1011 results about "Plasma sprayed" patented technology

The invention discloses a carbon fiber cloth reinforced damaged concrete structure detection and analysis method, and relates to the technical field of concrete structure health monitoring, and the method comprises the steps: extracting a high-risk point set from a three-dimensional damage distribution map, carrying out the weighted K-means clustering to construct a Voronoi subspace, calculating the failure probability, and dividing an emergency repair block set; generating a processing queue by using the repairing blocks according to priorities, planning a spiral path of the plasma spray gun by adopting a TSP algorithm, and generating a surface roughness distribution diagram in combination with laser confocal and white light interference detection; according to the roughness partition matching epoxy resin-carbon fiber dynamic matching scheme, a pressure thermodynamic diagram is generated through finite element simulation and electrode time-sharing electrification. Through fusion of the damage evolution graph and the digital twin model, the plasma etching parameters and the conductivity of the carbon fiber cloth are dynamically adjusted, so that the tensile strength of the repaired area is improved, and full-life-cycle health monitoring is realized.

The invention discloses a carbon fiber composite material surface modification spraying system and a control method thereof. The system comprises a multi-axis robot, a plasma spray gun, a contact angle measuring probe, a 3D line laser scanner, a hyperspectral imager, an environment sensor and a controller. According to the method, the plasma power and the robot speed are adjusted in real time through contact angle measurement and plasma treatment feedback control, so that the CFRP surface can accurately reach a target value, and the coating adhesive force is improved; 3D line laser scanning and hyperspectral imaging are combined, and the posture, the distance, the wet film thickness and the component uniformity of the spray gun are monitored in real time; based on a prediction model fusing a physical model and a neural network, a self-adaptive fuzzy PID control algorithm is adopted, and the coating flow and the track posture of a spray gun are accurately regulated and controlled in real time. The problems of weak coating binding force, uneven thickness, orange peel, sagging and serious coating waste in traditional spraying are effectively solved, and self-adaptive, high-quality and green spraying of workpieces with complex curved surfaces is achieved.

The invention provides a Raney nickel electrode preparation method which comprises the following steps: 1, taking nickel powder with the particle size of 15-75 microns, nickel powder with the particle size of 75-150 microns and aluminum powder with the particle size of 15-75 microns, pouring the nickel powder, the nickel powder and the aluminum powder into a mixer, uniformly mixing without segregation phenomenon, and enabling the nickel powder, the nickel powder and the aluminum powder to respectively account for 70%-79%, 1%-10% and 20%; secondly, a plasma spraying technology is adopted, the temperature is regulated and controlled, so that the nickel powder and the aluminum powder with the particle size being 15-75 micrometers reach a molten state, and the nickel powder with the particle size being 75-150 micrometers reach a semi-molten state; spraying to a nickel net, and activating, cleaning and cutting to obtain a Raney nickel electrode; the nickel powder and the aluminum powder with different particle sizes are reasonably matched in the powder formula, the particle flying speed in spraying is properly increased, the spraying temperature is balanced, the powder with different particle sizes reaches different molten states, and therefore the large-particle nickel powder forms a good support in the coating, the bonding strength of the coating is remarkably improved, and the service life of the coating is prolonged. And the catalyst is not easy to fall off in the use process, so that the efficiency and the stability of the water electrolysis hydrogen production equipment are improved.

The invention discloses a thermal / environmental barrier coating with high thermal insulation, thermal shock resistance and CMAS corrosion resistance as well as a preparation method and application of the thermal / environmental barrier coating. The SiCf / SiC composite material is prepared on the surface of a SiCf / SiC substrate by adopting a plasma spraying-physical vapor deposition technology, and comprises a Si-HfO2 bonding layer, a double-middle layer of Yb2Si2O7 and Yb2SiO5 and a (Dy0.2 Ho0.2 Er0.2 Tm0.2 Lu0.2) 2Hf2O7 top layer from bottom to top, the molar ratio of Si to HfO2 is 15: 85, and the double-middle layer is composed of Yb2Si2O7 and Yb2SiO5. The Si-HfO2 bonding layer provided by the invention has excellent high-temperature performance while providing good bonding force; the Yb2Si2O7 intermediate layer relieves the problem of thermal expansion mismatch between the upper coating and the lower substrate, and further expansion of cracks is hindered through plastic deformation; the Yb2SiO5 middle layer is excellent in water and oxygen corrosion resistance; the (Dy0. 2Ho0. 2Er0. 2Tm0. 2Lu0. 2) 2Hf2O7 top layer provides excellent CMAS corrosion resistance and is excellent in heat insulation performance, and the service temperature can be further increased. The coating has relatively high density and uniformity, presents good mechanical combination with a matrix, can bear thermal shock performance at 1500 DEG C and resist CMAS corrosion, and can be used as a protective coating of a hot end part of an aero-engine.

The invention discloses an electric flame stove capable of effectively inhibiting ozone overflow. The electric flame stove comprises a stove body, a burner mounted on the stove body and a hydrogen pipe, according to the plasma burner, the electrodes are adopted for spraying hydrogen, so that the hydrogen can be quickly diffused in the plasma burner and is in full contact with ozone generated by discharging, the ozone is timely converted into harmless substances such as oxygen and the like, ozone overflow is reduced to the maximum extent, and the risk caused by insufficient combustion of the hydrogen is also reduced; according to the invention, the electrodes are adopted to inject hydrogen, so that additional ejectors are reduced, the manufacturing cost is reduced, and the structure of the electric flame stove is simplified; according to the invention, the electrodes are used for spraying hydrogen, so that the plasma obtains higher temperature, and the plasma spraying speed and spraying distance are improved; according to the furnace end, due to the simplified structure and the simple mounting and dismounting mode, the mounting and maintenance difficulty and workload are greatly reduced.

The invention provides a coating spraying process for an aluminum alloy wheel. The coating spraying process comprises the following steps: S1, surface treatment; s2, spraying a bottom coating; s3, spraying a surface coating; s4, spraying a nano-particle reinforcing layer; s5, thermal plasma spraying post-treatment is carried out; according to the process method, the adhesive force can be improved, the cold plasma treatment technology can efficiently activate the surface of the aluminum alloy, the adhesive force between the coating and the base material is enhanced, and the risk that the coating is peeled off is reduced. And by adding the nano-particle reinforcing layer, the surface hardness of the coating is remarkably improved, and the coating has higher scratch resistance. And the corrosion resistance is enhanced, specifically, the corrosion resistance and the ultraviolet resistance of the aluminum alloy wheel are greatly improved through the optimized formula of the bottom coating and the surface coating, especially the application of a nano reinforcing material and a photocureable coating. The ultraviolet curing technology of the photocureable coating greatly shortens the curing time, the high-frequency production requirement is met, and the production efficiency is improved.

The invention discloses a plasma spraying preparation method for a micro-nano double-layer PTFE coating on the surface of a flexible shaft steel wire, and particularly relates to the technical field of functional materials.The plasma spraying preparation method comprises the following steps that 1, a mandrel and a steel wire are installed on twisting equipment, and an inductive coupling plasma torch tube is installed on a driving guide rail parallel to the mandrel; 2, the pickling solution serves as a raw material, the pickling solution is atomized into micro-droplets through a feeding system and an air supply system, the micro-droplets are rapidly sprayed out of the torch pipe, and pickling spray is formed; 3, the twisting equipment is started, the steel wire is twisted around the mandrel, meanwhile, the driving guide rail is started, the twisted steel wire is subjected to acid pickling treatment through acid pickling spray sprayed out of the torch pipe, and the surface of the steel wire is roughened; 4, feeding of the pickling solution is stopped, high-flow gas is introduced into the torch pipe through the gas supply system to form high-speed gas flow, and the residual pickling solution on the surface of the flexible shaft is blow-dried; and 5, starting an inductively coupled plasma spraying system, injecting the PTFE emulsion serving as a raw material into plasma flame flow, driving a guide rail to move to enable the plasma flame flow to scan the steel wire on the surface of the flexible shaft, and depositing a PTFE coating on the surface of the steel wire. According to the method disclosed by the invention, the double-layered PTFE coating is deposited on the surface of the steel wire by using an inductive coupling plasma spraying process for the first time in the flexible shaft steel wire twisting process, so that one-step rapid preparation of the anti-corrosion coating is realized.

The invention relates to the technical field of ceramic phase coatings, in particular to a high ceramic phase gradient coating preparation process which comprises the following steps: (1) metal matrix pretreatment; (2) constructing a coating material; (3) plasma spraying; (4) thermal shock strengthening treatment; according to the preparation technology of the high-ceramic-phase gradient coating, through reasonable matching of all the components and optimization of the technology, the performance in multiple aspects is obviously improved. In the metal matrix pretreatment stage, a micro-nano rough surface is constructed by adopting a laser texturing technology, so that the roughness of the surface of the matrix is increased, more mechanical occlusion points are provided for the coating, pollutants and an oxide layer on the surface are removed, the activity of the surface of the matrix is improved, and the bonding strength of the coating and the matrix is remarkably enhanced. Mainly, mechanical interlocking is formed between the rough surface structure and the coating, and chemical bonding between the coating and a base body is promoted through the clean and high-activity surface, so that the bonding strength is greatly improved.

The invention discloses a preparation method and application of a plasma etching resistant coating, and relates to the technical field of coatings. Comprising the steps that a yttrium oxide layer is prepared through a low-pressure plasma spraying method, the yttrium oxide layer comprises a relative porous layer (the porosity is 1%-3%) and a compact layer (the porosity is smaller than 1%) which are sequentially stacked, and the relative porous layer is used for making contact with a base body. By adopting low-pressure plasma spraying, the yttrium oxide layer with controllable coating morphology and thickness can be obtained, and the thermal expansion coefficient mismatch between the substrate and the compact layer can be effectively relieved through the relative porous layer close to the substrate; the compact layer on the surface is uniform in structure, low in porosity, excellent in cohesion strength and excellent in plasma etching resistance, plasma and a matrix can be isolated, and generation of particles in the etching process is avoided. The compact layer and the relatively porous coating are both prepared on the basis of the same powder material and by adopting the same coating deposition equipment, so that the production efficiency can be improved, and the production cost and the pollution risk caused by transfer between production steps can be reduced.

The invention provides a preparation method of an MXene-based alkaline electrolytic water hydrogen production electrode. The preparation method comprises the following steps: 1, pretreatment of a base material: cleaning impurities on the base material, drying, and carrying out sand blasting roughening treatment; secondly, first metal powder and second metal powder are weighed and mixed according to a certain proportion to be guided into a powder mixing machine, vacuum drying is conducted after mixing treatment, third metal powder is prepared, the first metal powder is MAX phase powder, and the second metal powder is one or more of metal simple substances or alloys used for water electrolysis hydrogen production; thirdly, third metal powder is deposited on the surface of the pretreated base material through the plasma spraying technology, and a composite coating is obtained; 4, immersing the base material treated in the step 3 into an activation solution for activation; 5, after activation is finished, the base material is taken out and dried, and then the electrode is obtained.The method optimizes the conductivity and hydrophilicity of the electrode, and the diversity of the morphology of a plasma spraying electrode coating is improved.

The invention relates to the technical field of plasma spraying, and discloses a plasma laser automatic composite spraying system which comprises a plasma composite laser spraying gun and an anti-blocking device. The plasma composite laser spraying gun, the powder feeding mechanism and the control panel are arranged to form a stable plasma laser automatic spraying system, efficient spraying of metal components is achieved, meanwhile, an anti-blocking device is further arranged, and through meshing transmission of a main bevel gear, a first auxiliary bevel gear and a second auxiliary bevel gear, the efficient spraying of the metal components is achieved. The first screening assembly and the second screening assembly can rotate synchronously and oppositely, so that bidirectional multiple screening of the spraying powder is achieved, the size of the powder is reduced, the problem of blockage in subsequent use is solved, meanwhile, the stirring assembly can be operated in a linkage mode to further stir the screened powder in a reciprocating mode, the powder is looser, and the powder quality is improved. Therefore, multiple times of screening and stirring of the spraying powder are achieved, the spraying powder is smoothly sprayed and used, and the spraying blocking problem is reduced.

The invention discloses equipment and technology for plasma spray welding of a metal coating on the surface of a ball valve, and relates to the technical field of ball valve machining, the equipment comprises a base, two sliding tables, a lifting table, a clamping assembly, a guide rail mechanism, a sliding seat, a first telescopic support, a second telescopic support and a spray gun rod, the two sliding tables are symmetrically arranged on the base in a sliding mode, and the lifting table is arranged on the sliding tables; a clamping assembly is arranged on the lifting table, the guide rail mechanism is fixedly arranged at the center of the base, the sliding base is arranged above the guide rail mechanism in a sliding mode, a first telescopic support is fixedly arranged on the sliding base, a second telescopic support is vertically and fixedly arranged at the output end of the first telescopic support, and the spray gun rod is fixedly installed on the second telescopic support. The guide rail mechanism comprises a fixed table, a sliding block, a hydraulic telescopic rod, a guide block, a sleeve gasket and a connecting block. According to the method, the remodeling time and cost can be greatly reduced, the application range is effectively expanded, and the spray welding efficiency of the ball valve is further improved.

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 discloses an aero-engine wheel disc plasma spraying repairing process parameter optimization method and system, electronic equipment, a medium and a product, and relates to the field of aero-engine part surface repairing, and the method comprises the steps that a plasma spraying process parameter combination is randomly generated to form a parent population; each group of plasma spraying process parameter combination is used as an individual, binary numbers after each group of plasma spraying process parameters are coded are determined as genes, binary codes formed by arranging the genes in sequence are determined as chromosomes, and the coating performance determined based on the coating performance prediction model is determined as an evaluation basis; and optimizing each plasma spraying process parameter combination based on the parent population by using an NSGA-II algorithm and a coating performance prediction model to obtain an optimal numerical value of the plasma spraying process parameter combination, thereby performing plasma spraying repair on the aero-engine wheel disc. And the parameter optimization efficiency of the plasma spraying process is improved.

The invention discloses a preparation process of a sintering kiln silicon carbide guide roller with thermal shock resistance and high-temperature corrosion resistance. The process comprises the following steps: sequentially carrying out surface pretreatment such as reticulate pattern laser engraving, sand blasting and cleaning and drying on a silicon carbide guide roller substrate; performing plasma spraying on a pure aluminum oxide coating after preheating; carrying out segmented laser remelting on the coating to improve the compactness; and finally, coating the nano silicon carbide slurry, calcining and curing. The thermal shock resistance and the high-temperature corrosion resistance of the guide roller are remarkably improved by enhancing the binding force of the coating through laser engraving, optimizing the density of the coating through laser remelting and combining post-treatment of nano silicon carbide slurry, and the service life of the guide roller in a lithium battery positive electrode material sintering kiln is prolonged.

The invention belongs to the field of material protection, and particularly relates to a method for improving spraying efficiency and adhesive force by adding a binder in the plasma spraying process. The binder comprises one or more of bentonite, silicon dioxide, borax, sodium silicate and aluminum phosphate. The device has the function of quickly melting spraying particles at high temperature and adhering the spraying particles to a spraying substrate, so that the powder spraying efficiency is improved, and the production efficiency is improved. The method comprises the following steps: firstly, carrying out sand blasting treatment on a spraying base material, removing dust and impurities on the surface to enable the roughness to reach 8-10 microns, weighing, and measuring the surface area to be sprayed; and then weighing the binder and putting the binder into a drying oven to be dried at 120 DEG C; the method comprises the following steps: uniformly mixing a binder and an analytically pure nano spraying material according to a certain proportion, and pouring into a plasma spraying raw material tank; and spraying is carried out at the position with the voltage of 30-50 V, the current of 300-600 A, the air pressure of 8 Mpa and the distance of 80-120 mm. The spraying time is 3-5 min, and after spraying is completed, the powder spraying amount is calculated by weighing the mass difference of the base material before and after the base material is weighed. And by adding the binder, the powdering rate is increased from 30.79% to 51.24%, the consumption of spraying materials is greatly reduced, and the working efficiency is improved.

The utility model belongs to the technical field of plasma spraying devices, and particularly relates to a spray gun device for plasma spraying, which comprises a base plate and a plasma spray gun body, side plates are fixedly connected to the left side and the right side of the upper end face of the base plate, a movable frame is arranged between the two side plates, and connecting rods are fixedly connected to the left side and the right side of the movable frame. Movable grooves are formed in the outer walls of the two side plates in a penetrating mode, the other ends of the two connecting rods penetrate through the two movable grooves correspondingly, electric push rods are installed on the left side and the right side of the upper end face of the base plate correspondingly, the output ends of the two electric push rods are fixedly connected with the bottom ends of the two connecting rods correspondingly, and a support is fixedly connected to the lower end face of the movable frame. The inner side of the support is rotationally connected with a lead screw. The automatic gun distance adjusting device realizes automatic and accurate gun distance adjustment, is convenient to operate and high in automation degree, and improves the working efficiency.

The invention relates to the technical field of metal material coatings, in particular to a PVD composite coating and a preparation method thereof. The preparation method comprises the following steps: pretreating a metal matrix to obtain a pretreated matrix; carrying out magnetron sputtering deposition on the surface of the pretreated matrix by using a composite target material, carrying out plasma spraying and laser texturing for multiple times, and repeating the process to form a composite coating crude product containing a third rare earth doped high-entropy alloy coating; the composite coating crude product is subjected to post-treatment, and the composite coating is obtained; wherein the composite target material is AlCoCrFeNi-Y, and the composite oxide comprises aluminum oxide, titanium oxide and cerium oxide. According to the preparation method, the bonding strength, hardness and strength of the composite coating can be remarkably improved through magnetron sputtering deposition of the rare earth doped high-entropy alloy coating, plasma spraying formation of the composite ceramic coating with the gradient content, laser texturing treatment, alternate construction of multiple layers of coatings and the like in combination with elaborately selected materials with low expansion coefficients.

The invention discloses a plasma spray gun for inner hole spraying, which comprises a plasma spray gun body and a suction type dust removal cooling structure, and the suction type dust removal cooling structure is arranged on one side outside an inner hole spray gun head of the plasma spray gun body and comprises a suction type dust removal cooling part; a first reducing hole, a throat section and a second reducing hole which are communicated with one another are sequentially formed in the suction type dust removal cooling part in the axial direction of the suction type dust removal cooling part, the small opening end of the first reducing hole is connected with one end of the throat section, and the large opening end of the first reducing hole is communicated with a gun head cooling gas pipe; the small opening end of the second reducing hole is connected with the other end of the throat section, the large opening end of the second reducing hole is arranged in the direction opposite to the spraying direction of the inner hole spray gun head, and the throat section is communicated with a suction inlet. Compared with the prior art, in the spraying process, it can be guaranteed that a good dust removal effect and a good cooling effect are achieved in the pipeline, and the forming quality of a coating is improved.

The invention relates to a thermal / environmental barrier coating and a preparation method thereof. The coating is of a three-layer structure and sequentially comprises a silicon bonding layer, an ytterbium silicate environment barrier layer and a (RE1xRE21-x) 3TaO7 thermal barrier surface layer from inside to outside. The ytterbium silicate environmental barrier layer is formed by mixing Yb2SiO5 and Yb2Si2O7; a (RE1xRE21-x) 3TaO7 thermal barrier surface layer, wherein x is more than or equal to 0.5 and less than 1; in the preparation method, the high-performance thermal / environmental barrier coating is efficiently prepared by adopting the scheme of synthesizing target powder through a solid-phase reaction, preparing a spraying feed through spray granulation and depositing the coating layer by layer through plasma spraying and utilizing the mechanisms of synergistic improvement of functions of the multi-layer coating, doping modification of rare earth elements and the like. The thermal / environmental barrier coating disclosed by the invention has the advantages of excellent CMAS corrosion resistance, good thermal insulation effect and high layer-to-layer thermal matching, and the service life of the SiCf / SiC composite material can be prolonged under the temperature condition of 1500 DEG C by the thermal / environmental barrier coating.

The invention relates to the technical field of brake disc materials, in particular to a high-wear-resistance anti-corrosion ceramic automobile brake disc and a preparation method thereof. The high-wear-resistance and corrosion-resistance ceramic automobile brake disc is prepared from an aluminum-based composite base material, bonding metal and ceramic through a plasma spraying technology, and the high-wear-resistance and corrosion-resistance ceramic automobile brake disc is prepared in cooperation with an organization structure of a gradient coating. The ceramic coating and the aluminum-based composite base material are designed into the gradient integrated coating with the gradually-changed components, so that the heat insulation performance and the wear resistance of the ceramic coating can be achieved, the good bonding capacity of the ceramic coating and the base body can be guaranteed, the advantages of a metal bonding phase and a hard ceramic phase in the ceramic coating are fully exerted, and the service life of the ceramic coating is prolonged. The bonding force between the ceramic coating and the aluminum-based composite base material is high, the adhesive force is greatly improved, meanwhile, the gradient integrated coating with the gradually-changed components forms the uniform and compact ceramic coating on the surface of the aluminum-based composite base material, and the ceramic coating is high in hardness and high in abrasion resistance.

The invention relates to the technical field of thermal protection coatings, and discloses a high-reflection thermal protection coating and a preparation method thereof.LSTN0.125 powder is subjected to spray granulation and then pre-sintered and sieved, and spherical LSTN0.125 ceramic powder is obtained; the alloy substrate is subjected to roughening treatment, and a bonding layer is prepared on the surface of the alloy substrate through the atmosphere plasma spraying technology; the spherical LSTN0.125 ceramic powder obtained in the step S1 is sprayed on the bonding layer through the atmosphere plasma spraying technology, and an LSTN0.125 ceramic layer is obtained; and the LSTN0.125 ceramic layer is subjected to heat treatment, and the LSTN0.125 thermal protection coating is obtained. According to the invention, the LSTN0.125 with high reflectivity is used as a powder raw material of the coating, so that the high reflection performance of the coating in a near-infrared band can be remarkably enhanced, and the effect of isolating high temperature is achieved.

The invention relates to a method for improving hardness of a cover plate, which comprises the following steps: pretreating the surface of the cover plate to remove oil stain and dust on the surface; a titanium nitride layer is sprayed on the surface of the cover plate, and after the titanium nitride layer is sprayed, residual stress in the titanium nitride layer is eliminated through an annealing process; carrying out curing treatment on the cover plate; wherein the technological parameters for spraying the titanium nitride on the surface of the cover plate comprise that the powder feeding amount is set to be 30-40 g / min, the electric power is set to be 20-40 KW, the argon gas flow is set to be 4-5 L / min, the hydrogen gas flow is set to be 1-2 L / min, the spray gun voltage is set to be 50-55 V, and the spray gun current is set to be 200-300 A. Spraying is conducted on the surface through plasma spraying equipment or electric arc spraying equipment, the spraying process is controlled, and the hardness of the cover plate can be improved. After spraying, heating curing or ultraviolet curing is carried out, and it is ensured that the coating can be firmly attached to the surface of the cover plate after curing. Substances such as titanium nitride are sprayed on the surface of the cover plate, so that the hardness of the cover plate is effectively enhanced.

The invention discloses a high-temperature-resistant and corrosion-resistant aluminum alloy material and a preparation process thereof, and relates to the technical field of aluminum alloy materials. The high-temperature-resistant and corrosion-resistant aluminum alloy material is prepared by carrying out micro-arc oxidation treatment on aluminum alloy, carrying out plasma spraying on a corrosion-resistant spray coating and carrying out heat treatment. The aluminum alloy comprises the following raw material components in percentage by weight: 0.05%-0.15% of silicon, 0.1%-0.2% of iron, 1.2%-1.5% of copper, 0.7%-0.9% of manganese, 2.5%-3.8% of magnesium, 10.2%-12.4% of zinc, 0.02%-0.04% of titanium, 0.08%-0.15% of zirconium, 0.2%-0.4% of scandium, 0.5%-0.8% of silicon nitride whiskers, 0.5%-1% of an aluminum-coated graphene material and the balance of aluminum.

The utility model relates to the technical field of plasma paint spraying equipment, in particular to plasma paint spraying processing electromechanical equipment which comprises an equipment body, a spray gun adjusting mechanism and a spray gun body, the spray gun adjusting mechanism is arranged on the left side of the equipment body, the spray gun body is arranged on the left side of the spray gun adjusting mechanism, and a spray gun nozzle is fixedly connected to the left end of the spray gun body. According to the powder spraying device, through the arrangement of the powder conveying pipe, the powder outlet pipe, the confluence cover, the circulation sleeve and the small air pump, powder to be sprayed can be sprayed out in a dispersed mode through the powder conveying pipe and the powder outlet pipe, waste or pollution caused by the fact that the powder to be sprayed drifts away is prevented through the confluence cover, and the powder to be sprayed can be sprayed out in a dispersed mode. The airflow generated by the small air pump forms rotational flow through the circulation sleeve, the powder in the confluence cover is blown up, the powder is taken away by the plasma jet, and the device can limit the drifting range of the powder to be sprayed, so that the utilization rate of the powder to be sprayed is greatly improved, and the spraying efficiency is effectively improved.

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The invention discloses an automobile structure assembly gluing heat treatment method and system based on frequency conversion microwaves. The method comprises the steps that the surface of an automobile structure assembly is subjected to activating treatment through a plasma spraying technology; the method comprises the following steps: coating a to-be-glued automobile structure component with an adhesive, carrying out heat treatment on the coated automobile structure component by adopting a variable-frequency microwave generator, dynamically adjusting the microwave frequency to realize uniform heating of the interior of an adhesive layer, monitoring the temperature field distribution of the adhesive layer in real time, and dynamically adjusting the microwave power output; in the microwave heat treatment process, pressure is applied synchronously to promote discharge of bubbles in the adhesive layer and improve the compactness and mechanical property of the adhesive layer; and a gradient cooling mode is adopted for cooling the automobile structure assembly subjected to heat treatment. According to the embodiment of the invention, the bonding quality and durability of the automobile structural component can be remarkably improved through frequency adjustment, temperature monitoring, bubble removal and pressure application in the microwave heating process.

The invention provides a plasma torch device compatible with near-normal-pressure photoelectron spectroscopy, and relates to the field of in-situ spectroscopy characterization. According to the plasma torch device compatible with the near-normal-pressure photoelectron spectroscopy, gas conveying and plasma generation can be synchronously carried out at the same position, the uniformity of the plasma entering the in-situ characterization experiment chamber is guaranteed, the plasma can be concentrated in a test area, and the test efficiency is improved. The plasma concentration on the surface of the sample is increased, and the surface reaction of the sample is improved. The invention further provides an in-situ photoelectron spectroscopy characterization device.

The invention discloses a high-strength stainless steel seamless steel pipe and a machining process thereof, and relates to the technical field of alloy treatment. The processing technology of the high-strength stainless steel seamless steel tube comprises the following steps: step 1, pretreating the stainless steel seamless steel tube to obtain a pretreated stainless steel seamless steel tube; 2, an ion nitriding process is adopted for conducting synchronous nitriding treatment on the inner pipe and the outer pipe of the pretreated stainless steel seamless steel pipe, and the nitrided stainless steel seamless steel pipe is obtained; and 3, the plasma spraying technology is adopted, the surfaces of the inner pipe and the outer pipe of the nitrided stainless steel seamless steel pipe are each coated with a compression-resistant protective layer, and the high-strength stainless steel seamless steel pipe is obtained through microwave treatment. Pretreatment, plasma nitriding treatment and plasma spraying treatment are sequentially conducted on the inner pipe and the outer pipe of the stainless steel seamless steel pipe with the specific component proportion, the compressive strength, the fatigue resistance and other performance of the inner pipe and the outer pipe of the stainless steel seamless steel pipe are synergistically enhanced, and the quality of the stainless steel seamless steel pipe is improved.

The invention discloses a nickel-silicon-boron nitride abradable sealing coating and application and a preparation method thereof, the abradable sealing coating comprises a bottom layer material in direct contact with a base material and a surface layer material located on the surface of the bottom layer material, the bottom layer material is nickel-chromium alloy, and the surface layer material is nickel-silicon-boron nitride. When the coating is prepared, automatic plasma spraying equipment is adopted, firstly, nickel-chromium alloy powder is adopted as a bottom layer material to be sprayed on the surface of a base material, and then nickel-silicon-boron nitride powder is adopted as a surface layer material to be sprayed on the surface of the bottom layer material. The prepared nickel-silicon-boron nitride abradable sealing coating can be applied to low-pressure turbine discs, high-pressure turbine guiders and sealing seats of aero-engines and gas turbines. According to the method, a traditional manual flame spraying operation mode is replaced, the safety is improved, the material utilization rate and the spraying efficiency are improved, the preparation period is shortened, the material cost is reduced, and the structure property, the bonding strength and the thermal shock resistance of the abradable seal coating are improved.