129 results about "Thermal spraying" patented technology

The invention discloses a novel laser thermal spraying gun, and belongs to the technical field of laser additive manufacturing, the novel laser thermal spraying gun comprises a connecting seat, an air knife assembly, an inner nozzle, an outer nozzle, a cooling sleeve cover plate and a cooling sleeve, the outer nozzle comprises a powder feeding body and a Laval pipe, and a diffusion hole is formed in the Laval pipe; the Rafael nozzle accelerates air flow through a gradually-shrinking-gradually-expanding structure, a high-speed and high-temperature jet flow environment is formed, powder is fully preheated and evenly dispersed before reaching a base body, the Rafael pipe and laser spraying are combined, the advantages of the laser cladding technology and the thermal spraying technology are combined, the acceleration effect of Rafael air flow is overlaid, and the thermal spraying effect of the laser cladding technology and the thermal spraying technology is improved. Under the action of high-temperature and high-pressure air flow, the powder is in full contact with a laser heat source in a flying distance long enough through a Laval nozzle, so that the powder and a matrix form metallurgical bonding in a molten state, the bonding strength can be 2-3 times that of traditional thermal spraying, and the powder is suitable for the limited space environment of water erosion protection and repair of the steam turbine blade.

The invention relates to the technical field of plasma thermal spraying processing, in particular to an automatic thermal spraying robot for die-casting die maintenance, which comprises a bottom frame, a driving component, a driven screw rod, a moving component, a spray gun, an adjusting block, an adjusting component, a synchronous block, a synchronous component, a cooling system and a re-spraying positioning component, spiral spraying of the die-casting die is achieved in the mode that rotation of the die-casting die is combined with movement of the spraying gun, the adjusting component and the transmission are arranged, the spraying distance of the spraying gun to the die-casting die can be adjusted, meanwhile, the movement speed of the spraying gun can be synchronously adjusted, and cooling can be stopped at any time by arranging the cooling system and the re-spraying positioning component; and after cooling, it is guaranteed that the spray gun can be aligned to the position of the die-casting die before cooling, the quality of plasma thermal spraying is guaranteed, the maintenance effect of the die-casting die is improved, and then the quality of non-ferrous metal parts produced by the die-casting die is improved.

The application is a preparation method of in-situ synthesis of ODS multi-principal element alloy powder. The method uses in-situ oxidation in the thermal spraying process and selective oxidation of Al or Cr in the alloy powder to introduce nano-oxides, and realizes uniform distribution of the nano-oxides in the alloy powder by high-speed impact and spatter of the powder at the liquid surface in the spraying process. After the spraying is completed, the alloy powder is rapidly cooled in the cooling liquid and still maintains the spherical shape. The ODS alloy powder prepared by the application has the advantages of uniform distribution of oxide particles in the powder and high powdering efficiency, and the microstructure of the ODS alloy powder can be controlled by adjusting the composition ratio of the raw material powder and the spraying process.

The utility model belongs to the technical field of furnace roller thermal spraying, and particularly relates to a furnace roller thermal spraying clamping tool which comprises a working table, a mounting plate is mounted at the top of the working table, a supporting column is fixedly mounted at the top of the mounting plate, a lower arc plate is fixedly mounted at the top of the supporting column, an upper arc plate is hinged to the top of the lower arc plate, and the upper arc plate is hinged to the top of the upper arc plate. According to the furnace roller cleaning device, the upper arc plate which is opened and closed is closed to the top of the lower arc plate, then a threaded column is rotated, so that an arc-shaped abutting plate is attached to the outer surface of the furnace roller, the heating wire on the inner wall of the lower arc plate is powered on, the friction assembly is installed in the upper arc plate, and the friction assembly is used for conducting friction cleaning on the outer surface of the furnace roller. The outer surface of the furnace tube is preheated, and the arc-shaped abutting plates rub and clean the outer surface of the furnace roller, so that the effect of preheating and cleaning the outer surface of the furnace roller is achieved.

The invention discloses an automatic placing and conveying control method for a reinforcing steel bar thermal spraying production line, relates to the technical field of production control, and aims to solve the problem of low production efficiency. The method comprises the following steps: dividing a steel bar into a plurality of sections, marking smoke sensors distributed in each section, when the steel bar to be sprayed enters a spraying operation area, collecting smoke concentration data of each marked smoke sensor, analyzing the smoke distribution state of each divided section, and evaluating section spraying quality-effect characteristics in combination with spraying flow data of a spray gun; whether the conveying distance of the current to-be-sprayed reinforcing steel bar needs to be adjusted or not is judged, the duty ratio coefficient of the spray gun and the reinforcing steel bar placing jitter data before the conveying distance is adjusted are collected, calculated and fused to obtain reinforcing steel bar conveying characteristics, the conveying distance is corrected according to the reinforcing steel bar conveying characteristics, and the adjusting effect is further verified based on the smoke concentration peak value; and the environment stability of the spraying area and the consistent spraying quality are ensured.

The invention relates to the technical field of sucker rod production, and discloses a sucker rod anticorrosive coating spraying device which comprises an air duct surrounding a sucker rod in a clearance mode and allowing the sucker rod to penetrate through, thermal spraying gun heads spraying the sucker rod symmetrically penetrate through the two side walls of the air duct, and airflow output assemblies penetrate through the upper wall and the lower wall of the air duct. Each airflow output assembly comprises a first air inlet pipe penetrating through the wall of the air duct and an air distribution box connected to the inner end of the first air inlet pipe, the air outlet direction of the air distribution box is vertical and corresponds to the two sides of the sucker rod, and the four airflow output assemblies are vertically symmetrical; the airflow output assembly outputs airflow, so that the moving paths of the thermal spraying materials at the upper and lower ends are bent towards the sucker rod and are respectively attached to the upper and lower sides of the sucker rod; the double-side thermal spraying gun heads are used for oppositely spraying the two sides of the sucker rod which linearly penetrates through the double-side thermal spraying gun heads, and the airflow output assembly is used for changing spraying material spraying paths on the edges of the upper end and the lower end, so that originally lost spraying materials are focused on the upper side and the lower side of the sucker rod, and the utilization rate of the spraying materials is increased.

The invention discloses a lap joint tailor-welding structure of an automobile integrated door ring and a manufacturing method, and belongs to the technical field of tailor-welding of automobile spare parts, and the automobile integrated door ring is prepared through an integrated process of heating stamping and in-mold quenching after a composite coating is thermally sprayed on the surface of thermal forming steel. The composite coating comprises the following chemical components in percentage by weight: 3%-8% of Y2O3, 5%-15% of TiN, 2%-6% of HfO2, 20%-35% of Al, 5%-12% of Si and the balance of Fe and inevitable impurities. By means of the mode, the welding strength is effectively improved through the innovative tailor-welding process of the composite coating plate and lap resistance spot welding.

The present application discloses an abrasion-resistant non-stick cookware and a manufacturing method thereof, belonging to the technical field of kitchenware. The abrasion-resistant non-stick cookware includes a cookware substrate, and a composite thermal spraying layer is formed and adhered on the inner surface of the cookware substrate, and a non-stick layer is formed and adhered on the surface of the composite thermal spraying layer; the composite thermal spraying layer is attached to the surface of the cookware substrate by plasma thermal spraying process with composite particles, and the composite particles include metal particles and wear-resistant particles. The wear-resistant particles can reduce the porosity of the composite thermal spraying layer, improve the bonding force between the composite thermal spraying layer and the cookware substrate and the non-stick layer, and enhance the wear resistance and corrosion resistance of the composite thermal spraying layer, thereby prolonging the service life of the non-stick cookware.

The invention provides a low-temperature plasma spraying method for a heat-sensitive polymer matrix and a composite material, and belongs to the technical field of surface engineering. According to the method, through a system process of matrix surface pretreatment, spraying powder drying and low-temperature plasma spraying, the core is that a matrix active cooling technology is adopted in the range of 0-10 DEG C to isolate the plasma arc heat influence, and optimized sand blasting coarsening, powder granularity control and spraying process parameters are matched; and the compact Al2O3-TiO2 ceramic coating with high bonding strength is successfully prepared on a heat-sensitive epoxy resin matrix. The limitation that a traditional thermal spraying technology cannot be used for high polymer materials is broken through, the technological process is simple, the cost is low, and the obtained coating is excellent in abrasion resistance and suitable for meeting the requirement for high performance of the surface of the light high polymer material in the fields of electronic equipment, aerospace and the like.

This invention provides a multi-metal co-doped WC-Co coating and its preparation method, belonging to the field of metal-ceramic coating technology. The preparation method includes: weighing tungsten, yttrium, cerium, chromium, and vanadium sources, mixing and dissolving them in deionized water, adjusting the pH to 3-4, and obtaining a precursor through co-precipitation, washing, and drying; subjecting the precursor to sequential aerobic calcination, hydrogen reduction, and carbonization treatments to generate a WC phase, resulting in a rare-earth-transition multi-metal co-doped WC-based composite material; using the WC-based composite material, cobalt powder, and additives as raw materials, spraying the raw materials onto the substrate surface via thermal spraying to form a multi-metal co-doped WC-Co coating. The WC-Co coating prepared by this invention incorporates four elements—yttrium, cerium, chromium, and vanadium—forming a multiple synergistic mechanism of grain refinement, interface strengthening, and decarburization inhibition, effectively improving the hardness, wear resistance, corrosion resistance, and toughness of the WC-Co coating.

This invention relates to a method for preparing a self-purifying stepped ring packing, belonging to the field of water pollution purification materials. The method comprises the following steps: after acid washing and activation of ceramic stepped rings, a neodymium-niobium-zinc precursor is sprayed onto the surface of the ceramic stepped rings using a thermal spraying method. A series of drying and calcination processes are then performed to coat the surface of the ceramic stepped rings with a neodymium-niobium-zinc composite oxide active coating. The coating accounts for 3.6% to 3.9% of the total mass of the self-purifying stepped ring packing and exhibits high activity in decomposing organic pollutants. This packing can stably remove organic pollutants from wastewater over a long period, requiring minimal maintenance and regeneration during use, and has broad application prospects in practical wastewater treatment.

In a method for forming an abradable material (36), the abradable material has at least 20% by volume rutile titania (44) and hBN (46). The method includes: blending a first titania powder having an oxygen debit of at least 5.0% with a second titania powder having an oxygen debit, if any, of less than 1.0%. The blend is thermal sprayed. The sprayed blend is then oxidized.

The present invention relates to the technical field of plasma thermal spraying, and discloses a plasma thermal spraying device for an anti-sticking and wear-resistant coating, including a workbench. A track is fixedly connected to the top of the workbench. A first chute is opened at the top of the track, and the first chute penetrates through the track and extends to the bottom of the workbench. A second chute is opened at the top of the workbench. A first connecting plate is fixedly connected to the bottom of the workbench. A threaded column is rotatably connected to the inner wall of the workbench through a bearing. The rotation of the threaded column is driven by a first motor to control the movement of the placement assembly. The end of the threaded column away from the workbench is rotatably connected to the first connecting plate through a bearing. By setting a rotating assembly, the spray head in the device is extended into the hollow material. Through the rotation of the spray head and the movement of the placement mechanism, the spraying operation inside the hollow material is facilitated, without the need for redundant settings, simplifying the operation process and improving work efficiency.

This invention discloses a chromium oxide-based coating, its preparation method, and its application. The preparation method of the chromium oxide-based coating of this invention includes the following steps: 1) dispersing ceramic particles and / or metal particles, chromium oxide particles, and a binder in water, wherein the particle size of the ceramic and metal particles is smaller than that of the chromium oxide particles, followed by spray drying to obtain composite particles; 2) thermally spraying the composite particles onto the surface of a substrate to obtain the chromium oxide-based coating. The chromium oxide-based coating of this invention possesses both high hardness and excellent toughness, exhibiting superior resistance to friction and wear, and can be used as a wear-resistant coating for the surface of metal parts, making it suitable for large-scale industrial applications.

The utility model discloses thermal spraying equipment for converting edible mushroom waste residues into feed grains, which relates to the technical field of edible mushroom waste residue treatment and comprises a thermal spraying tank, the thermal spraying tank comprises a tank body, a steam spraying pipe arranged in the tank body and a first steam inlet pipe, one end of the first steam inlet pipe extends into the tank body, and a feeding port is arranged at the top of the tank body. The bottom of the tank body is provided with a feed port, the bottom of the tank body is provided with a discharge port, the tank body is provided with a feed valve at the feed port, the tank body is provided with a discharge valve at the discharge port, the pipe wall of the first steam spray pipe is provided with steam spray holes, and a dust cover covers the steam spray holes. When granular powdery edible mushroom waste residues are added into the tank body through the feeding funnel, the edible mushroom waste residues can slide down along the inclined surface on the dust cover under the action of the umbrella-shaped dust cover, so that the edible mushroom waste residues cannot enter the steam spraying pipe to block the steam spraying holes or the steam spraying pipe, and the steam spraying pipe and the steam spraying holes are ensured to be smooth; and the steam is smoothly sprayed into the tank body through the steam spraying holes.

The present invention discloses a method for preparing a composite aluminum film. The method comprises first sandblasting a substrate surface; then spraying a 10-50 μm thick aluminum layer onto the substrate surface using a subsonic flame spraying technique; etching the aluminum layer prepared by thermal spraying in an acid solution to obtain a 4-8 μm aluminum layer; and then transferring the acid-etched aluminum layer to a polymer base film using a transfer technique to obtain the composite aluminum film. The method for preparing the aluminum film has high process controllability, a wide range of thickness selectivity, and excellent performance, thus having broad application prospects.

This invention discloses a high-thickness, high-purity MAX phase coating and its preparation method. The method includes: 1. Mixing a metal oxide and a carbon source, followed by high-energy ball milling and spray granulation to prepare spherical precursor powder; 2. Depositing a transition layer on a sandblasted substrate surface using plasma spraying, and then depositing the spherical precursor powder on the transition layer to form a precursor coating; 3. Immersing the substrate with the precursor coating in molten salt for electrolysis, causing the precursor coating to be electro-deoxidized and converted into a MAX phase coating. This invention employs a synergistic process of "plasma spraying-molten salt electrochemical conversion," converting the sprayed precursor coating into a MAX phase coating through in-situ electro-deoxidation in molten salt electrochemistry. This process has high deposition efficiency and avoids the defects of carbon loss, phase decomposition, and oxidation in the coating product when directly thermally spraying MAX materials. It achieves the preparation of a high-thickness, high-purity MAX phase coating, suitable for the field of surface protection.

The plasma torch according to the present invention rotates the generated plasma P along the central axis T and ejects it in the axial direction, and also causes the plasma P to melt the powder of the thermal spray material and discharge it to the outside from the front nozzle opening. The current vector and the magnetic flux vector are orthogonal. A vector of current flowing between the first discharge surface 39 of the cathode 36 and the second discharge surface 49 of the second electrode 41 in order to generate plasma P, and a vector of magnetic flux of a magnetic field synthesized by the first magnet 37, the second magnet 42, the third magnet M3, and the fourth magnet M4, are orthogonal.

The invention belongs to the technical field of plasma thermal spraying, and discloses a preparation method and application of niobium powder for plasma thermal spraying, and the preparation method of the niobium powder comprises the following steps: S1, primary sintering: uniformly mixing niobium oxide and niobium carbide, then carrying out compression molding, and carrying out primary vacuum reduction sintering to obtain hydrogenated primary niobium; the primary sintering is segmented sintering: in the first stage, the sintering temperature is 1100-1200 DEG C; in the second stage, the sintering temperature is 1500-1600 DEG C; in the third stage, the sintering temperature is 1900-2000 DEG C; s2, primary niobium powder is prepared; s3, secondary sintering: firstly, uniformly mixing the primary niobium powder with a forming agent, then carrying out compression molding, and carrying out secondary vacuum sintering at the sintering temperature of 1900-2100 DEG C to obtain hydrogenated secondary niobium; and then, the hydrogenated secondary niobium is sieved and dehydrogenated to obtain niobium powder. The niobium powder preparation method has the advantages of being simple in technological process, high in production efficiency, low in energy consumption, small in pollution and the like, and the prepared niobium powder is uniform in particle size and low in oxygen content and completely meets the use requirement of thermal spraying.

This invention discloses a preparation process for high-carbon ferrochrome based on plasma spheroidization technology, belonging to the field of powder metallurgy. The process involves crushing and ball milling high-carbon ferrochrome blocks to obtain pre-formed powder, adding tannic acid, urea, nickel acetate tetrahydrate, and citric acid for coating, followed by spray drying. After pre-reduction carbonization in an argon-hydrogen atmosphere, the powder is then spheroidized using a radio frequency inductively coupled plasma torch. In-situ nanostructure growth is achieved in a mixed atmosphere of argon, hydrogen, and acetylene. Nickel acetate is reduced to catalytically active elemental nickel nanoparticles under the action of hydrogen and carbon monoxide. The powder is then cooled, graded, and inertly encapsulated to obtain a high-sphericity, low-oxygen-content, high-carbon ferrochrome-based core-shell structured spherical powder. The process flow of this invention is continuous and controllable, effectively improving powder flowability, bulk density, hardness, and corrosion resistance, and is applicable to additive manufacturing, thermal spraying, and powder metallurgy forming.

The invention relates to a cathode part for a device for thermal spraying, in particular for atmospheric plasma spraying and / or protective gas plasma spraying and / or vacuum plasma spraying, with a base body having a longitudinal axis, with a powder channel extending along the longitudinal axis for guiding powder particles from an input side of the cathode part to an output side of the cathode part through the cathode part.

This application relates to the technical field of ceramic materials, and particularly to a preparation method for producing yttrium oxide spraying powder by hydrothermal method, which comprises the following steps: preparing slurry by adding water to yttrium hydroxide - hydrothermal treatment - calcination - grinding - modification - granulation - degumming - screening - impurity removal; the preparation method for producing yttrium oxide spraying powder by hydrothermal method in this application enables yttrium hydroxide to form an effective crystallization mechanism through specific hydrothermal treatment and specific surface modification, so that the yttrium oxide slurry has good suspension property, the compacted density of the powder after granulation is large, the strength is high, it is not easy to break, and the use effect is good; the spraying powder with good crystal lattice has a white coating appearance under the thermal spraying process, high bonding strength with the substrate, and low cost.

The invention relates to the technical field of thermal spraying materials, in particular to a preparation method and application of high-density yttrium-aluminum composite spraying granulation powder. The preparation method comprises the following steps: dissolving Y (NO3) 3.6 H2O and boehmite powder in deionized water to obtain a clear solution; under vigorous stirring, dropwise adding a precipitant into the clear solution, then adding urea, uniformly mixing, heating and continuously stirring until the reaction is complete and the solution becomes turbid; standing, collecting precipitate, washing and drying to obtain precursor powder; calcining the dried precursor powder in a high-temperature furnace to obtain YAG mixed powder; pouring the YAG mixed powder, a binder and an antioxidant into pure water, stirring, and carrying out ball milling to form composite slurry; performing spray granulation on the composite slurry to obtain spherical granulation powder; the uniform distribution of yttrium in the obtained granulated powder and the synergistic effect of BN remarkably improve the oxidation resistance and high-temperature stability of the coating; splashing and pores in the spraying process are reduced through the spherical particles, and the compactness of the coating is improved.

The utility model provides a thermal zinc spraying device. The thermal zinc spraying device comprises a first fixing frame, a second fixing frame and a third fixing frame, the first mounting assembly is arranged on the first fixing frame in a sliding manner; the second mounting assembly is arranged at the end, away from the first mounting assembly, of the first fixing frame in a sliding mode, and the first mounting assembly and the second mounting assembly are oppositely arranged; the bar is rotationally connected with the first mounting assembly and the second mounting assembly; the second fixing frame is arranged on one side close to the first fixing frame; and the zinc spraying assembly is arranged on the second fixing frame in a sliding mode, and the zinc spraying assembly is used for spraying zinc to the bar. The hot zinc spraying device enables hot zinc spraying of bars to be more convenient and faster.

The application relates to the technical field of surface strengthening treatment, in particular to a surface strengthening treatment equipment and process for a laser cutting machine bed, which comprises a plasma spraying device and two electric sliding tables fixedly installed at one end of the plasma spraying device, a side plugging mechanism and a plurality of uniformly distributed plugging strips are arranged on the side, away from the plasma spraying device, of the mounting seat, an unlocking mechanism is arranged in the mounting seat, an upper plugging plate is movably arranged in the mounting seat, and a fixing mechanism is arranged at the two ends of the support. The surface strengthening treatment of the linear guide rail sliding block can adopt the process of plasma spraying and thermal spraying powder and wire material, the linear guide rail sliding block is automatically shielded by the mutual cooperation between the upper plugging plate, the side plugging plate, the plurality of plugging strips and the mounting seat in the device, and the ball circulating track, the sealing groove, the end cover interface and the threaded hole at the top of the linear guide rail sliding block are automatically shielded.

To provide an electric heating carrier capable of intending longevity of a flame spray fixed layer, by suppressing deviation of long life of a flame spray fixed layer.SOLUTION: An electric heating carrier according to the present invention includes a pair of metal electrodes 2 for applying a voltage to the honeycomb structure connected to the electrode layer 11. Each of the pair of metal electrodes 2 has a base 20 and a comb-shaped connecting portion 21 with a plurality of teeth 22. The plurality of teeth 22 include proximal connecting teeth 220p, 221p connected to the electrode layer 11 at a first position, and distal connecting teeth 220d, 221d connected to the electrode layer 11 at a second position. The electrodes are formed such that the difference in current flowing through each of the plurality of teeth 22 is reduced compared to the case where the electrical resistance of each of the plurality of proximal connecting teeth 220p, 221p is equal to each other and the electrical resistance of each of the plurality of distal connecting teeth 220d, 221d is equal to each other.SELECTED DRAWING: Figure 2

The invention relates to a blood pump with a microstructure super-hydrophobic surface, which comprises a blade and a super-hydrophobic coating coated on the surface of the blade, and a micron-sized periodic pit array is etched on the surface of the blade through a femtosecond laser texturing technology to form a microstructure. A micron-sized periodic pit array is etched on an interface, in contact with blood, of a blood pump through a femtosecond laser texturing technology, so that a bionic micro-nano composite structure is formed; and a super-hydrophobic functional layer is constructed on the surface of the microstructure by further adopting a multi-scale coating technology (including but not limited to a plasma enhanced chemical vapor deposition method, a high-speed oxygen fuel thermal spraying method, a photoetching template guided self-assembly method and a directional electrostatic spinning method). Zero damage of blood cells under the dynamic shearing condition can be achieved, meanwhile, platelet adhesion and blood coagulation factor activation are effectively inhibited, and a breakthrough solution is provided for solving related complications of artificial heart clinical application.

The invention discloses a passivation solution, a preparation method of the passivation solution and a construction process of a metal composite coating, and aims to solve the problem of effective passivation treatment on the surface of an exposed steel substrate after thermal spraying of an anode metal coating. Aiming at the problem of bimetal primary battery effect occurring in the passivation stage of a thermal spraying anode metal coating simultaneously existing on a steel substrate and the surface of the steel substrate, the passivation solution comprehensively utilizes the film-forming properties of phytic acid, silane and polyaniline, is supplemented with a metal accelerant, an oxidizing agent and titanium salt, and optimizes the pH value of the passivation solution to be faintly acid of 5-6; the thermal spraying anode metal coating is protected to the maximum extent, meanwhile, the passivation effect on an exposed steel base body is effectively achieved, the corrosion resistance of the exposed metal base body under the thermal spraying anode metal composite coating is achieved, and therefore the long-acting protection life of the thermal spraying anode metal composite coating is greatly prolonged.

The invention discloses thermal barrier coating powder with a micro-explosion effect and an efficient evaporation agglomeration structure and a preparation method of the thermal barrier coating powder, and belongs to the technical field of thermal spraying materials. The thermal barrier coating powder is powder with an agglomeration structure and is formed by uniformly mixing and agglomerating hollow polymer microspheres and nano ceramic particles through an organic binder; the hollow polymer microspheres comprise one or more of polymethyl methacrylate, polyethylene, polystyrene, polylactic acid, polyacrylic acid, polyvinyl butyral, polyisobutene, polycarbonate and polyethylene glycol terephthalate; the nano ceramic particles comprise one of yttrium oxide stabilized zirconium oxide, rare earth zirconate, multi-element rare earth doped zirconate, rare earth tantalate and oxide. The method is used for solving the technical problem that in an existing PS-PVD process, part of powder is only melted in plasma jet and is not fully gasified, so that a lamellar structure where melted particles are accumulated is formed in a coating, and an ideal vapor deposition columnar crystal structure is not formed.

The utility model discloses an electric arc spraying machine, and relates to the technical field of thermal spraying. The device comprises a shell, an air inducing bin is formed in the shell, a conical exhaust outlet communicating with the air inducing bin is formed in one end of the shell, one end of the shell is in threaded connection with an air guiding pipe communicating with the air inducing bin, mounting bins communicating with the air inducing bin are symmetrically formed in one end of the shell, and mounting rollers are rotationally connected to the interiors of the mounting bins; and a metal wire coil fixedly sleeves one end of the metal wire coil. Positive and negative currents are provided for the two metal wire coils through the electrodes correspondingly, so that the two metal wire coils form a short circuit, high-temperature melting is generated, meanwhile, air blows molten metal liquid of the metal wire coils to be sprayed to the surface of a workpiece, and meanwhile the flow dividing plate is used in cooperation with the air guiding opening and the air guiding plate; part of air guided into the air inducing bin through the air guiding pipe is sprayed to the surfaces of the heat dissipation fins, and therefore heat exchange cooling is achieved through the air and the heat dissipation fins.