1004 results about "Thermal spray coating" patented technology

The invention relates to the technical field of wear resistance testing, in particular to thermal spraying coating wear resistance testing equipment which comprises a detection table, a driving cavity is formed in the detection table, an L-shaped groove communicated with the driving cavity is formed in the top of the detection table, a cylinder is arranged on the inner side of the L-shaped groove, a U-shaped table is fixedly connected to the top of the cylinder, and a clamping mechanism is arranged on the U-shaped table. The top of the detection table is fixedly connected with a pair of supporting frames, the bottoms of the supporting frames are fixedly connected with a transverse friction block and a longitudinal friction block respectively, a driving mechanism is arranged in the driving cavity, and the driving mechanism comprises an upper driving motor and a lower driving motor. According to the device, the coating on the test module can move back and forth in the X-axis direction and the Z-axis direction to carry out friction test, a tester does not need to repeatedly clamp and replace the direction of the test module, and a real use scene in which friction is carried out in multiple directions can be simulated more truly, so that a test result is more accurate.

The invention discloses a thermal spraying coating thickness online optimization control method based on digital twinning, and relates to the technical field of intelligent manufacturing, and the method comprises the steps: synchronously collecting multi-modal online observation data and process control observation data in a thermal spraying process, carrying out the time-space alignment, and generating a multi-modal observation set; performing adaptive optimization of multi-modal uncertainty gating on the candidate control set according to the credible thickness field confidence distribution map to generate a control instruction sequence; and the control instruction sequence acts on the thermal spraying process, response feedback data are continuously collected in the execution period, a new multi-mode observation set is generated according to the response feedback data, and real-time closed-loop optimization control is kept. According to the method, the thickness field with high credibility and the credible thickness field confidence distribution diagram can be generated through forward generation and uncertainty quantification of physical guidance, and depth coupling of multi-modal data and physical rules and accurate mapping of uncertainty are achieved.

The invention discloses a nanostructure thermal protection coating resistant to long-time high-temperature oxidation and a preparation method thereof.The nanostructure thermal protection coating takes a ceramic matrix composite material as a matrix, and a bonding layer and a composite component coating are sequentially sprayed to the surface of the matrix. Preparing a nano-structure self-healing additive / Re2Si2O7 spherical powder body; preparing a bonding layer on the surface of the ceramic-based composite material serving as a matrix; and 3, depositing the nano-structure self-healing additive / Re2Si2O7 spherical powder on the surface of the bonding layer to form the composite component coating. According to the preparation method, the self-healing additive / Re2Si2O7 is prepared into the nano-structure spherical powder suitable for thermal spraying for the first time, and a method is provided for implementation of the high-performance material on a thermal spraying nano-structure coating. The prepared coating is stable in phase structure at high temperature, phase change of powder is avoided in the spraying process, and the coating has good thermal expansion coefficient matching performance with a base body.

The invention relates to the technical field of atomization powder making, in particular to a plasma rotating electrode atomization powder making system and method based on target particle size powder, and the system comprises a bar chamber used for storing electrode bars; the material pushing chamber is communicated with the bar material chamber, and a material pushing mechanism and a driving mechanism are arranged in the material pushing chamber; and the atomizing chamber is arranged on one side of the material pushing chamber. The powder characteristic monitoring device is used for monitoring the state of the powder for powder making in real time, process fluctuation can be detected in real time, parameters can be adjusted in time, hysteresis of traditional off-line sampling inspection is avoided, different production modes can be switched by controlling the distribution uniformity characteristic and the distribution width characteristic of the powder at the same time, and the production efficiency is improved. For example, the strict requirements of 3D printing for narrow-distribution and high-uniformity powder are met, for example, for wide-distribution powder needed by thermal spraying, the same equipment can achieve higher production flexibility, and diversified production requirements are met.

The invention belongs to the technical field of rare earth thermal spraying, and particularly relates to spherical yttrium oxide powder for thermal spraying and a preparation method of the spherical yttrium oxide powder. The preparation method comprises the following steps: dissolving a yttrium oxide raw material with nitric acid to obtain a yttrium nitrate solution; sequentially carrying out parallel flow reaction, aging, washing and filtering on part of the yttrium nitrate solution and ammonia water to obtain yttrium hydroxide; sequentially carrying out parallel flow reaction, aging, washing and filtering on the residual yttrium nitrate solution and the mixed precipitant to obtain alkaline mixed yttrium; the preparation method comprises the following steps: mixing yttrium hydroxide and alkaline mixed yttrium with water, then adding a dispersing agent and an adhesive step by step, stirring, and carrying out spray granulation to obtain granulated powder; roasting the granulated powder, adding water, carrying out ball milling, then adding the dispersing agent and the adhesive step by step again, and carrying out secondary spray granulation to obtain secondary granulated powder; and sintering the secondary granulation powder at high temperature, and screening. The spherical yttrium oxide powder obtained through the method is high in absolute purity, high in balling rate, good in fluidity, high in apparent density and low in porosity.

The utility model provides a turning and spraying synchronous forming cutter bar, and relates to the technical field of turning and thermal spraying. The turning and spraying synchronous forming cutter bar comprises a turning tool assembly, a powder spraying assembly and a powder supply assembly. The turning tool assembly comprises a turning tool blade and a turning tool bar. The turning tool bar is provided with a first end capable of installing the turning tool blade and a second end far away from the turning tool blade. The powder spraying assembly comprises a spraying head arranged at the first end in a swinging mode, a rotating gear arranged on the turning tool bar in a rotating mode and a rotary knob. The spray head is provided with a spherical gear part used for being meshed with the rotating gear. The knob is connected to the rotating gear and used for driving the rotating gear to rotate so as to drive the nozzle to swing. The powder supply assembly comprises a main box body connected to the spray head through a pipeline, a powder conveying pipeline connected to the interior of the main box body and used for bearing powder, a heater connected to the powder conveying pipeline and a powder feeding barrel connected to the main box body and used for supplying powder to the powder conveying pipeline.

The invention relates to the field of thermal spraying ceramic coatings, and particularly discloses plasma spraying ceramic powder, a ceramic composite coating and a preparation method of the ceramic composite coating. The plasma spraying ceramic powder is prepared from the following raw materials in parts by weight: 100 parts of nano powder and 10 to 30 parts of silicate glass powder, the nano powder comprises nano Al2O3 powder, nano TiO2 powder, nano CeO2 powder and nano YSZ (Yttria Stabilized Zirconia) powder in a weight ratio of (80-86): 10: 2: (2-8). The plasma spraying ceramic powder has the beneficial effects of being good in fluidity, smooth in surface, high in compactness and good in sphericity degree, and the prepared ceramic composite coating has the beneficial effects of being low in porosity, high in compactness, good in corrosion resistance and long in service life.

The invention relates to a high-temperature electromagnetic functional composite coating and a preparation method thereof, belongs to the technical field of high-temperature electromagnetic functional materials, and solves the problems of narrow absorption frequency band, low absorption loss, poor temperature resistance, poor corrosion resistance, poor environmental medium resistance and poor mechanical property of the existing high-temperature electromagnetic functional coating. From the surface of the substrate from inside to outside, the high-temperature electromagnetic functional composite coating comprises a bonding layer, a protective layer, a functional layer and a surface layer, and the functional layer is made of a thermal spraying composite ceramic material; the multi-layer structure of each layer of the composite coating is mutually coordinated and matched, so that the temperature resistance, the corrosion resistance and the environmental medium resistance of the coating are improved, the electromagnetic wave absorption efficiency is improved, and the service life is prolonged; in addition, the composite ceramic material forming the functional layer has multiple loss mechanisms, the electromagnetic wave absorption frequency band is further widened, and the absorption loss is improved.

The invention belongs to the technical field of battery manufacturing, and relates to a cadmium chloride heat treatment method of a cadmium telluride battery and a device system thereof, and the cadmium chloride heat treatment method comprises the steps of cadmium telluride sample preheating, cadmium chloride thermal spraying and annealing treatment which are carried out in sequence; wherein in the cadmium chloride thermal spraying process, a cadmium chloride solution and a cadmium telluride sample are heated respectively; the cadmium chloride thermal spraying and the annealing treatment are respectively carried out for at least one time. According to the cadmium chloride heat treatment method provided by the invention, the cadmium telluride sample and the cadmium chloride solution are respectively heated before spraying, so that refined and dispersed cadmium chloride particles mainly reach the surface of the cadmium telluride sample, and the continuity and microscopic uniformity of a cadmium chloride film layer are improved; the efficiency of the cadmium telluride thin film assembly is improved, and meanwhile the processing cost and the equipment cost are reduced.

The utility model provides a thermal spraying powder supply device which comprises a powder supply pipe and a powder storage box, a main partition plate and a flow guide plate are fixedly connected in the powder supply pipe respectively, the main partition plate and the powder storage box are movably connected with a transmission shaft through sealing bearings, and the lower end of the transmission shaft is fixedly connected with fan blades. The upper end of the transmission shaft is fixedly connected with a dredging assembly, stirring blades and a fixing frame, meanwhile, the two ends of the fixing frame are symmetrically connected with cleaning plates, powder outlet holes are symmetrically formed in the bottom of the powder storage box, the upper surface of the powder storage box is fixedly connected with a pressure relief pipe, and the upper surface of the pressure relief pipe is slidably connected with a limiting rod through a through hole; the sealing plate is slidably connected into the pressure relief pipe through a limiting rod, and meanwhile the upper surface of the powder storage box communicates with a three-way pipe through a branch air pipe. According to the powder supply device, the powder supply pipe, the branch air pipes, the transmission shaft, the main partition plate, the flow guide plate and the dredging plate are matched, so that the powder supply device can uniformly spray powder, and the probability of unsmooth powder circulation is effectively reduced.

The invention relates to the technical field of hydrogen permeation membranes, in particular to a porous metal tube loaded high-entropy alloy hydrogen permeation membrane as well as a preparation method and application thereof. The preparation method comprises the steps that under the inert atmosphere, molybdenum and copper are subjected to mixed ball milling, then cobalt, chromium, iron and nickel are added for mixed ball milling, molybdenum and copper doped cobalt, chromium, iron and nickel high-entropy alloy powder is obtained, then the molybdenum and copper doped cobalt, chromium, iron and nickel high-entropy alloy powder is sprayed to the surface of a porous metal pipe through a supersonic speed hot spraying film making method, and the porous metal pipe is obtained. And a film layer is formed, and the porous metal tube loaded high-entropy alloy hydrogen permeation film is prepared. The high-entropy alloy hydrogen permeation membrane is high in corrosion resistance and suitable for extracting hydrogen from coke oven gas containing much sulfur / carbon impurity gas, and the problems that a conventional compact metal hydrogen permeation membrane is poor in sulfur / carbon resistance and thermal stability are solved.

The invention relates to a method for coating a mill roll by means of thermal spraying of a powder by means of a spraying column to form an isotropic roughness (Ra) on the surface of said mill roll, wherein the mill roll rotates at a speed (Vr) about the longitudinal axis thereof and the spraying column moves translationally at a speed (Vt), depositing the material in a helicoidal way. After establishing a granulometry (G) of powder to be sprayed, an objective roughness (Ra) and an objective thickness (t) of the coating, the corresponding feed flow (Fr) of powder is determined in an empirical table which shows the objective roughness (Ra) on the basis of the feed flow (Fr) and the granulometry (G) according to a pre-established formula, after which the rotational speed (Vr) and the translational speed (Vt) are defined from an equation that relates the objective coating thickness (t) as a function of the defined feed flow (Fr), the translational speed (Vt) and the rotational speed (Vr).

A method includes receiving, by a computing device, an image indicative of a cross-section of a thermally-sprayed layer. The thermally-sprayed layer defines a porosity comprising a void volume of the thermally-sprayed layer. The image comprises a matrix of pixels, each pixel in the matrix of pixels defining a respective luminance value of a plurality of luminance values. The method includes identifying, based on the luminance values, at least one pixel that is indicative of a void volume in the thermally-sprayed layer. The method includes calculating, based on the at least one pixel that is indicative of the void volume in the thermally-sprayed layer, a total porosity of the thermally-sprayed layer. The method includes determining, by the computing device and based on the at least one pixel that corresponds to a void volume in the thermally-sprayed layer, a quantification of a spatial homogeneity of the porosity of the thermally-sprayed layer.

The invention discloses a preparation method for spraying a nickel-chromium-chromium carbide coating on the surface of a gas turbine part through high velocity oxy-fuel, and belongs to the technical field of preparation of the nickel-chromium-chromium carbide coating through thermal spraying. The preparation method comprises the following steps that preparation before spraying is conducted, and nickel-chromium-chromium carbide powder for thermal spraying is placed in a drying oven to be dried; cleaning is conducted, specifically, the spraying area and the adjacent area of the part are wiped and cleaned, and impurities such as oil stains are removed; protection before sand blasting is conducted, specifically, the non-sand-blasting surface and a small part of the spraying area of the part are protected through a high-temperature-resistant adhesive tape; a sand blowing machine is provided with a 0-0.6 MPa adjustable air pressure air source and is provided with an oil-water separator; spraying is conducted, specifically, a nickel-chromium-chromium carbide coating is sprayed through hypersonic flame; and cleaning is conducted, specifically, after spraying is completed, the spraying protection clamp and the adhesive tape are removed, and floating ash on the surface of the part is cleaned. The wear-resistant coating is prepared on the surface of the aero-engine and gas turbine part by adopting the process, a nickel-aluminum bottom layer does not need to be sprayed in advance, the quality is stable, and the production cost is reduced.

The utility model relates to the technical field of spraying equipment, in particular to thermal spraying coating equipment which comprises a box body, a centering assembly, a rotating assembly, a pressing assembly and a spraying assembly, the box body is provided with a spraying cavity with a front opening, and the rotating assembly comprises a supporting column, a motor, a gear, a gear ring, a bearing, a connecting sleeve and a supporting table. The bottom wall of the spraying cavity is provided with the supporting column and the motor, the supporting column is sleeved with the bearing, a connecting sleeve connected with the outer ring of the bearing is further arranged below the supporting table, the gear ring is arranged on the outer side of the connecting sleeve, the output end of the motor is provided with a gear meshed with the gear ring, and the gear is connected with the bearing. According to the coating equipment for thermal spraying, machining is carried out in the box body, the good protection effect is achieved, materials with different pipe diameters and heights can be clamped and then sprayed, and stable clamping and uniform spraying are guaranteed by adopting upper and lower clamping and matching with the centering assembly.

The utility model discloses a multi-station thermal spraying manipulator, which relates to the field of manipulators and comprises a supporting bottom rod, mounting side blocks are symmetrically welded at two ends of the supporting bottom rod, a top horizontal groove is horizontally formed in the top surface of the supporting bottom rod, bottom moving blocks are uniformly butted with the top surface of the supporting bottom rod, and the bottom moving blocks are movably connected with the mounting side blocks. The top face of the bottom moving block is horizontally in butt joint with a top butt joint block, a telescopic vertical rod is fixedly arranged on the top face of the top butt joint block in a vertically upward mode, an overturning ejector rod is inserted into the top end of the telescopic vertical rod, a control valve body is horizontally and fixedly arranged at the top end of the overturning ejector rod, and a spraying head is arranged at one end of the control valve body. A side box body is fixedly arranged on the side edge of the telescopic vertical rod, a positioning inner plate is horizontally connected to the bottom face of the inner side of a top horizontal groove in a clamped mode, a driving bottom block is fixedly arranged on the bottom face of a bottom moving block, and a multi-point-position spraying control structure is adopted, so that the spraying efficiency is greatly improved; and meanwhile, multi-angle spraying use can be met under the multi-direction adjusting structure.

A manufacturing method of a substrate processing apparatus includes: preparing a main body having a lower end disposed at a first level, having a step formed at a second level higher than the first level, and having an upper end disposed at a third level higher than the second level; forming, by a thermal spray (TSC) method, a first coating from the first level to a height of a fourth level higher than the third level so as to surround the body; forming a bonding unit from an upper surface of the main body to the fourth level; forming a second coating layer on the first coating layer, the second coating layer having a smaller thickness than the bonding unit and a greater hardness than the first coating layer; and arranging a disc on the upper surfaces of the joint unit and the second coating.

The invention discloses a synthesis method and application of rare earth silicate nano composite powder for an environmental barrier coating, and aims to solve the problems of silicon volatilization and poor thermal stability in the thermal spraying process of the rare earth silicate environmental barrier coating. The synthesis method comprises the following steps: 1, preparing asymmetric mesoporous silica based on a nano silicon source; 2, co-precipitating the asymmetric mesoporous nano silicon dioxide serving as a nucleation center and rare earth ions, and calcining to prepare high-activity nano precursor powder; and 3, uniformly mixing the nano precursor with potassium sulfate and sodium sulfate, and calcining to obtain the rare earth silicate nano powder. The asymmetric mesoporous silica is selected as a silicon source, a silicon-rich end is supplemented from the nanoscale, silicon loss caused in the spraying process is made up, meanwhile, the rare earth silicate nano-powder is prepared by combining a chemical coprecipitation method with a molten salt method, the effect of optimizing the purity of the nano-powder is achieved, preparation of a high-quality environmental barrier coating material is achieved, and the application prospect is wide. And the thermal stability of the environmental barrier coating is improved.

The application belongs to the technical field of surface modification, and discloses a method for constructing a ceramic-based self-lubricating, high-wear-resistant and strong-corrosion-resistant coating based on thermal spraying technology and application. The method uses a thermal sprayed ceramic coating as a template, introduces a solid-liquid reversible lubricating phase, and after being heated and melted, the solid-liquid reversible lubricating phase is penetrated into inherent pores and micro / nano cracks in the ceramic coating through a vacuum impregnation process, and is solidified and retained in the defects after cooling, so that a new ceramic-based self-lubricating and strong-corrosion-resistant composite coating is finally obtained. The preparation method is simple, fast and efficient, and does not affect the mechanical properties of the ceramic coating, and the ceramic-based self-lubricating and strong-corrosion-resistant composite coating has low friction coefficient and excellent wear resistance and corrosion resistance.

The invention relates to the technical field of metal powder preparation, and discloses a high-zinc alloy powder preparation method and system.The method comprises the steps of raw material pretreatment and vacuum deep degassing, vacuum melting and active degassing, flow stabilization and diversion and gas-liquid synergistic atomization, solidification and collection under the protective atmosphere, and aftertreatment and packaging under the oxygen-free environment; the system is composed of a vacuum deep degassing unit, a vacuum melting and active degassing unit, a gas-liquid collaborative atomization unit, a powder collecting and cooling unit and an anaerobic operation and packaging unit. The high-quality zinc alloy powder which is low in oxygen content, high in sphericity degree and uniform in component can be stably prepared, and the method is suitable for being applied to the fields of additive manufacturing and thermal spraying.

The invention discloses a gradient coating preparation method combined with a gas phase aluminizing process, and relates to the technical field of thermal spraying, and the gradient coating preparation method comprises the following technological processes: S1, carrying out sand blasting treatment on a common gas turbine hot part material GH3536, and then carrying out transferred arc activation treatment on the sand-blasted surface by using vacuum plasma equipment; s2, Ni < 23 > Co < 20 > Cr < 12 > Al < 4 > Ta < 0.6 > Y powder is sprayed; s3, spraying of Ni < 23 > Co < 20 > Cr < 10 > Al < 0.6 > Y powder is conducted; s4, spraying of Ni20Cr10Al powder is carried out; s5, Ni5Al powder is sprayed; s6, a beta-NiAl layer containing an Al2O3 protective film is prepared on the surface of the coating and the surface of the part through the gas phase aluminizing technology; gradient coatings with different components are prepared through atmospheric plasma spraying, and finally a beta-NiAl layer containing an Al2O3 protective film is formed on the surfaces of the gradient coatings through gas phase aluminizing.

The invention relates to a manufacturing method of a thermal spraying protective coating of an automobile exhaust nitrogen-oxygen sensor chip, which comprises the steps of spherical high-purity aluminum oxide raw material powder preparation, chip pretreatment, high-porosity bonding layer preparation, plasma spraying, heat dissipation graphene nanosheet / polyolefin elastomer film preparation, coating and the like. According to the invention, a chip is used as a substrate, and a silk-screen printing aluminum oxide transition coating is added in chip pretreatment, so that the prepared product is uniform and reliable in coating and high in binding force, a high-pore structure balances thermal shock influence caused by water vapor, invasion of pollutants is blocked under the condition that air permeability is not influenced, the working state of the sensor is improved, and the service life of the sensor is prolonged. The method has great significance in the field.

The utility model discloses a thermal spraying equipment nozzle cleaning device which comprises a supporting leg and a swing plate, a cleaning box is arranged at the upper end of the supporting leg, a connecting port is formed in the outer wall of the cleaning box, a swing motor is installed in the connecting port, a connecting shaft is installed at the end of the swing motor, and the swing motor is connected with the connecting shaft. The swing plate is arranged at the end of the connecting shaft, a clamping hole is formed in the swing plate, a rubber pad is arranged in the clamping hole, and connecting holes are formed in the outer walls of the left end and the right end of the swing plate. According to the nozzle cleaning device for the thermal spraying equipment, a nozzle is connected with a clamping hole in a clamped mode, the nozzle can be connected with a swing plate, the swing plate is driven by a swing motor to swing, impurities, liquid and other substances in the nozzle can be thrown into the cleaning box through swing force, the nozzle is pretreated, and a drawing cleaning head can be stretched randomly; and the drawing cleaning head can be aligned with the nozzle to carry out water washing work on the nozzle.

The invention discloses metal ceramic MAX-phase composite powder for spraying and a preparation method of the metal ceramic MAX-phase composite powder, and belongs to the field of metal ceramic composite materials. The method comprises the following steps: mixing Ni powder, Cr powder and Cr2AlC nano powder with deionized water, a binder and a dispersant according to a specific ratio, and carrying out wet ball milling to prepare uniform slurry; carrying out spray granulation to obtain primary spherical powder; and finally, carrying out spheroidizing treatment on the primary powder by adopting radio frequency plasma under the protection of inert gas to obtain a final product. The core of the preparation method is that through an optimized two-step process, many limitations in the application aspect of an existing MAX phase material are solved, and the composite powder which is high in sphericity degree, good in flowability, compact in interior and stable in MAX phase component is successfully prepared. The powder can be directly used for thermal spraying, and an ideal raw material is provided for preparing a high-performance MAX-phase metal ceramic coating.

The invention discloses a clamping tool based on a process for preparing a ball core coating through thermal spraying, and belongs to the field of ball core spraying. The clamping tool comprises a limiting screw, a telescopic reset spring, a positioning sliding rail, a positioning guide rail connecting rod, an ejector rod and a ball core part; the limiting screw is in threaded connection with one end of the positioning guide rail connecting rod; the telescopic reset spring is located in the positioning guide rail connecting rod, and one end of the telescopic reset spring abuts against the limiting screw. The positioning sliding rail is located in the positioning guide rail connecting rod and abuts against the other end of the telescopic reset spring. The clamping device for preparing the ball core coating is efficient and accurate, the coaxiality between the ball core and the connecting rod piece is improved, and the clamping device has the advantages of being high in production efficiency and the like. The device is used for producing the coating on the outer surface of the ball core, and the deposition efficiency of the coating on the surface of the ball core can be effectively improved. The device is compact in design, easy to operate and suitable for large-scale production, production cost is reduced, and economic benefits are improved.

The invention relates to the technical field of metal ceramic layer preparation, and discloses a method for preparing a chromium carbide metal ceramic coating through a thermal spraying technology and the chromium carbide metal ceramic layer.The preparation method comprises the steps that CoCrMo powder and Cr3C2-NiCr powder are mixed and then added into a ball-milling tank, absolute ethyl alcohol and grinding balls are added into the ball-milling tank, and the mixture is stirred to be uniform; sealing the ball-milling tank and placing the ball-milling tank in a ball mill for ball-milling; and after ball milling is completed, a vacuum drying box is used for drying powder slurry in the ball milling tank, a screen is used for screening the dried powder, and therefore Cr3C2-NiCrCoMo composite powder with the uniform particle size distribution is obtained. And the Cr3C2-NiCrCoMo composite powder is sprayed on the surface of a preheated base body through a thermal spraying technology, and the chromium carbide metal ceramic coating is generated. The Cr3C2-NiCrCoMo chromium carbide metal ceramic coating prepared by the method disclosed by the invention has excellent high-temperature oxidation resistance, hardness and wear resistance.

The invention discloses a preparation method of a high-wear-resistance tungsten carbide coating for the inner surface of stainless steel, and belongs to the technical field of high-wear-resistance coating materials.The preparation method comprises the steps that a stainless steel sample is put into an electroplating pool to be electroplated, and a middle transition layer is formed on the surface of the stainless steel sample block; and the electroplated stainless steel sample block is subjected to surface cleaning and then placed in a CVD reaction hearth to be subjected to vapor deposition, and a tungsten carbide coating is formed on the surface of the stainless steel sample block. The method solves the problems that the inner surface of the stainless steel cannot be effectively coated, the coating thickness is not uniform, the coating hardness is insufficient and the like through conventional PVD, thermal spraying and other surface treatment processes, preparation of the high-hardness and high-thickness tungsten carbide coating on the inner surface of the stainless steel is achieved, the coating binding force is good, and the coating quality is high. The stainless steel can be widely applied to complex-structure stainless steel parts in the fields of aerospace, power generation equipment, petrochemical engineering and the like.

The invention discloses a laser cladding high-entropy alloy carbide ceramic coating and a preparation method thereof, and belongs to the technical field of high-entropy alloy coatings. A laser cladding technology is adopted, a matrix and high-entropy alloy-phenolic resin composite powder are subjected to in-situ melting through a high-energy laser beam, firm metallurgical bonding between the coating and the matrix is achieved, elements at an interface are in gradient transition, and the shear strength exceeds 100 MPa. The single-layer deposition thickness can reach more than 500 microns and can reach the centimeter level through multi-layer accumulation, so that the coating thickness capability is remarkably improved; the prepared coating is high in compactness, the porosity is lower than 5%, and the key technical contradiction that the thickness and the compactness cannot be synergistically optimized in traditional thermal spraying is effectively solved. Besides, the in-situ carbonization reaction under the methane atmosphere is innovatively adopted, the complex high-temperature synthesis process of traditional high-entropy carbide powder is avoided, the preparation cost is greatly reduced, the preparation period is greatly shortened, and the method has the remarkable advantages of being efficient, low in cost and high in performance.

A metal alloy powder composition consisting essentially of Nickel (32 to 42 wt %)-Aluminum (40-50 wt %)-Molybdenum (10-20 wt %)-Boron (0.1-2.0 wt %) in the particle size between 125 to 5 microns range and manufactured as an alloy by gas or water atomization process. This composition reduces the melting point of the alloy and minimizes the oxidation of aluminum in the alloy during thermal spray. This improves the integrity of the coating on electrodes in the alkaline water electrolysis application and the life of electrodes.

The invention relates to a thermal spraying coating preparation process parameter optimization method based on machine learning so as to obtain a high-quality thermal spraying coating. According to the method, a small-sample-size process parameter data set is constructed through high-throughput preparation of the thermal spraying coating, the porosity and long-term soaking corrosion performance of the coating serve as output parameters, and the relevance between the coating preparation process parameters and the porosity and corrosion resistance of the coating is established through a machine learning method; furthermore, more excellent thermal spraying coating preparation process parameters can be predicted in a wider process parameter range, and a high-quality coating can be obtained. The method can be widely applied to rapid optimization of a thermal spraying coating preparation process and stable control of coating quality.