5-2 mm. The component of the cladding layer is CoCrFeNiTi, the atomic ratio content of Ti is controlled not to exceed 8%, so that the structure of the cladding layer is an FCC phase, and cracking of the cladding layer induced by precipitation of a BCC phase is avoided. A high-entropy alloy cladding layer is heated to 550-950 DEG C and subjected to heat preservation for 2-4 h for annealing treatment, alloy elements in the cladding layer are promoted to be separated out, and small heterogeneous strengthening phases such as a Ni3Ti phase and a laves phase are generated in situ. According to the method, a heterogeneous strengthening structure is formed under the condition of not adding exogenous elements, the strength and hardness and high-temperature wear resistance of the cladding layer are greatly enhanced, the method has the advantages of being simple in process, low in cost, high in applicability and the like, and an effective technical scheme is provided for repairing and remanufacturing of the high-entropy alloy.

The invention relates to the technical field of surface engineering, in particular to a method for depositing a W / WCx coating on the surface of stainless steel and a stainless steel product prepared through the method. The method comprises the following steps: S1, depositing a metal transition layer on the surface of a stainless steel substrate; s2, performing diffusion heat treatment on the stainless steel substrate deposited with the metal transition layer in inert gas at 550-800 DEG C; s3, a pure tungsten layer is deposited on the surface of the metal transition layer obtained after diffusion heat treatment; and S4, depositing a W / WCx composite coating on the surface of the pure tungsten layer. The metal composite coating is deposited after the plating layer is subjected to diffusion heat treatment, the surface hardness of the stainless steel can be remarkably improved, and the hardness value of the stainless steel can be four times or above that of traditional stainless steel; the binding force of the metal transition layer and the stainless steel substrate is larger than 120 MPa, the tungsten-containing coating can be effectively prevented from cracking, and the risk of coating stripping is avoided.

The invention belongs to the field of functional materials and surface engineering, and particularly relates to ant-cave-shaped photo-thermal super-hydrophobic sponge and a preparation method and application thereof.The preparation method comprises the steps that melamine sponge is soaked in an absolute ethyl alcohol solution to be repeatedly soaked and then dried; adding dopamine hydrochloride into the tris buffer solution, stirring to obtain a mixed solution, immersing the surface of the dried melamine sponge into the mixed solution, and drying to obtain PDA (at) MS; the preparation method comprises the following steps: firstly adding PDMS and a curing agent thereof into a cyclohexane solution, stirring, then adding MWCNTs, MnO2 and CuO, stirring to form a mixed solution, then spraying the mixed solution on the surface of PDA (at) MS, and drying to obtain a PMOS (P-channel Metal Oxide Semiconductor); and immersing the PMOS surface into a mixed solution of ethanol containing PFOTES and deionized water, and then taking out and drying. Through the fine cross-scale multi-layer gap structure design, high mechanical durability and excellent light absorption capacity are achieved, and efficient anti-icing, deicing, interface evaporation and fresh water production in an extreme environment are achieved.

The invention belongs to the technical field of semiconductor material surface engineering and defect analysis, and provides an ultrahigh vacuum surface defect detection method and system based on a scanning tunneling microscope, and the method comprises the following steps: carrying out mechanical stripping on a bulk single crystal gallium oxide sample based on the cleavage property of a crystal, and obtaining a gallium oxide single crystal wafer with a micron thickness; placing the stripped single crystal gallium oxide sample in an ultrahigh vacuum environment, and removing atmospheric adsorbates on the surface through vacuum high-temperature annealing treatment; performing sputtering annealing cycle treatment on the surface of the preliminary annealing sample in an ultrahigh vacuum environment to generate an oxygen vacancy defect on the surface so as to obtain a post-treatment sample; the oxygen vacancy concentration, the surface cleanliness and the surface atom orderliness are verified through auxiliary characterization means (XPS, LEED); performing scanning imaging on the surface of the post-treatment sample through a scanning tunneling microscope (STM), and performing oxygen vacancy defect identification by combining with an oxygen vacancy defect STM image simulated by DFT calculation; according to the method, the atomic-scale resolution of the surface of the single crystal gallium oxide sample is detected through the scanning tunneling microscope, the oxygen vacancy defect and other various surface defects are accurately recognized, and the surface state of the sample is comprehensively evaluated.

The invention relates to the technical field of material surface engineering, and discloses a plastic surface treatment process to solve the problems that in the prior art, a plastic surface coating is poor in adhesive force and single in function, and a traditional treatment method is not environmentally friendly. The process sequentially comprises the following steps: pre-treating a base material, and obtaining a clean and stress-free base material through ultrasonic cleaning and thermodynamic stress elimination; performing low-temperature plasma surface activation, performing physical bombardment and chemical modification on the plastic surface by utilizing plasma of specific process gas in a vacuum environment, introducing a large number of active functional groups, and remarkably improving the surface energy; and preparing and applying the functional nano coating, namely forming firm covalent bonds by using the coupling agent in a coating solution containing functional nano particles and a coupling agent and the anchor points, so that the chemical coupling of the functional coating and the plastic substrate is realized.

The invention discloses a TiO2 / GPE / MWCNTs super-hydrophobic durable anti-icing coating and a preparation method and application thereof, and belongs to the technical field of anti-icing surface engineering.The TiO2 / GPE / MWCNTs super-hydrophobic durable anti-icing coating is prepared from graphene, multi-walled carbon nanotubes, hydrophobic titanium dioxide and a binder; wherein the mass ratio of the graphene to the multi-walled carbon nanotubes is 1: 2, and then uniformly mixing the raw materials to obtain a target solution; and spraying the target solution onto a substrate by adopting one-step spraying, and drying to obtain the super-hydrophobic durable anti-icing coating. The super-hydrophobic durable anti-icing coating obtained through the preparation method can be based on photo-thermal and electric heating, is used for meeting the all-weather anti-icing and deicing adaptability of the wind driven generator fan blade, and has low adhesion strength of ice to the coating; and one-step spraying is adopted, so that the technological process is remarkably simplified, and the cost and the energy consumption are reduced.

The invention belongs to the technical field of surface engineering protective coatings, and discloses a nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating as well as a preparation method and application thereof. The preparation method comprises the following steps that firstly, a magnetron sputtering technology is adopted, a CoCrFeMnNi target serves as a cathode target material, and a corrosion-resistant high-entropy alloy coating is obtained through deposition on the surface of a base body; and then, in a three-electrode system, the corrosion-resistant high-entropy alloy coating is placed in an electrolyte containing a nitrogen heterocyclic onium salt compound to be subjected to electro-deposition, and the nitrogen heterocyclic compound modified corrosion-resistant high-entropy alloy coating is prepared. The corrosion-resistant inorganic-organic hybrid coating prepared by the invention has excellent corrosion resistance, can keep high stability and durability in a complex corrosion environment, and has relatively high corrosion potential and relatively low corrosion current density. The coating can remarkably prolong the service life of a structural base material, is suitable for various harsh working conditions, and provides an efficient and reliable protection solution for industrial application.

The invention discloses a method for predicting frictional wear performance of a DLC (diamond-like carbon) coating based on machine learning, and relates to the cross technical field of surface engineering and machine learning, the method comprises the following steps: collecting feature data and label data of the DLC coating, the feature data comprising image data, spectral data and numerical data; cleaning and integrating the acquired data to obtain a multi-modal data set; according to the condition of the data size, a friction and wear performance prediction model of the DLC coating is constructed; based on the obtained multi-modal data set, training a friction and wear performance prediction model of the DLC coating, evaluating the prediction performance of the model by using label data, analyzing samples with large errors, and continuously optimizing the prediction performance; and deploying the trained model in a laboratory management system or an industrial application platform, and rapidly predicting the friction coefficient and the wear rate of the DLC coating. Therefore, by adopting the method, the depiction capability of the microstructure of the DLC coating can be remarkably improved, the prediction precision is improved, and the method is suitable for various combined working conditions, simple in calculation and high in efficiency.

The invention discloses a spheroidal graphite cast iron wear resistance evaluation, regulation and control method based on an electronic work function, and relates to the technical field of surface engineering and performance evaluation.The method comprises the steps that electronic work function data and material characteristic data of the surface of spheroidal graphite cast iron are collected; extracting features of the electronic work function data to obtain electronic work function features; based on the electronic work function characteristics, establishing a mathematical model to analyze the correlation between the electronic work function data and the material characteristic data; and analyzing the relationship between the electronic work function characteristics and the wear resistance, and establishing a comprehensive evaluation model to evaluate the wear resistance of the nodular cast iron. The characterization technology, the complex data analysis method and the multivariate statistical model are combined at the same time, the relation between the electronic structure and the macroscopic performance of the material can be deeply understood, and a comprehensive evaluation model is established to predict the wear resistance of the nodular cast iron; the method guides the design of materials and the optimization of the production process.

The invention relates to automatic coating equipment and method for a variable-thickness ultra-low-density heat-proof coating, and belongs to the technical field of surface engineering heat protection coatings. The automatic coating equipment comprises a spraying robot, a spraying programming system, a servo rotating table, an automatic coating viscosity controller, a flow controller, an automatic terahertz thickness measuring system, an industrial personal computer and the like; performing spraying program programming on the workpiece through a spraying programming system; the spraying robot clamps a spraying gun, and a spraying program is operated to achieve automatic spraying of paint; automatic control of the viscosity of the coating is realized through the automatic viscosity controller of the coating; the flow controller is used for realizing stable control and output of the coating discharge amount; a terahertz automatic thickness measuring system is used for measuring the thickness of a wet film and the thickness of a dry film of the coating; the whole programmed control of the spraying robot, the terahertz automatic thickness measuring system, the rotary table, the guide rail, the flow and the thickness measuring system is controlled through the industrial personal computer, the automatic spraying device is suitable for automatic spraying of the planetary detector back cover structure, and the thickness error is smaller than or equal to + / -3%.

The invention relates to the technical field of surface engineering, and particularly provides a thermal control coating of a spacecraft heat radiator and a preparation method of the thermal control coating. A titanium or aluminum oxide adhesion enhancement transition layer with the thickness of 5-20 nm, a silver reflection layer with the thickness of 100-400 nm, an aluminum oxide oxidation inhibition protection layer with the thickness of 50-200 nm and a silicon oxide emissivity regulation and control layer with the thickness of 100-400 nm are sequentially prepared on the surface of a base material through a magnetron sputtering method. The thermal control coating can be applied to the side, facing strong infrared radiation, of a spacecraft, effectively reduces absorption of energy of the wave band of 0.3-25 microns, improves the heat dissipation capacity in the infrared radiation environment, can also be applied to the portion, facing an infrared optical element, of the spacecraft, effectively reduces the influence of thermal radiation of the spacecraft on infrared optical detection, and improves the detection precision. The method is simple, is high in process implementation, can be applied to the surfaces of rigid and flexible base materials such as aluminum alloy, titanium alloy, carbon fiber composite materials and polyimide films, and is suitable for the surfaces of the base materials in various shapes such as planes, curved surfaces and steps.

The invention belongs to the technical field of hard alloy surface engineering, and particularly relates to an MT-TiCN gradient coating of a hard alloy cutter and a preparation method of the MT-TiCN gradient coating. The coating sequentially comprises a TiN bottom layer, an MT-TiCN gradient layer, a transition layer and an Al2O3 layer from inside to outside, wherein the C / N atomic proportion of the MT-TiCN gradient layer is in gradient distribution from rich N to rich C in the thickness direction. The coating is prepared through a medium-temperature chemical vapor deposition process, the internal stress of the coating is effectively relieved, and the bonding strength, toughness and wear resistance of the coating and a matrix are remarkably improved.

The invention belongs to the technical field of oil and gas field surface engineering CCUS, and discloses a digital twinborn body construction method for a coal-fired flue gas CO2 trapping device. The digital twinborn building method comprises the following steps: collecting static parameters and dynamic parameters of each device in a system A, and building a twinborn space based on an entity system A; constructing a three-dimensional visual model based on the twin space; training and optimizing the three-dimensional visualization model; the three-dimensional visualization model is verified; and according to the verified three-dimensional visual model, pre-judging and regulating and controlling the concentration value of the final captured CO2 in the entity system A in real time. According to the method, the digital twinborn space of the coal-fired flue gas CO2 capturing system A is constructed, dynamic / static data are combined, data exchange and virtual pre-judgment between the digital twinborn space and the entity space are achieved, intelligent sensing and real-time monitoring of the CO2 capturing system A can be accurately achieved, and pre-judgment and analysis of the final captured CO2 concentration value can be accurately achieved.

The invention provides a preparation method of a thermal barrier coating alpha-Al2O3 thermal growth oxide, and belongs to the technical field of surface engineering. The preparation method comprises the following steps: preparing the MCrAlY bonding layer on the surface of a sample; the surface of the MCrAlY bonding layer is cleaned; raising the temperature to a first preset temperature at a heating rate of 50-80 DEG C / s, performing first heating treatment on the cleaned MCrAlY bonding layer, and generating an alpha-Al2O3-based TGO film with a first thickness on the surface of the MCrAlY bonding layer; and cooling to a second preset temperature, and carrying out secondary heating treatment on the MCrAlY bonding layer, so that the alpha-Al2O3-based TGO film on the surface of the MCrAlY bonding layer continuously grows to a second thickness. According to the method, the rapid heating and segmented heat treatment technology is adopted, the thermal barrier coating with the alpha-Al2O3 thermal growth oxide can be produced and prepared in the atmospheric environment, the process is simple, the implementation difficulty is low, and the production cost is low; and meanwhile, the thermal growth stress is reduced, the coating is effectively prevented from premature failure, and the technical requirement for pre-oxidation of the thermal barrier coating of the gas turbine blade is met.

The invention provides a gradient nano composite high-entropy alloy coating system with a self-monitoring function and a preparation method, and relates to the technical field of material surface engineering.The system comprises a functional gradient coating module used for achieving gradient dispersion distribution of nano ceramic particles on the curved surface of a shield hob so as to form a gradient nano composite high-entropy alloy coating; the fiber bragg grating sensing module is used for collecting strain data of the shield hob through a fiber bragg grating sensor integrated on the shield hob; the surface thermal image monitoring module is used for collecting temperature data and image data of the surface of the shield hob through an infrared thermal imager; and the self-adaptive repairing module is used for determining repairing parameters of the shield hob and generating a repairing instruction, so that self-adaptive repairing is carried out on the shield hob through preset repairing equipment according to the repairing instruction. According to the invention, the sensor network is successfully integrated in the gradient coating, and integrated fusion of structural health monitoring and protection functions is realized.

The invention belongs to the technical field of inorganic chemical material preparation, and discloses a high-selectivity crystallization and impurity migration inhibition method of high-purity magnesium hydroxide. The method comprises the following steps: a phenylphosphonic acid surface modifier is introduced in the initial stage of crystallization, molecules of the phenylphosphonic acid surface modifier selectively occupy high-activity Mg < 2 + > sites of a magnesium hydroxide crystal face through bidentate coordination, and a molecular-level interface barrier with steric hindrance and electrostatic repulsion effects is formed, so that a Ca < 2 + > migration path is specifically blocked, and Mg < 2 + > crystallization is not influenced. The preparation method of the high-purity magnesium hydroxide is high in selectivity, high in efficiency, low in cost and environmentally friendly, the interface adsorption behavior of calcium ions is accurately intervened in the initial stage of crystallization through a molecular level surface engineering means, the technical bottleneck that impurity migration and lattice doping are difficult to control in a traditional process is fundamentally solved, and the preparation method is suitable for industrial production. And a brand new technical path is provided for green manufacturing of high-performance inorganic functional materials.

The invention discloses an aluminum-based ceramic composite coating and a preparation method and application thereof, and belongs to the technical field of material surface engineering and remanufacturing. The preparation method comprises the following steps that 1, alumina ceramic particles and titanium powder are subjected to acoustic resonance mixing, and metal-coated ceramic composite powder of a shell-core structure is obtained; secondly, the composite powder is wrapped with an aluminum alloy outer skin, and the aluminum-based ceramic powder core wire is obtained through a drawing process; and thirdly, the powder core wire is sprayed through the high-speed electric arc spraying technology, and the aluminum-based ceramic composite coating is obtained through an arc zone dynamic metallurgy self-propagating exothermic reaction. The aluminum oxide / aluminum composite coating effectively solves the failure technical problems that a traditional arc spraying aluminum oxide / aluminum composite coating is prone to corrosion, abrasion, peeling and the like in a severe service environment, and can be used for manufacturing and operation maintenance of key parts of equipment in the fields of aerospace, water conservancy ocean, national defense science and technology and the like serving under extreme working conditions.

The invention provides a method for preparing a high-entropy alloy coating through an atmosphere plasma spraying and laser remelting composite technology, and belongs to the technical field of surface engineering. The method comprises the following steps that firstly, AlCoCrFeNi high-entropy alloy spraying powder is prepared through a vacuum gas atomization method; then, the surface of the base body is subjected to sand blasting roughening and preheating treatment; then, a high-entropy alloy spraying layer is prepared on the surface of the base body through atmospheric plasma spraying; and finally, the spraying layer is subjected to high-temperature rapid solidification through laser remelting treatment, and the composite coating which is compact in structure and high in bonding strength is formed. By optimizing spraying and remelting process parameters, the problems that a traditional plasma spraying coating is high in porosity and poor in binding force, cracks are likely to be generated in laser remelting and the like are effectively solved, the hardness, compactness and comprehensive performance of the coating are remarkably improved, and the coating is suitable for surface protection of parts under the harsh working conditions of high temperature, abrasion, corrosion and the like.

The present invention discloses a method for evaluating and regulating the wear resistance of ductile iron based on the electronic work function, which relates to the technical fields of surface engineering and performance evaluation. The method includes collecting the electronic work function data and material characteristic data on the surface of ductile iron; extracting the characteristics of the electronic work function data to obtain the electronic work function characteristics; establishing a mathematical model based on the electronic work function characteristics to analyze the correlation between the electronic work function data and the material characteristic data; analyzing the relationship between the electronic work function characteristics and the wear resistance, and establishing a comprehensive evaluation model to evaluate the wear resistance of ductile iron. The present invention combines characterization techniques, complex data analysis methods and multivariate statistical models at the same time. It can not only deeply understand the connection between the electronic structure and macroscopic properties of materials, but also establish a comprehensive evaluation model to predict the wear resistance of ductile iron; this method guides the design of materials and the optimization of the production process.

The invention discloses an ultrasonic abrasive flow surface texture machining device and method based on an auxiliary magnetic field, and belongs to the field of precision machining and surface engineering. The ultrasonic abrasive flow surface texture machining device comprises a workbench, an ultrasonic vibration generating device, a magnetic field generating device, an abrasive flow machining system and a three-dimensional motion platform. The composite abrasive particle suspension is composed of a basic solution, carbonyl iron powder magnetic particles and silicon carbide abrasive particles. According to the method, magnetic particles are guided by a magnetic field to form a chain along magnetic lines of force, ultrasonic high-frequency impact is combined, abrasive materials are driven to impact the surface of a workpiece in order, a submicron texture with the consistent direction and the uniform size is formed, the depth ranges from 0.2 micrometer to 2 micrometers, and the width ranges from 1 micrometer to 20 micrometers. Texture parameters are flexibly regulated and controlled through magnetic field and ultrasonic parameters, and the method has the advantages of being high in machining precision, high in controllability, low in cost, environmentally friendly and recyclable, is suitable for precise parts of bearings and cutters, and can remarkably improve the tribological performance and wettability of the parts.

The invention relates to the technical field of industrial automation and surface engineering, and discloses a coating equipment coating thickness intelligent detection control system based on machine vision, and the system comprises a pneumatic perturbation modulation spraying module which is used for introducing artificial ripples with characteristic wave numbers into a wet film in the spraying process; the transient differential deflection sensing module is used for acquiring transient morphology data reflecting the leveling process of the wet film by adopting a double-trigger imaging technology; the frequency-selecting damping rheological decoupling module is used for extracting attenuation characteristics of ripples in a frequency domain, eliminating the influence of a coating viscosity variable through a rheological dynamic model, and resolving the real physical thickness of the wet film; and the self-adaptive predictive control module adjusts the paint flow or the moving speed of the spray gun based on the thickness deviation. According to the method, high-precision online measurement under the condition that the viscosity of the coating is unknown is realized by utilizing a double-frequency decoupling mechanism, the time lag of a spraying process is overcome by combining Smith pre-estimation control, and the control precision of the thickness of the coating is ensured.

The invention belongs to the technical field of metal surface engineering, and particularly relates to a cold-spraying high-abrasion-resistant corrosion-resistant titanium-based composite coating and a preparation method and application thereof.The preparation method of the cold-spraying high-abrasion-resistant corrosion-resistant titanium-based composite coating comprises the steps of titanium-based composite powder improvement, particle size distribution of the titanium-based composite powder, preparation of the cold-spraying high-abrasion-resistant corrosion-resistant titanium-based composite coating and preparation of the cold-spraying high-abrasion-resistant corrosion-resistant titanium The method comprises the following steps: depositing titanium-based composite powder on the surface of a base material by adopting a cold spraying process to prepare a titanium-based composite coating, and carrying out gradient heat treatment on the titanium-based composite coating to prepare the cold-sprayed titanium-based composite coating with high wear resistance and corrosion resistance. According to the method, through cooperation of composite powder modification, powder particle size grading and a gradient heat treatment process, the method has the advantages that spraying powder raw materials can be sprayed, the cost is low, and the coating structure is uniform, and the prepared titanium-based composite coating is excellent in wear resistance and corrosion resistance and can be applied on a large scale.

The invention belongs to the technical field of surface engineering, and relates to a preparation method of a protective coating for a metal connector of a solid oxide battery. A compact transition metal oxide inner layer is deposited on a metal substrate in a reactive sputtering mode, then a transition metal alloy outer layer is deposited in a metal sputtering mode, a transition metal oxide / transition metal alloy composite coating is formed, and a spinel protective layer is formed after annealing treatment. According to the method, a transition metal oxide inner layer is used as a diffusion barrier layer, diffusion of elements such as Cr from a substrate to a coating and diffusion of oxygen to the substrate in the high-temperature annealing and long-term service process are effectively inhibited, and therefore the thickness of a reaction layer and the thickness of a thermal growth oxide layer are remarkably reduced. The composite coating is compact in structure, stable in component, good in matching with the thermal expansion coefficient of the substrate, excellent in oxidation resistance and low in surface specific resistance, and capable of effectively improving the long-term operation stability and prolonging the service life of the SOC connector.

The invention relates to a sequence-adjustable Ti3C2Tx / GO heterojunction parallel arrangement enhanced multifunctional protective coating and a preparation method thereof, and relates to the technical field of surface engineering.The method comprises the steps that S1, epoxy electrophoretic resin and deionized water are weighed, mixed to be uniform and left to stand so that the epoxy electrophoretic resin and the deionized water can be fully cured, the cured solution is divided into two parts, and a solution A and a solution B are obtained; s2, fully protonated Ti < 3 > C < 2 > T < x > is added into the solution A; adding single-sided protonated GO into the solution B, and respectively stirring at room temperature for 1 hour to obtain a mixed solution A and a mixed solution B; s3, the mixed solution A and the mixed solution B are sequentially poured into an epoxy electrophoresis tank for electrophoretic deposition; and S4, after deposition is completed, residual liquid resin on the surface of the coating is washed away with running water, curing is conducted for 85-100 min at the temperature of 170-210 DEG C, and the multifunctional protective coating is obtained.