415 results about "Thermal spray coating" patented technology

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.

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 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 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 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 the technical field of image data processing, in particular to a thermal spraying coating quality detection system and method based on machine vision, and the method comprises the steps: collecting image index parameters; analyzing the image index characterization value based on the image index parameter; based on a comparison result of the image index characterization value and a preset image index characterization threshold value, determining whether the target sample coating image meets a standard or not; in response to the condition that the coating image of the target sample meets the standard, collecting performance index parameters of the target sample in a historical period; analyzing a performance index characterization value based on the performance index parameter; determining whether the coating quality of the target sample meets a standard or not based on a difference result between the performance index characterization value and a preset performance index characterization threshold value; and in response to the condition that the coating quality of the target sample does not meet the standard, determining a corresponding processing strategy based on a difference value between the performance index characterization value and a preset performance index characterization threshold value. According to the invention, the quality detection efficiency of machine vision is improved through self-adaptive regulation and control.

This invention discloses a laser thermal spraying gun, belonging to the field of laser additive manufacturing technology. It includes a connecting base, an air knife assembly, an inner nozzle, an outer nozzle, a cooling jacket cover, and a cooling jacket tube. The outer nozzle includes a powder feeding body and a Laval tube. The Laval tube has diffusion holes inside. The Laval nozzle accelerates the airflow through a tapered-expanding structure, forming a high-speed, high-temperature jet environment. This ensures the powder is fully preheated and uniformly dispersed before reaching the substrate. Combining the Laval tube with laser spraying combines the advantages of laser cladding and thermal spraying technologies. The accelerated effect of the Laval airflow, under high temperature and high pressure, allows the powder to fully contact the laser heat source over a sufficiently long flight distance through the Laval nozzle. This enables the powder to form a metallurgical bond with the substrate in a molten state, achieving a bonding strength 2-3 times that of traditional thermal spraying. This method is suitable for confined spaces used in the protection and repair of turbine blades from water erosion.

A method includes receiving, by a computing device, a raw image indicative of a cross-section of a thermally-sprayed layer. The image includes a matrix of pixels, and each respective pixel in the matrix of pixels defines a luminance value. The method may further include determining, based on the luminance values, at least one pixel that corresponds to an oxide component in the layer and removing the at least one pixel that corresponds to the oxide component in the layer to generate a modified matrix of pixels. The method may further include generating an oxide-filtered image based on the modified matrix of pixels. The method may further include converting, by the computing device and based on the luminance values, the oxide-filtered image into a binary image and determining, by the computing device and based at least partially on the binary image, a porosity of the coating layer.

The invention relates to the technical field of metal material surface modification, in particular to AlCrCuMoNi high-entropy alloy powder with high temperature, wear resistance, corrosion resistance and good heat conduction, a coating and a preparation method thereof.The high-entropy alloy powder with the particle size being 15-45 microns and suitable for thermal spraying is prepared through a mechanical alloying method, and then the high-entropy alloy powder is prepared through an oxygen-kerosene supersonic flame spraying technology; the preparation method comprises the following steps: spraying high-entropy alloy powder on the surface of a key part matrix by taking high-entropy alloy as a matrix, oxygen as a combustion improver, kerosene as a fuel, high-purity nitrogen as a powder feeding carrier gas and air as a cooling medium to prepare an AlCrCuMoNi HEA coating; al, Cr, Cu, Mo and Ni elementary substance powder is subjected to ball milling according to the required molar ratio through a mechanical alloying method, AlCrCuMoNi HEA powder is obtained, the coating is prepared through the hypersonic flame spraying technology, the method is suitable for improving the high-temperature abrasion resistance and hot corrosion resistance of the surfaces of key parts in the industries of energy, metallurgy, chemical engineering and the like, and the service life of boiler pipes is prolonged.

This invention relates to a coating alloy, based on Iron Boride (Fe2B), a powder developed for bonding the surfaces of steels. Coatings made with the powder of this invention, using methods such as fusion or thermal spraying, provide an increase in surface hardness, wear resistance, and corrosion resistance of metallic materials, especially steels, and therefore represent a significant alternative to bonding through thermochemical methods. The alloy powder developed in this invention essentially contains iron (Fe) and boron (B) elements, with a boron (B) content between 7.1 % and 10% by weight.

This invention provides a carbon fiber reinforced polymer (CFRP) composite material that enhances the anchoring effect of the metal layer to the CFRP substrate and improves adhesion. [Solution] The CFRP composite material comprises a base material made of CFRP, a first metal layer laminated on the surface of the base material, and a second metal layer laminated on the surface of the first metal layer. The surface of the base material has carbon fiber cutting grooves formed to a depth in which the carbon fibers in the base material are actually cut, and the first metal penetrates into the grooves and is fixed therein. The manufacturing method includes (1) forming the cutting grooves, (2) laminating the first metal layer by thermal spraying (with penetration into the grooves), and (3) laminating the second metal layer by plating.

The invention relates to spherical high-entropy carbide powder and a preparation method of a SiC / high-entropy carbide coating. According to the method, normal-pressure carbon thermal reduction synthesis of high-entropy carbides is realized in a common box-type furnace and in an air atmosphere through a local atmosphere isolation structure of'laying graphite paper, upper graphite powder and covering activated carbon ', then a compact SiC transition layer is generated in situ on a substrate by utilizing a two-step method of'plasma spraying of a pure silicon layer and then high-temperature embedding carburization', and the high-entropy carbide is prepared. And finally, the high-entropy carbide coating is prepared through a thermal spraying method. The process is simple, the cost is low, large-scale preparation is easy, the high-temperature wear resistance and the ablation resistance of the coating can be remarkably improved, and the harsh requirements of the aerospace field and the like for the ultra-high-temperature protective coating are met.

The application belongs to the technical field of faucet valve processing, and particularly relates to a tungsten carbide processing technology for a faucet valve sealing structure. The tungsten carbide coating formed by the shielding part and the valve plug surface in one body during spraying causes damage to the coating on the valve plug surface when the shielding part is disassembled, and affects the spraying quality. The following scheme is proposed, including base pretreatment, complete cleaning of the spraying surface by using alkaline cleaning liquid + mechanical treatment to remove surface oil stains and keep the surface clean; the spraying surface needs to be preheated before sand blasting to remove surface moisture and improve the bonding quality of the powder and the surface of the part, and the suitable preheating temperature of the base surface is 60-90 DEG C. The tungsten carbide processing technology for the faucet valve sealing structure has the effect of guaranteeing the spraying quality of the tungsten carbide coating. When spraying, the device can separate the coating of the base passage area from the coating of other parts before the spraying of the tungsten carbide coating is completed, so that damage to the coating after the spraying is completed is avoided.

The application discloses a kind of plasma spraying self-reduction TiC / Ti composite coating and its preparation method and application, belong to thermal spraying coating field, TiC powder, deionized water and binder are mixed and stirred and ball milled, and TiC spherical powder is prepared by spray granulation;Using plasma spraying process, TiC spherical powder is sprayed on substrate, so that TiC occurs self-reduction reaction to generate Ti metal phase, and forms plasma spraying self-reduction TiC / Ti composite coating on substrate;In plasma spraying self-reduction TiC / Ti composite coating, Ti metal phase is distributed between TiC ceramic phase, and forms layered inlay structure.The application uses TiC powder as raw material, and generates Ti metal bonding phase in situ by adjusting and controlling plasma spraying process parameters during spraying process, avoids additional metal bonding phase and subsequent annealing treatment, simplifies process flow and reduces cost.The bonding strength of the prepared plasma spraying self-reduction TiC / Ti composite coating can reach 52.40 MPa at most, which significantly improves the problem of large brittleness and poor interface bonding of traditional TiC coating.

The invention relates to a working roll for rolling metal products, in particular for rolling metal strips, comprising: a metal matrix; and a wear-resistant protective layer at least partially arranged on the base body, the wear-resistant protective layer being a thermally sprayed protective layer; wherein the particle size of the wear-resistant protective layer is less than or equal to 50 m, preferably less than or equal to 45 m, particularly preferably less than or equal to 30 m or less than or equal to 20 m.

The application relates to a preparation method of a metal-based ceramic composite material and the metal-based ceramic composite material, and steps are as follows: 1. ceramic particle screening and pretreatment: screening and polishing are sequentially performed on the ceramic particles, and the Al2O3 and B4C powder mixture is uniformly sprayed on the surface of the polished ceramic particles in a thermal spraying mode; 2. ceramic preform preparation: after the pretreated ceramic particles, a bonding agent and a mixed powder are uniformly mixed, the mixture is filled into a mold, one-time solidification treatment is performed, a preliminarily formed ceramic preform is obtained, secondary solidification treatment is further performed, and the ceramic preform is obtained; 3. metal-based ceramic composite material pouring forming: the ceramic preform is placed in a casting cavity, metal liquid pouring is performed, and after cooling, the composite material is taken out; 4. heat treatment: the composite material is sequentially subjected to multi-stage normalizing heat treatment and tempering heat treatment, and the metal-based ceramic composite material is obtained. The application solves the problems of ceramic particle peeling and composite layer cracking of the existing composite material.

This invention discloses a composite thermal spray powder for wear-resistant coatings and its preparation method, relating to the field of thermal spray materials technology. The composite thermal spray powder for wear-resistant coatings comprises, by weight, the following components: 18-26 parts of a metal matrix material, 54-66 parts of a hard reinforcing phase, 8.5-12.5 parts of nano-Ti powder, 2.6-3.3 parts of a reactive carbon source, 0.8-1.5 parts of a buffer carbon source, 0.8-1.2 parts of a transient liquid phase additive, 1.5-2.5 parts of a lubricating functional component, and 0.5-1.5 parts of a modified coating material. The composite thermal spray powder for wear-resistant coatings provided by this invention has the following beneficial effects: precise and stable introduction of the reinforcing phase, and stable self-lubricating properties.

The invention relates to the field of corrosion protection of key parts of wind power generation equipment, in particular to a long-acting anti-corrosion coating process for a nodular cast iron fan hub and application of the long-acting anti-corrosion coating process. Through multi-stage cleaning and soluble salt control, special sand blasting treatment for a complex cavity and design of a composite coating system containing specific components of primer, elastic intermediate paint and shielding finish paint, the adhesive force, fatigue resistance and long-term protection performance of the coating under a dynamic load are remarkably improved by combining edge pre-coating and thermal spraying with accurate parameters, and the service life of the coating is prolonged. And high-reliability protection of the fan hub in the whole life cycle is achieved.

The invention belongs to the technical field of thermal spraying coating hole sealing, and discloses a hole sealing method based on the porosity of a thermal spraying coating, which comprises the following steps: forming a coating on the surface of a base material through a thermal spraying process, applying hole sealing glue on the surface of the coating, and forming a hole by utilizing the structural characteristic that open pores are communicated with one another. Enabling the hole sealing glue to naturally permeate into the coating under the action of gravity, enabling the hole sealing glue to at least permeate into the coating by 500 microns before curing by controlling the surface tension, viscosity and curing conditions of the hole sealing glue, and continuously filling holes; and then the coating is subjected to low-temperature curing treatment, so that the hole sealing glue forms a stable hole sealing structure in the holes. After the method disclosed by the invention is adopted, no less than 95% of open pores in the coating can be effectively sealed under the condition of not applying external pressure or vacuum assistance, so that the voltage resistance of the thermal spraying coating is stabilized at 500V or above, and the resistance value is improved from megohm level to gigaohm level, thereby obviously improving the electrical property and corrosion resistance of the coating.

The invention relates to the field of data management, in particular to a BRM business rule automatic reasoning method based on a knowledge graph. Comprising the following steps: obtaining a resource description framework triple based on a heterogeneous time series data stream containing a blade CNC machining log and thermal barrier coating process parameters, loading the triple into a graph database, and constructing a manufacturing knowledge graph data model; extracting historical time sequence data, and initializing a completely undirected graph; based on the process mechanism model and condition independence test, determining a data dependence path, and outputting a directed acyclic graph; performing analysis through intervention calculation, and calculating an average causal effect value; forming a causal knowledge graph by taking the average causal effect value as an attribute and the data dependence path as a relationship; and querying thermal spraying parameter nodes with average causal effect values exceeding a threshold value in the causal knowledge graph, and converting the thermal spraying parameter nodes into storage strategy rules. According to the method, the causal knowledge graph is converted into the storage strategy rule, so that automatic and closed-loop management from data acquisition to rule optimization is realized.

The application relates to a kind of anticorrosion hot spraying machine for metal surface treatment, belong to thermal spraying technical field, the present application includes mounting plate and side plate, the top of mounting plate is equipped with guide slot, and the inner wall of guide slot is slidably connected with sliding frame, the inner wall of sliding frame is provided with protection mechanism, the bottom of drive assembly is provided with another protection mechanism, to adapt to different diameter size metal workpiece when carrying out thermal spraying, avoid the influence of splashed coating to the area that has completed thermal spraying, by making the first sliding block retract after the movement of spraying gun is completed and gap is generated between workpiece, thereby adapt to different diameter size metal workpiece, when the workpiece surface is subsequently sprayed by spraying gun, splashed coating is effectively blocked by the aid of baffle, can accurately avoid splashed coating to the area that has completed thermal spraying to cause interference, thereby ensure the quality of thermal spraying processing, thereby improve the practicability of device, provide stability for subsequent thermal spraying processing.

This utility model belongs to the field of shielded pumps and relates to a coreless magnetic steel rotor for the axial magnetic field of a permanent magnet shielded pump. It includes: a rotating shaft, with a front ceramic layer and a rear ceramic layer formed by thermal spraying ceramic layers onto the front and rear middle sections of the shaft; an impeller mounted on one end of the rotating shaft; a ceramic ball bearing and a bearing pressure ring mounted on the other end of the rotating shaft; and a coreless magnetic steel rotor mounted on the rotating shaft. The advantages of this structure are: using a stainless steel shaft with thermally sprayed ceramic layers on the bearing positions effectively prevents and eliminates the drawbacks of traditional water bearings, such as short lifespan and easy wear, and ceramic shaft breakage due to overload impact from the medium.

The invention discloses a production process of a fully-coated wire mesh for a water electrolysis hydrogen electrode, and relates to the technical field of manufacturing of wire meshes for water electrolysis hydrogen electrodes, and the production process comprises the following steps: S1, providing a wire mesh, hydrosol, sand grains and aluminum-containing nickel-based alloy powder; s2, mixing hydrosol and sand grains to form a gel-sand mixture, coating the surface of the metal wire mesh with the gel-sand mixture, blocking meshes of the metal wire mesh, and performing drying and curing; s3, sand blasting or polishing treatment is carried out, the metal surface is exposed, and aluminum-containing nickel-based alloy powder is sprayed to the surface of the metal wire mesh through a thermal spraying technology; s4, the metal wire mesh is immersed in water, hydrosol is dissolved, sand grains fall off, drying and curing are conducted after washing, and then the metal wire mesh is immersed in alkali liquor to dissolve aluminum in the coating; and S5, sintering the metal wire mesh to obtain the metal wire mesh. The porous coating can be fully covered on the silk screen holes, and the contact area of the thermal spraying silk screen and electrolyzed water is obviously increased, so that the catalytic effect and the productivity of hydrogen production through water electrolysis are obviously improved.

The present disclosure provides a thermal barrier coating powder and a preparation method thereof, and a thermal barrier coating, and relates to the technical field of high-temperature protective coating materials. The method comprises: performing mechanical-chemical grinding and surface hydroxylation treatment on a MAX phase powder; dispersing an activated MAX phase core in a liquid phase, uniformly coating a YSZ precursor on the surface of the core through double titration co-precipitation to obtain a core-shell structure precursor slurry; performing microwave hydrothermal treatment to in-situ crystallize the YSZ precursor to form a YSZ shell layer on the surface of the MAX phase core, thereby obtaining a core-shell structure unit; the core-shell structure unit has a core-shell structure composed of a MAX phase core and a YSZ shell; performing post-treatment and spray drying on the core-shell structure unit to obtain a thermal barrier coating powder; and the powder is obtained by agglomeration of multiple core-shell structure units. The interface between the core and the shell of the powder obtained by the method is firmly combined, can provide oxidation protection for the inner core of the MAX phase in coating preparation processes such as thermal spraying, and significantly improves the fracture toughness and thermal shock resistance of the thermal barrier coating.

This invention relates to a method for controlling the deformation of thin-walled, weakly rigid parts manufactured by additive manufacturing during thermal spraying. Belonging to the field of thermal spraying technology, it solves the technical problem of deformation occurring during the thermal spraying coating preparation process of thin-walled, weakly rigid parts with large residual stress, affecting assembly. The method for controlling the deformation of thin-walled, weakly rigid parts manufactured by additive manufacturing during thermal spraying includes the following steps: S1, detecting and processing the residual stress of the part; S2, designing and processing a thermal spraying shaping fixture; S3, assembling the fixture and part and then sandblasting; S4, performing stress-relief annealing on the part; S5, performing vibration aging stress relief on the part; S6, conducting a second residual stress detection and data processing on the part, and then calculating the residual stress change rate; S7, assembling the fixture and part and then performing plasma spraying; and S8, post-treatment after plasma spraying. This invention improves the surface accuracy of the part after plasma spraying and avoids assembly step differences.

This invention relates to a graphene / WC-10Co-4Cr core-shell spherical powder, a thermal spray coating, and a method for preparing the same, belonging to the technical field of thermal spray wear-resistant coatings. The graphene / WC-10Co-4Cr core-shell spherical powder comprises WC-10Co-4Cr spherical powder and graphene powder coating the surface of the WC-10Co-4Cr spherical powder; the graphene content in the core-shell spherical powder is 1.5~2.5 wt%. The core-shell spherical powder of this invention uses WC-10Co-4Cr spherical powder as the core and graphene powder as the shell. The coating obtained using this core-shell spherical powder exhibits excellent wear resistance and low visible light reflectivity, effectively overcoming the problem of severe surface reflection in existing WC-10Co-4Cr coatings.

The present application relates to a kind of corrosion and wear resistant thermal spraying nickel-based composite non-slip coating and its preparation method, belong to non-slip coating technical field.It includes alloy steel matrix, corrosion-resistant bottom layer and non-slip surface layer from bottom to top sequentially arranged;Wherein, the corrosion-resistant bottom layer is nickel-based superalloy, and the thickness of corrosion-resistant bottom layer is 50-200 μm;The non-slip surface layer is composed of the same nickel-based superalloy as corrosion-resistant bottom layer, nano alumina particles and micron alumina particles, and the thickness of non-slip surface layer is 300-600 μm.Using plasma enhanced high-speed arc spray technology realizes the high efficiency, high quality preparation of alloy bottom layer and metal / ceramic surface layer, and the obtained nickel-based composite non-slip coating has excellent properties such as non-slip, wear resistance and corrosion resistance, which can effectively improve the deck surface performance and service life of various large marine engineering equipment.

This invention discloses a high-performance Co-based high-entropy alloy / WC / NbC ceramic composite powder, coating, and preparation method thereof, all prepared by laser cladding. The composite powder is primarily composed of a Co-based high-entropy alloy, with the following atomic percentage composition: Co powder: balance; Cr powder: 25-35%; Ni powder: 7-13%; Al powder: 5-8%; Ti powder: 5-8%; Nb powder: 0.5-5%. WC powder: 5-25 wt% and NbC powder: 1-10 wt% are added to this formulation. Using this powder as raw material, laser cladding is applied to the surface of a water turbine workpiece to form a coating of 0.5-10 mm. This coating exhibits a metallurgical bond with the substrate and possesses excellent resistance to abrasion, cavitation erosion, and corrosion. This invention has high production efficiency, higher coating adhesion compared to supersonic thermal spraying technology, and is a metallurgical bonding process, making it more suitable for construction in small spaces. It can produce thicker coatings, and the laser cladding coating is denser, without through holes, preventing corrosion channels and making it more corrosion resistant. It is used to solve the problems of abrasion, cavitation and corrosion on the surface of water turbines.