CN111575633A - Preparation method of fretting wear resistant alloy coating - Google Patents
Preparation method of fretting wear resistant alloy coating Download PDFInfo
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- CN111575633A CN111575633A CN202010441904.3A CN202010441904A CN111575633A CN 111575633 A CN111575633 A CN 111575633A CN 202010441904 A CN202010441904 A CN 202010441904A CN 111575633 A CN111575633 A CN 111575633A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/134—Plasma spraying
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/02—Pretreatment of the material to be coated, e.g. for coating on selected surface areas
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/06—Metallic material
- C23C4/08—Metallic material containing only metal elements
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/12—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the method of spraying
- C23C4/129—Flame spraying
Abstract
The invention relates to the technical field of thermal spraying materials and coatings, in particular to a preparation method of an anti-fretting wear alloy coating, which comprises the following steps: (1) pretreating a workpiece to be sprayed; (2) and spraying the micro-motion abrasion resistant alloy coating on the pretreated workpiece by adopting a plasma arc powder spraying process. The spraying angle is 90 degrees; the arc voltage is 60-62V; the power is 30-31 kW; the spraying distance is 62-64 mm; controlling the powder feeding amount to be 35-45 g/min; the spraying moving speed of the spray gun is controlled at 600 mm/s. The process method and parameters, the anti-oxidation and cooling mist-discharging method, the rapid and reliable protection and shielding protective tool and the robot precisely control the motion of the spray gun, so that the obtained coating has an ideal coating structure, extremely low oxide inclusion and coating bonding strength greatly higher than index requirements, meets the required porosity and coating hardness, and meets the required and controllable coating thickness and precision.
Description
Technical Field
The invention relates to the technical field of thermal spraying materials and coatings, in particular to a preparation method of an anti-fretting wear alloy coating.
Background
The working conditions of the blades of fans, compressor blades, turbine blades and the like of aeroengines, ground gas turbines and the like are very complex, the blades need to bear the combined action of mechanical, thermal and pneumatic loads, and the blade root parts of the blades have huge potential safety hazards in the working process if the surface treatment is not carried out, so that the damage accidents of the compressor impeller are easy to happen. Therefore, after the workpiece is finished and finished, the surface of the blade root of the blade needs to be coated with the fretting wear resistant alloy coating, so that the coating process of the fretting wear resistant alloy coating cannot cause damages such as splashing, clamping damage or collision on the surfaces of other parts finished and finished with finish machining.
The surface coating of the blade root of the existing blade mostly adopts an anti-fretting wear alloy material, (1) the material mainly adopts copper-nickel-indium alloy, and the components of the material are Ni: 36%, In: 5%, Cu: and (4) the balance. Melting temperature: 1150 ℃. The copper-nickel-indium alloy has special physical and chemical properties: (1) the main component copper has fast heat conduction and heat dissipation and is easy to overheat and burn; (2) copper is extremely easy to oxidize and vaporize, a large amount of dark brown copper oxidation aerial fog is generated in the plasma arc heating process, the copper oxidation aerial fog covers the surface of a coating layer or is included between the interfaces of coating layer molten drops, the molten drops cannot be fused and adhered ideally, the bonding strength between layers and a matrix of the coating layer is seriously deteriorated, and the physicochemical property of the coating layer is also seriously damaged due to the existence of excessive oxide particles. The characteristics lead the technological characteristics of the copper-nickel-indium alloy and other alloy materials to be completely different in the plasma arc spraying process, the compatibility is poor, and the satisfactory fretting wear resistant alloy coating quality is difficult to obtain.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provides a preparation method of an anti-fretting wear alloy coating, which can be used for spraying blade root parts of blades such as fans, compressor blades, turbine blades and the like of aircraft engines, ground gas turbines and the like, effectively avoids other parts from being damaged, is easy to control process parameters and is easy to realize industrialization.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation method of an anti-fretting wear alloy coating comprises the following steps:
(1) carrying out ultrasonic oil removal and sand blasting texturing treatment on a workpiece to be sprayed;
(2) and (3) spraying the workpiece to be sprayed after the treatment of the step (1) by adopting a plasma arc powder spraying process to form an anti-fretting wear alloy coating.
The coating must have the physicochemical properties that are consistent with those imparted by the original material, in order to have fretting wear resistance. The plasma arc Powder Spraying Process (PSP) has high flame flow temperature (about 15000-33000 ℃ C.) and can melt all high-melting-point and high-hardness materials. The coating is compact, the bonding strength is high, the heat influence on the workpiece is small, the workpiece is hardly deformed, and the working efficiency is high. The plasma arc spraying process is mature and reliable.
Preferably, the parameters of the plasma arc powder spraying process are as follows: the spraying angle is 90 degrees; the arc voltage is 60-62V; the power is 30-31 kW; the spraying distance is 62-64 mm; the powder feeding amount is controlled at 35 g/min; the spraying moving speed of the spray gun is controlled at 600 mm/s. The properties of the coating are determined by the degree to which the coating material is melted and accelerated in the arc flame jet. The powder should be sufficiently molten without excessive burn-up oxidation and the powder jet should have a sufficiently high velocity to ensure the compactness of the coating and the strength of the bond with the substrate. In order to ensure the processing precision, the process stability and the reliability of the arc-shaped processing surface coating of the blade root, a numerical control mechanical arm capable of realizing 6 degrees of freedom is adopted as a spray gun movement control device.
Preferably, the plasma arc powder spraying process is carried out in the working gas of Ar and H2The inert gas is ionized to form arc flame in protective atmosphere.
Controlling the degree of melting of the powder in the arc stream and the acceleration of the jet is a problem for such materials. The powder must enter the plasma arc flame at a certain feed rate, a certain initial velocity, achieve an optimum degree of melting and be accelerated to the work surface. This requires strict control of the stability of the various parameters, precise adjustment and control of the powder delivery (35 g/min), and also a reasonable determination of the spray distance of the gun from the workpiece surface. This allows satisfactory results in the melting and acceleration of the powder for spray deposition onto the work surface at the required temperature and velocity. After the powder flow entering the arc flame at a certain angle and speed is mixed with the arc flame in a crossing way, the heating acceleration time and path of the powder jet flow in the arc flame are controlled and adjusted, so that the powder jet flow can be fully melted and accelerated without overheating and burning loss. Forming cold state, heating to melt and accelerating to leave arc column to deposit on the surface of workpiece in molten state and high-speed jet flow. Therefore, the invention improves the structure of the spray gun, adjusts the structure size of the powder feeding nozzle and controls the initial speed and the angle of the powder entering the arc flame.
In addition to improvements in the spray gun and powder delivery system, special coating cooling measures must be employed during the spraying process. This is the key measure for determining the quality of the coating of the material. The invention adds cooling measures to the arc flame and the arc spot, and avoids overheating of the coating material.
Preferably, at least two cooling protective gas spray pipes are arranged at the nozzle of a spray gun used in the plasma arc powder spraying process; CO is introduced into the cooling protective gas spray pipe2A gas; the CO is2The air pressure of the air is controlled to be 4-6 Bar, and the air flow is controlled to be 600L/min.
Preferably, an air knife type aerosol removing device is further arranged at a position, close to a workpiece to be sprayed, of a nozzle of a spray gun used in the plasma arc powder spraying process, the air knife type aerosol removing device is provided with an ejection and absorption mechanism, the ejection and absorption mechanism is provided with an air inlet port and an air outlet port, the air inlet port is communicated with a compressed air bottle, and the air outlet port is provided with a duckbill structure. The working principle of the air knife type aerosol removal device is as follows: compressed air is used as an air source, and under the injection and suction effects of the injection and suction mechanism, air which is several times of the compressed air flow is driven to form strong air flow which is sprayed out of the duckbill-shaped nozzle to form flat air flow which is sprayed to the surface of a workpiece, so that the effects of flushing and cooling are achieved.
Preferably, in the step (2), before spraying, the workpiece to be sprayed, which is processed in the step (1), is placed in a protective tool, wherein the protective tool comprises a box body and a protective cover, and a convenient and stable workpiece clamping mechanism is arranged in the protective tool. The coating spraying is carried out after the workpiece is finished, and the surface of other parts is not allowed to be damaged due to splashing, clamping damage and collision. And the mechanical processing after the coating spraying is not carried out after the coating is formed.
The spraying protective tool is suitable for spraying and processing blade roots of various specifications by designing and using the special spraying protective tool with originality, is convenient and fast to clamp, can well position the position of a spraying surface, and completely protects the precision and cleanliness of parts which do not need to be sprayed. The protector can be clamped and positioned on a bench vice. The blades of different specifications are sprayed by using the same box body and the matched protective cover. When the spraying device is used, the blades are inversely arranged in the box body, the blades are positioned by depending on the platform of the blades, the screws are manually rotated and pressed by the elastic pressing sheets arranged in the box body, and then the protecting covers are closed to protect the positions, which are not sprayed, of the tops and the sides of the blades, so that spraying can be implemented. After the processing is finished, the protecting cover is removed, the pressing sheet is loosened, and then the workpiece can be taken out to enter the processing of the next workpiece. The protector has the following characteristics: the stainless steel is made, so that the precision and the strength are better; the spraying protection device can be suitable for spraying protection of blade roots of blades with different specifications; the method is generally used for the procedures of sand blasting, shot peening strengthening, plasma spraying and the like of the blade root of the blade, and has reliable protection effect; the device has better workpiece clamping and fixing effects, and is accurate in positioning and good in repeatability during spraying, and workpieces are convenient and quick to assemble and disassemble. The practical application of sand blasting and plasma spraying to the workpiece in the field is realized. The method achieves the aims of accurately spraying sand on the part to be sprayed on the workpiece, ensuring the quality of the sand spraying and simultaneously reliably protecting the precision of the part to be sprayed without sand spraying. The operation is convenient and fast.
Preferably, the fretting wear resistant alloy coating consists of the following components in percentage by mass: 32-36% of Ni, 3-5% of In and the balance of Cu.
Preferably, the thickness of the fretting wear resistant alloy coating is controlled to be 0.07-0.09 mm, and the roughness is less than or equal to 1 μm. The unit deposition of powder material on the surface of the workpiece is the primary factor in controlling the thickness and accuracy of the coating. The parameters for determining this factor are mainly the moving speed and uniformity of the spray gun, the interval and the overlapping amount of moving and overlapping of each coating, and the number of coating channels of the multi-layer spraying. The moving speed of the spray gun is accurately set through programming of the manipulator, the spray gun enters the spraying area in a reciprocating mode at a constant speed, coating overlapping forming is accurately carried out, the overall thickness of a coating is controlled to be about 1 mu m within an index size range, and the thickness difference (unevenness) of each position of the coating is less than or equal to 1 mu m.
Preferably, the Vickers hardness of the fretting wear resistant alloy coating is 140-190 HV.
Preferably, the fretting wear resistant alloy coating has a bond strength of greater than 22.1 MPa. The bond strength, metallographic structure (no internal defects such as high porosity, inclusions, cracks etc.) etc. of the coating must comply with strict technical requirements.
Therefore, the invention has the following beneficial effects: the process method and parameters, the anti-oxidation and cooling mist-discharging method, the rapid and reliable protection and shielding protective tool and the robot precisely control the motion of the spray gun, so that the obtained coating has an ideal coating structure, extremely low oxide inclusion and coating bonding strength greatly higher than index requirements, meets the required porosity and coating hardness, and meets the required and controllable coating thickness and precision.
Drawings
FIG. 1 is a schematic diagram of a plasma arc powder spray process and apparatus used therein.
Fig. 2 is a diagram of the actual use of the brace in a plasma arc powder spray process.
Fig. 3 is a schematic diagram of a gas knife type aerosol remover.
FIG. 4 is a topographical view of the fretting wear resistant alloy coating obtained in example 1.
FIG. 5 is a photomicrograph of the X200 version of the fretting wear resistant alloy coating obtained in example 1.
FIG. 6 is a pore distribution plot of the fretting wear resistant alloy coating obtained in example 1.
FIG. 7 is a graph of the porosity measurement of the fretting wear resistant alloy coating obtained in example 1.
FIG. 8 is a top view of the cupping test results for the fretting wear resistant alloy coating obtained in example 1.
FIG. 9 is a side view of the cupping test results for the fretting wear resistant alloy coating obtained in example 1.
FIG. 10 is a pictorial representation of the fretting wear resistant alloy coating obtained in example 1.
FIG. 11 is a topographical view of the fretting wear resistant alloy coating obtained in comparative example 1.
FIG. 12 is a topographical view of the fretting wear resistant alloy coating obtained in comparative example 2.
FIG. 13 is a topographical view of the fretting wear resistant alloy coating obtained in comparative example 3.
In the figure: the spray gun comprises a spray gun nozzle 1, a powder feeding nozzle 2, a plasma arc flame 3, a workpiece 4 to be sprayed, a cooling protective gas spray pipe 5, a powder jet flow 6, a spraying arc spot 7, a cooling protective atmosphere 8, an ejection and suction mechanism 9, an air inlet port 10, an air outlet port 11, compressed air 12 and air 13.
Detailed Description
The technical solution of the present invention is further specifically described below by using specific embodiments and with reference to the accompanying drawings.
In the present invention, all the equipment and materials are commercially available or commonly used in the art, and the methods in the following examples are conventional in the art unless otherwise specified.
The fretting wear resistant alloy material grades used in the following examples of the invention: metco 58NS hopper-Nickel-Indium Alloy Powder; the manufacturer: SULZER METCO THE COATINGS COMPANY (U.S.); the supplier: meta engineering trade (Shanghai) Inc. (SULZER METCO domestic Agents). The testing of the fretting wear resistant alloy coating product is carried out according to the standard requirements of GGC-0161 (R2) wear resistant coating for the blade root of a gas turbine air compressor.
Example 1
A preparation method of an anti-fretting wear alloy coating comprises the following steps:
(1) carrying out ultrasonic oil removal and sand blasting texturing treatment on a workpiece to be sprayed;
(2) placing the workpiece to be sprayed processed in the step (1) in a protective tool, wherein the protective tool comprises a box body and a protective cover (figure 2), a convenient and stable workpiece clamping mechanism is arranged in the protective tool, and then the protective tool is placed in an inert gas protective atmosphere (Ar 3000L/min, H)2300L/min) is sprayed with an anti-fretting wear alloy coating by adopting a plasma arc powder spraying process, wherein the anti-fretting wear alloy coating comprises the following components in percentage by mass: ni 36%, In 5%, balance Cu: the spraying angle is 90 degrees; arc voltage is 62V; the power is 31 kW; the spraying distance is 64 mm; the powder feeding amount is controlled at 35 g/min; a numerical control manipulator capable of realizing 6 degrees of freedom is used as a spray gun movement control device, and the spray gun spraying movement speed is controlled at 600 mm/s; two extended cooling protective gas nozzles 5 are arranged at two sides of the spray gun nozzle 1, and an air knife type mist removing device which is close to the surface side of the workpiece and is shown in figure 3 is provided with an injection mechanism 9, the injection mechanism is provided with an air inlet port 10 (the gas comprises compressed air 12 and air 13) and an air outlet port 11 of a duckbill structure, and the air inlet port is communicated with a compressed air bottle (not shown in the figure). The compressed air 12 is used as an air source, and under the action of injection and suction, the air which is several times of the compressed air flow is driven to form strong air flow which is ejected from an air outlet port of the duckbill structure to form flat air flow which is ejected to the surface of a workpiece, so that the effects of flushing and cooling are achieved; two protective gas nozzles are internally communicated with CO2A gas; CO 22The gas pressure is controlled at 4Bar, and the gas flow is controlled at 600L/min.
The morphology of the fretting wear resistant alloy coating obtained in this example is shown in fig. 4, fig. 5 (X200 body microscope photograph) and fig. 10 (physical picture), the surface is near silvery white, no oxide is deposited, and the coating surface is uniform in appearance (color, etc.) when sprayed in a specified area. Has no harmful defects such as peeling, nicks, cracks, expansion and the like, and has no scars, indentations and the like. No visible cracks are observed when the coating is magnified by 100 times, no electrode molten drops and impurity inclusions are detected in the coating, and the number of particles remained between the coating and the matrix cannot exceed 20 percent in a visual field magnified by 100 times.
The porosity of the fretting wear resistant alloy coating obtained in this example was examined by an image method, and the results are shown in fig. 6 and 7: the coating in the X100 visual field is empty and has the porosity: 0.24% (below 3%).
Grinding each test piece by a plane grinder, and measuring the thickness of the coating after spraying by a dial indicator after spraying, wherein the thickness of the coating is mostly distributed between 0.09 and 0.10, and a small amount of the coating is slightly higher than 0.10. The thickness difference of the coating layer of the same test piece is below 0.01. When the workpiece is sprayed, the thickness value of the coating can be accurately controlled by adjusting the moving speed of the spray gun.
The fretting wear resistant alloy coating obtained in this example was tested to have a hardness of 161HV and a bond strength of 55 MPa.
The cupping test showed no fracture when the steel sheet was pressed at a speed of 10mm/min to 7.6 mm, and the results are shown in FIG. 8 and FIG. 9.
Example 2
A preparation method of an anti-fretting wear alloy coating comprises the following steps:
(1) carrying out ultrasonic oil removal and sand blasting texturing treatment on a workpiece to be sprayed;
(2) the spraying work piece of treating after step (1) is handled is arranged in the protective equipment, and the protective equipment includes box body and protecting cover (fig. 2), is equipped with the convenient firm work piece fixture in the box body, but this protective equipment centre gripping is fixed a position on the bench vice, with the blade inversion pack into in the box body, relies on the platform location of blade itself, compresses tightly by the manual rotating screw rod of the elastic pressing piece from taking in the box body, closes the protecting cover again, and the protection is lived the position that blade top and side were not sprayed, can implement the spraying. Then in inert gas protective atmosphere (Ar 3000L/min, H)2320L/min), referring to fig. 1, a plasma arc powder spraying process is adopted to spray an anti-fretting wear alloy coating, and the anti-fretting wear alloy coating comprises the following components in percentage by mass: ni 32%, In 3%, balance Cu: the spraying angle is 90 degrees; the arc voltage is 60V; the power is 30 kW; the spraying distance is 62 mm; the powder feeding amount is controlled at 45 g/min; the spraying moving speed of the spray gun is controlled at 600 mm/s; two cooling protections are arranged at the position of a spray gun nozzle 1An air nozzle; introducing CO into the cooling protective gas spray pipe2Compressed air mixed gas (volume ratio 1: 2); CO 22The air pressure of the/compressed air mixed gas is controlled at 6Bar, and the air flow is controlled at 500L/min. After the processing is finished, the protecting cover is removed, the pressing sheet is loosened, and then the workpiece can be taken out to enter the processing of the next workpiece.
The hardness of the fretting wear resistant alloy coating obtained in the example is detected to be 140HV, and the bonding strength is 60 MP; the cup-shaped test shows that no fracture occurs when the steel sheet is pressed into the steel sheet at a speed of 10mm/min to a thickness of 7.6 mm.
Example 3
A preparation method of an anti-fretting wear alloy coating comprises the following steps:
(1) carrying out ultrasonic oil removal and sand blasting texturing treatment on a workpiece to be sprayed;
(2) arranging the workpiece to be sprayed, which is processed in the step (1), in a protective tool, wherein the protective tool comprises a box body and a protective cover (figure 2), a convenient and stable workpiece clamping mechanism is arranged in the box body, and then the workpiece is subjected to inert gas protective atmosphere (Ar 3000L/min, H)2310L/min), referring to fig. 1, a plasma arc powder spraying process is adopted to spray an anti-fretting wear alloy coating, and the anti-fretting wear alloy coating comprises the following components in percentage by mass: 35% of Ni, 4% of In, and the balance of Cu: the spraying angle is 90 degrees; the arc voltage is 60-62V; the power is 30 kW; the spraying distance is 63 mm; the powder feeding amount is controlled to be 40 g/min; the spraying moving speed of the spray gun is controlled at 600 mm/s; two extended cooling protective gas spray pipes and an air knife type gas removing and atomizing device (figure 3) close to the surface side of the workpiece are arranged at two sides of the spray gun nozzle. The structure is a device with the injection and suction functions, compressed air is used as an air source, under the injection and suction effects, the air which is several times of the compressed air flow is driven to form strong air flow, the strong air flow is ejected from a duckbill-shaped nozzle to form flat air flow, and the flat air flow is ejected to the surface of a workpiece, so that the effects of flushing and cooling are achieved; two cooling protective gas spray pipes are internally communicated with CO2A gas; CO 22The gas pressure is controlled at 4Bar, and the gas flow is controlled at 600L/min.
The hardness of the fretting wear resistant alloy coating obtained in the embodiment is detected to be 190HV, and the bonding strength is 65 MP; the cup-shaped test shows that no fracture occurs when the steel sheet is pressed into the steel sheet at a speed of 10mm/min to a thickness of 7.6 mm.
Comparative example 1 (non-cooling protective gas nozzle and air knife type aerosol remover)
The comparative example 1 is different from the example 1 in that the cooling protective gas spray pipe and the air knife type gas removing device are not arranged, and the rest processes are completely the same. The morphology of the obtained fretting wear resistant alloy coating is shown in fig. 11, and the surface has obvious brownish red copper oxide deposition.
Comparative example 2 (higher pressure and flow of cooling gas)
Comparative example 1 differs from example 1 in that CO2The air pressure of the/compressed air mixed gas is controlled at 3Bar, the air flow is controlled at 400L/min, and other processes are completely the same. At high temperature, the cooling nozzle of the cooling protective gas spray pipe is damaged, the appearance of the obtained fretting wear resistant alloy coating is shown in figure 12, and brown-red copper oxide deposition and obvious brown-red copper oxide deposition still occur on the surface to a certain degree.
Comparative example 3 (Cooling gas pressure, flow rate lower)
Comparative example 1 differs from example 1 in that CO2The air pressure of the/compressed air mixed gas is controlled at 7Bar, the air flow is controlled at 700L/min, and the rest processes are completely the same. The morphology of the obtained fretting wear resistant alloy coating is shown in fig. 13, and the surface has obvious brownish red copper oxide deposition.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the spirit of the invention as set forth in the claims.
Claims (10)
1. The preparation method of the fretting wear resistant alloy coating is characterized by comprising the following steps:
(1) carrying out ultrasonic oil removal and sand blasting texturing treatment on a workpiece to be sprayed;
(2) and (3) spraying the workpiece to be sprayed after the treatment of the step (1) by adopting a plasma arc powder spraying process to form an anti-fretting wear alloy coating.
2. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein parameters of a plasma arc powder spraying process are as follows: the spraying angle is 90 degrees; the arc voltage is 60-62V; the power is 30-31 kW; the spraying distance is 62-64 mm; controlling the powder feeding amount to be 35-45 g/min; the spraying moving speed of the spray gun is controlled at 600 mm/s.
3. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein the working gas is Ar or H in a plasma arc powder spraying process2The inert gas is ionized to form arc flame in protective atmosphere.
4. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein at least two cooling shielding gas nozzles are arranged at the nozzle of a spray gun used in a plasma arc powder spraying process; CO is introduced into the cooling protective gas spray pipe2A gas; the CO is2The air pressure of the air is controlled to be 4-6 Bar, and the air flow is controlled to be 600L/min.
5. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein an air knife type aerosol removal device is further arranged at a position, close to a workpiece to be sprayed, of a nozzle of a spray gun for a plasma arc powder spraying process, the air knife type aerosol removal device is provided with an ejection and suction mechanism, the ejection and suction mechanism is provided with an air inlet port and an air outlet port, the air inlet port is communicated with a compressed air bottle, and the air outlet port is provided with a duckbill structure.
6. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein in the step (2), before spraying, the workpiece to be sprayed, which is processed in the step (1), is placed in a protector, wherein the protector comprises a box body and a protective cover, and a workpiece clamping mechanism is arranged in the protector.
7. The preparation method of the fretting wear resistant alloy coating according to claim 1, wherein the fretting wear resistant alloy coating is composed of the following components in percentage by mass: 32-36% of Ni, 3-5% of In and the balance of Cu.
8. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein the thickness of the fretting wear resistant alloy coating is controlled to be 0.07-0.09 mm, and the unevenness is less than or equal to 1 μm.
9. The method for preparing the fretting wear resistant alloy coating according to claim 1, wherein the Vickers hardness of the fretting wear resistant alloy coating is 140-190 HV.
10. The method of claim 1, wherein the fretting wear resistant alloy coating has a bond strength greater than 22.1 MPa.
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| CN202010441904.3A CN111575633A (en) | 2020-05-22 | 2020-05-22 | Preparation method of fretting wear resistant alloy coating |
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| CN202010441904.3A Pending CN111575633A (en) | 2020-05-22 | 2020-05-22 | Preparation method of fretting wear resistant alloy coating |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930706A (en) * | 2021-09-02 | 2022-01-14 | 西安交通大学 | Plasma spraying fretting wear resistant metal alloy coating and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2615022B1 (en) * | 1976-04-07 | 1977-07-21 | Agefko Kohlensaeure Ind | Method of coating a surface by means of a jet of heated gas and molten material |
| JPH1180921A (en) * | 1997-07-09 | 1999-03-26 | Nippon Piston Ring Co Ltd | Wettable sprayed coating layer for sliding member |
| CN101158017A (en) * | 2007-11-19 | 2008-04-09 | 北京矿冶研究总院 | CuNiIn coating material and preparation method of coating |
| CN202643819U (en) * | 2012-04-27 | 2013-01-02 | 贵州黎阳航空动力有限公司 | Thermal spraying cooling device |
| CN102883834A (en) * | 2010-03-12 | 2013-01-16 | 大众汽车有限公司 | Method for producing a coolable moulding tool, and molding tool produced using said method |
| CN105506532A (en) * | 2015-12-08 | 2016-04-20 | 中国航空工业集团公司成都飞机设计研究所 | Cooling method for thermal spraying |
| CN207294875U (en) * | 2017-09-20 | 2018-05-01 | 芜湖通潮精密机械股份有限公司 | A kind of cooling removal of impurities structure being used in plasma spraying |
-
2020
- 2020-05-22 CN CN202010441904.3A patent/CN111575633A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2615022B1 (en) * | 1976-04-07 | 1977-07-21 | Agefko Kohlensaeure Ind | Method of coating a surface by means of a jet of heated gas and molten material |
| JPH1180921A (en) * | 1997-07-09 | 1999-03-26 | Nippon Piston Ring Co Ltd | Wettable sprayed coating layer for sliding member |
| CN101158017A (en) * | 2007-11-19 | 2008-04-09 | 北京矿冶研究总院 | CuNiIn coating material and preparation method of coating |
| CN102883834A (en) * | 2010-03-12 | 2013-01-16 | 大众汽车有限公司 | Method for producing a coolable moulding tool, and molding tool produced using said method |
| CN202643819U (en) * | 2012-04-27 | 2013-01-02 | 贵州黎阳航空动力有限公司 | Thermal spraying cooling device |
| CN105506532A (en) * | 2015-12-08 | 2016-04-20 | 中国航空工业集团公司成都飞机设计研究所 | Cooling method for thermal spraying |
| CN207294875U (en) * | 2017-09-20 | 2018-05-01 | 芜湖通潮精密机械股份有限公司 | A kind of cooling removal of impurities structure being used in plasma spraying |
Non-Patent Citations (1)
| Title |
|---|
| 杨耀华: "《等离子喷涂和燃烧火焰喷涂技术》", 31 December 1984, 国防工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113930706A (en) * | 2021-09-02 | 2022-01-14 | 西安交通大学 | Plasma spraying fretting wear resistant metal alloy coating and preparation method thereof |
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