A method of heat treatment of a wear particle resistant coating and an apparatus therefor

Abstract

The application relates to the technical field of coating preparation, in particular to a wear particle wear-resistant coating heat treatment method and a preparation device thereof, which comprises a main part, a release part and a preparation device; the main part comprises a mixing assembly, a quantitative assembly arranged in the mixing assembly and a shielding assembly arranged outside the quantitative assembly; the release part comprises a partition assembly arranged in the mixing assembly, a control assembly arranged outside the shielding assembly and a guide assembly arranged outside the control assembly; firstly, the crushed material is sent into the mixing assembly, then the material is proportioned through the quantitative assembly, the quantitative assembly and the shielding assembly are controlled to rotate, the shielding assembly is separated from the discharge port of the quantitative assembly under the resistance of the guide assembly, the material enters the partition assembly, the proportioning of the ceramic particles and the metal powder is realized, when a certain amount of material is accumulated in the partition assembly, the partition assembly releases the material into the stirring cavity A2, and the mixing and proportioning of the ceramic particles and the metal powder are realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating preparation, in particular to a wear particle abrasion resistant coating heat treatment method and a preparation device thereof. BACKGROUND

[0002] Wear is one of the main failure modes of mechanical equipment, statistical analysis shows that about 80% of the parts failure is caused by various forms of wear, among which, wear particle abrasion is one of the important reasons for the failure of modern industrial equipment and its parts, which widely exists in the fields of ship, energy, machinery, metallurgy, construction and aviation, practice shows that surface coating technology not only can repair and remanufacture the failed parts, save materials and energy, but also can greatly improve the service performance of the parts, which is a simple and effective technical means.

[0003] The coating prepared by supersonic flame spraying greatly improves the service life of the parts due to its excellent wear resistance, high temperature oxidation resistance and corrosion resistance, however, the mechanical combination between the supersonic flame sprayed coating and the substrate seriously affects the friction and wear performance, at the same time, heat treatment in air will cause high temperature oxidation of the coating metal, which increases the equipment operation risk, in addition, the current heat treatment time is relatively long, which causes the change of the mechanical properties of the substrate or the decomposition of the hard particles, thereby reducing the service performance of the substrate and the coating, furthermore, manual feeding is needed in the preparation process of the coating, which is relatively complicated and has defects. SUMMARY

[0004] In view of the above or the problem of manual feeding in the prior art, the present application is proposed.

[0005] Therefore, the purpose of the present application is to provide a wear particle abrasion resistant coating heat treatment method and a preparation device thereof.

[0006] To solve the above technical problems, the present application provides the following technical scheme: including,

[0007] First, the required materials are crushed and mixed by the mixing structure;

[0008] The mixed materials are placed in a vacuum drying box for drying;

[0009] Then, the substrate to be sprayed is pretreated, and the treated substrate is sprayed;

[0010] After the spraying is completed, the coating on the surface of the substrate is heated.

[0011] As a preferred scheme of the wear particle abrasion resistant coating heat treatment method, the surface of the substrate is wiped with alcohol, and then the substrate is sand blasted.

[0012] As a preferred scheme of the heat treatment method of the wear-resistant particle wear coating of the present application, the coating is sprayed onto the surface of the substrate by the ultra-high speed flame spraying method, and then the sprayed substrate is placed in a brazing furnace for heating.

[0013] A preparation device comprises the mixing structure as described above, which comprises;

[0014] The main component comprises the mixing assembly, the metering assembly arranged in the mixing assembly, and the shielding assembly arranged outside the metering assembly.

[0015] The releasing component comprises the partition assembly arranged in the mixing assembly, the control assembly arranged outside the shielding assembly, and the guiding assembly arranged outside the control assembly.

[0016] As a preferred scheme of the preparation device of the present application, the mixing assembly comprises the stirring barrel, the feeding hopper arranged on the stirring barrel, and the stirring member arranged in the stirring barrel.

[0017] As a preferred scheme of the preparation device of the present application, the metering assembly comprises the rotating disc arranged outside the stirring member, and the metering hopper arranged on the rotating disc.

[0018] As a preferred scheme of the preparation device of the present application, the shielding assembly comprises the shielding plate arranged below the metering hopper, the movable slot opened on the shielding plate, the gap opened outside the shielding plate, the rotating rod arranged in the gap, and the L-shaped connecting rod arranged outside the rotating rod.

[0019] The L-shaped connecting rod is connected with the metering hopper.

[0020] As a preferred scheme of the preparation device of the present application, the partition assembly comprises the partition disc arranged in the stirring barrel, the feeding port opened on the partition disc, and the control hopper arranged at the feeding port.

[0021] As a preferred scheme of the preparation device of the present application, the control assembly comprises the movable rod arranged in the movable slot, the L-shaped output rod arranged outside the movable rod, and the rolling ball arranged at the end of the L-shaped output rod.

[0022] As a preferred scheme of the preparation device of the present application, the guiding assembly comprises the sleeve arranged at the end of the partition disc, the control disc arranged at the end of the sleeve, the concave annular groove opened outside the control disc, the opening opened outside the control disc corresponding to the position of the feeding port, and the abutting block arranged in the concave annular groove.

[0023] The beneficial effects of the preparation device of the present invention are as follows: The mixing component is divided into an equipment chamber and a stirring chamber by a partition component. Then, the crushed ceramic particles and metal powder are fed into the mixing component through a conveying device. During the rotation of the mixing component, the metering component moves to the bottom of the mixing component to receive the ceramic particles and metal powder. During the rotation of the metering component, the shielding component and the control component move within the guide component. Under the resistance of the guide component, the end of the control component moves downward and drives the shielding component away from the outlet of the metering component, thereby allowing the ceramic particles and metal powder to enter the partition component, thus achieving the ratio between the ceramic particles and metal powder. When a certain amount of ceramic particles and metal powder accumulates in the partition component, the partition component will release the ceramic particles and metal powder into the stirring chamber, thereby achieving the purpose of mixing and metering the ceramic particles and metal powder. In addition, the partition component can prevent the metal powder and ceramic particles from entering the equipment chamber during the mixing process. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a microstructure diagram of the coating.

[0026] Figure 2 Schematic diagram of abrasion-resistant coating after heat treatment Figure 1 .

[0027] Figure 3 Schematic diagram of abrasion-resistant coating after heat treatment Figure 2 .

[0028] Figure 4 This is a schematic diagram of the heat treatment method and preparation apparatus for abrasion-resistant coatings.

[0029] Figure 5 This is a schematic diagram of the internal structure of the preparation device.

[0030] Figure 6 A schematic diagram of the shielding component structure of its preparation device.

[0031] Figure 7 This is a schematic diagram of the partition and control components of the preparation device.

[0032] Figure 8 This is a schematic diagram of the guiding component structure of the preparation device. Detailed Implementation

[0033] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0034] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application, however, can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that variations can be made in view of what is described herein, by a worker of ordinary skill in the art, without departing from the spirit and scope of the present application.

[0035] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. "In one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an embodiment that is separate or alternative to other embodiments.

[0036] Embodiment 1, with reference to Figures 1 to 3 For the first embodiment of the present application, the embodiment provides a wear particle wear resistant coating heat treatment method, comprising,

[0037] First, the materials required for preparation are crushed, and the materials are mixed by mixing structure S;

[0038] The mixed materials are placed in a vacuum drying oven for drying;

[0039] Then, the substrate to be sprayed is pretreated, and the treated substrate is sprayed;

[0040] After spraying, the coating on the surface of the substrate is heated.

[0041] The surface of the substrate is wiped with alcohol, and then the substrate is sandblasted;

[0042] The coating is sprayed onto the surface of the substrate by supersonic flame spraying method, and then the sprayed substrate is placed in a brazing furnace for heating;

[0043] The designed powder is placed in a vacuum drying oven for drying for 3h;

[0044] The substrate stainless steel is cleaned with alcohol and sandblasted;

[0045] According to the designed supersonic flame spraying process parameters, the coating is prepared by supersonic flame spraying method, the spraying distance is 190mm, the powder feeding amount is 50g / min, the oxygen pressure is 1.0MPa, the propane pressure is 0.6MPa, the compressed air pressure is 0.7MPa, and the nitrogen pressure is 1.0MPa;

[0046] After spraying, the sample is heated to 1050℃ in a brazing furnace for 5 minutes, at which time the coating reaches the solid-liquid phase line and forms a metallurgical diffusion bond with the substrate, then the heating is stopped and the sample is cooled in the furnace;

[0047] The prepared coating is uniform and dense, without defects such as cracks, and has a thickness of about 1mm;

[0048] Under the conditions of 100-mesh brown corundum as the abrasive, a rubber wheel diameter of 222.5mm, a sand flow rate of 70g / min, a load of 50N, and abrasive wear for 15min at room temperature, the friction weight loss is 0.0416g, the wear amount is significantly reduced, the wear resistance is improved, and no furrow and particle drop phenomenon occurs Figure 2 );

[0049] The designed powder is placed in a vacuum drying oven for drying for 3h;

[0050] The substrate stainless steel is alcohol cleaned and sand blasted;

[0051] According to the designed supersonic flame spraying process parameters, the coating is prepared by supersonic flame spraying, with a spraying distance of 190mm, a powder feeding rate of 50g / min, an oxygen pressure of 1.0MPa, a propane pressure of 0.6MPa, a compressed air pressure of 0.7MPa, and a nitrogen pressure of 1.0MPa;

[0052] After spraying, the sample is heated to 1050℃ in a brazing furnace for 5 minutes, at which time the coating reaches the solid-liquid phase line and forms a metallurgical diffusion bond with the substrate, then the heating is stopped and the sample is cooled in the furnace;

[0053] The prepared coating is uniform and dense, without defects such as cracks, and has a thickness of about 1mm;

[0054] Under the conditions of 100-mesh brown corundum as the abrasive, a rubber wheel diameter of 222.5mm, a sand flow rate of 70g / min, a load of 50N, and abrasive wear for 15min at room temperature, the friction weight loss is 0.01985g, the wear amount is significantly reduced, the wear resistance is improved, and no furrow and particle drop phenomenon occurs Figure 3 );

[0055] In this way, the high-temperature thermal diffusion of the coating is completed, the bonding strength and cohesive strength are improved, and the mechanical properties of the substrate are effectively prevented from being reduced due to a long heat treatment time;

[0056] Due to the excellent characteristics of metallurgical bonding, the coating can effectively resist wear deformation caused by complex stress loading;

[0057] In addition, the heat treatment under vacuum avoids the problem of blocked high-temperature thermal diffusion and insufficient metallurgical bonding caused by metal oxidation during heat treatment in air.

[0058] Embodiment 2, reference Figures 1 to 4 , for the second embodiment of the application, unlike the previous embodiment, a preparation device, comprising; main component 100, including the mixing assembly 101, quantitative assembly 102 provided in the mixing assembly 101, and shielding assembly 103 provided outside the quantitative assembly 102; release component 200 includes the partition assembly 201 provided in the mixing assembly 101, control assembly 202 provided outside the shielding assembly 103, and guide assembly 203 provided outside the control assembly 202, the mixing assembly 101 is divided into device cavity A1 and stirring cavity A2 by the partition assembly 201, then the crushed ceramic particles and metal powder are sent into the mixing assembly 101 through the conveying device, then in the process of rotating the mixing assembly 101, the quantitative assembly 102 is moved to the lower part of the mixing assembly 101, while the ceramic particles and metal powder are removed, and in the process of rotating the quantitative assembly 102, the shielding assembly 103 and the control assembly 202 are moved in the guide assembly 203, and under the resistance of the guide assembly 203, the end of the control assembly 202 moves downward, and the shielding assembly 103 moves away from the discharge port of the quantitative assembly 102, so that the ceramic particles and metal powder enter the partition assembly 201, thereby realizing the proportioning of the ceramic particles and metal powder, when a certain amount of ceramic particles and metal powder are accumulated in the partition assembly 201, the partition assembly 201 will release the ceramic particles and metal powder into the stirring cavity A2, thereby achieving the purpose of mixing and quantifying the ceramic particles and metal powder, in addition, the setting of the partition assembly 201 can prevent the metal powder and ceramic particles from entering the device cavity A1 during mixing.

[0059] The remaining structure is the same as that of embodiment 1.

[0060] Embodiment 3, reference Figures 1 to 8 , for the third embodiment of the application, unlike the previous embodiment, the mixing assembly 101 includes a stirring barrel 101a, a feed hopper 101b provided on the stirring barrel 101a, and a stirring element 101c provided in the stirring barrel 101a, the stirring barrel 101a is provided with the stirring element 101c, the stirring element 101c is composed of a stepping motor, a shaft and stirring blades, the top of the stirring barrel 101a is provided with a pair of feed hoppers 101b, and the discharge openings 203d of the pair of feed hoppers 101b are of different sizes, and the feed hopper 101b with the small opening 203d is arranged close to the center of the stirring barrel 101a, so that the quantitative assembly 102 will not load metal powder and ceramic particles at the same time during rotation.

[0061] Specifically, the quantitative component 102 comprises a rotating disc 102a arranged outside the stirring piece 101c, and a hopper 102b arranged on the rotating disc 102a; the shielding component 103 comprises a shielding plate 103a arranged below the hopper 102b, a movable slot 103b arranged on the shielding plate 103a, an opening 103c arranged outside the shielding plate 103a, a rotating rod 103d arranged in the opening 103c, and an L-shaped connecting rod 103e arranged outside the rotating rod 103d; wherein the L-shaped connecting rod 103e is connected with the hopper 102b, the rotating disc 102a is fixedly connected inside the stirring barrel 101a and outside the shaft, a pair of hoppers 102b are fixedly connected inside the rotating disc 102a and located at the positions of the feed hoppers 101b, and the pair of hoppers 102b are matched with the pair of feed hoppers 101b; the hopper 102b with a large opening 203d is used to receive ceramic particles, and the hopper 102b with a small opening 203d is used to receive metal powder; in addition, the ratio of the internal capacity of the hopper 102b with the small opening 203d to the internal capacity of the hopper 102b with the large opening 203d is between 1 / 3 and 1 / 9, so that the wear resistance of the coating can be obviously enhanced. The ceramic particles are uniformly dispersed in the coating, and the coating has no defects such as cracks;

[0062] A pair of shielding plates 103a are arranged at the discharge ports of the pair of hoppers 102b, and the shielding plates 103a are arranged on the same side and have openings 103c; the rotating rods 103d are rotatably connected in the openings 103c, the L-shaped connecting rods 103e are fixedly connected outside the rotating rods 103d, and the ends of the L-shaped connecting rods 103e are connected with the hoppers 102b; the shielding plates 103a play a role in plugging the discharge ports of the hoppers 102b, the openings 103c are arranged in cooperation with the rotating rods 103d and the L-shaped connecting rods 103e, so that the shielding plates 103a can be opened and closed relative to the hoppers 102b, and the metal powder and the ceramic particles in the hoppers 102b can be released.

[0063] In the process of rotating the stirring piece 101c, the rotating disc 102a is driven to rotate, and the hoppers 102b arranged on the rotating disc 102a have a rotating track matched with the feed hoppers 101b; under the control of the stepping motor, when the hopper 102b moves to the position below the feed hopper 101b, the stepping motor stops driving the shaft to rotate, at this time, the end of the feed hopper 101b is no longer shielded by the rotating disc 102a, so that the material in the feed hopper 101b enters the hopper 102b; when the hopper 102b is driven by the stepping motor to the corresponding position of the partition assembly 201, the shielding plates 103a are opened and closed to release the discharge port of the hopper 102b, so that the material in the hopper 102b enters the partition assembly 201.

[0064] Further, the partition assembly 201 comprises a partition disc 201a arranged in the stirring barrel 101a, a feeding port 201b arranged on the partition disc 201a, and a control hopper 201c arranged at the feeding port 201b. The inside of the stirring barrel 101a is fixedly connected with the partition disc 201a. The stirring barrel 101a is above the partition disc 201a to form a device cavity A1, and is below the partition disc 201a to form a stirring cavity A2. The partition disc 201a is rotationally connected with the shaft rod. The partition disc 201a is provided with the feeding port 201b. The bottom of the partition disc 201a is provided with the control hopper 201c at the position of the feeding port 201b. When the above-mentioned quantitative hopper 102b is rotated to the feeding port 201b, the material in the quantitative hopper 102b is released into the control hopper 201c through the opening and closing of the shielding plate 103a. The control hopper 201c is provided with an inductor. When the material collected in the control hopper 201c reaches a certain weight, the bottom of the control hopper 201c will open to pour the material in the control hopper 201c into the stirring cavity A2, and then the material is stirred by the stirring piece 101c. After pouring, the control hopper 201c will be closed under the control of the inductor, so as to achieve the purpose of quantitative pouring, and the ceramic particles and metal powder can be prevented from entering the device cavity A1 during stirring.

[0065] Further, the control assembly 202 comprises a movable rod 202a arranged in the movable groove 103b, an L-shaped output rod 202b arranged outside the movable rod 202a, and a rolling ball 202c arranged at the end of the L-shaped output rod 202b. The guide assembly 203 comprises a sleeve 203a arranged at the end of the partition disc 201a, a control disc 203b arranged at the end of the sleeve 203a, a concave annular groove 203c arranged outside the control disc 203b, an opening 203d arranged outside the control disc 203b corresponding to the position of the feeding port 201b, and a resisting block 203e arranged in the concave annular groove 203c. The top end of the partition disc 201a is fixedly connected with the sleeve 203a. The sleeve 203a is sleeved outside the shaft rod. The end of the sleeve 203a is fixedly connected with the control disc 203b. The outside of the control disc 203b is provided with the concave annular groove 203c. The outside of the control disc 203b is provided with the opening 203d. The control disc 203b is provided with a pair of resisting blocks 203e corresponding to the opening 203d in the concave annular groove 203c. The pair of resisting blocks 203e are arranged in a slope shape. The slopes between the pair of resisting blocks 203e are oppositely arranged. The bottom of the shielding plate 103a is provided with the movable groove 103b. The movable groove 103b is movably connected with the movable rod 202a. The outside of the movable rod 202a is fixedly connected with the L-shaped output rod 202b. The end of the L-shaped output rod 202b is rotationally connected with the rolling ball 202c. The rolling ball 202c is movably connected in the concave annular groove 203c.

[0066] When the shutter plate 103a is rotated to the position of the opening 203d following the rotation of the hopper 102b, the L-shaped output rod 202b will be resisted by the resisting block 203e, so that the L-shaped output rod 202b rotates downward around the rolling ball 202c, and the other end of the L-shaped output rod 202b will push the movable rod 202a to slide in the movable slot 103b, and then the shutter plate 103a will open around the rotating rod 103d, at this time the material in the hopper 102b will be poured into the control hopper 201c, and in this process, the L-shaped output rod 202b will be limited by the resisting block 203e after the shutter plate 103a is opened to the maximum, so that the shutter plate 103a is always in an open state, facilitating the complete discharge of the material in the hopper 102b, when the L-shaped output rod 202b moves to the end of the opening 203d, it will resist another resisting block 203e, and since the slopes of the two resisting blocks 203e are opposite, the L-shaped output rod 202b rotates upward around the rolling ball 202c, at this time the end of the L-shaped output rod 202b will push the movable rod 202a to slide in the movable slot 103b, and also push the shutter plate 103a to open again around the rotating rod 103d to shield the discharge opening of the hopper 102b, so as to achieve the purpose of controlling the discharge of the hopper 102b.

[0067] The rest of the structure is the same as that of Example 2.

[0068] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Accordingly, all such variations are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be changed, or reordered, according to alternative embodiments. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functions and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating

[0069] Furthermore, in the interest of providing a concise description of illustrative embodiments, not all features of an actual implementation can be described (that is, not all

[0070] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure.

[0071] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not to limit the present application, and although the present application is described in detail with reference to the preferred embodiments, it should be understood by those ordinarily skilled in the art that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A preparation apparatus, characterized in that: It includes; The main component (100) includes a mixing component (101), a metering component (102) disposed within the mixing component (101), and a shielding component (103) disposed outside the metering component (102). The release assembly (200) includes a partition assembly (201) disposed within the mixing assembly (101), a control assembly (202) disposed outside the shielding assembly (103), and a guide assembly (203) disposed outside the control assembly (202). The mixing assembly (101) includes a mixing tank (101a), a feed hopper (101b) disposed on the mixing tank (101a), and a mixing element (101c) disposed inside the mixing tank (101a). The metering component (102) includes a rotating disk (102a) disposed outside the stirring component (101c) and a metering hopper (102b) disposed on the rotating disk (102a).

2. The preparation apparatus according to claim 1, characterized in that: The shielding assembly (103) includes a shielding plate (103a) disposed under the metering hopper (102b), a movable groove (103b) opened on the shielding plate (103a), a notch (103c) opened outside the shielding plate (103a), a rotating rod (103d) disposed in the notch (103c), and an L-shaped connecting rod (103e) disposed outside the rotating rod (103d). The L-shaped connecting rod (103e) is connected to the metering hopper (102b).

3. The preparation apparatus according to claim 2, characterized in that: The partition assembly (201) includes a partition plate (201a) disposed in the mixing tank (101a), a feed inlet (201b) opened on the partition plate (201a), and a control hopper (201c) disposed at the feed inlet (201b).

4. The preparation apparatus as described in claim 3, characterized in that: The control component (202) includes a movable rod (202a) disposed in the movable groove (103b), an L-shaped output rod (202b) disposed outside the movable rod (202a), and a ball bearing (202c) disposed at the end of the L-shaped output rod (202b).

5. The preparation apparatus as described in claim 4, characterized in that: The guide assembly (203) includes a sleeve (203a) at the end of the partition plate (201a), a control plate (203b) at the end of the sleeve (203a), a concave annular groove (203c) outside the control plate (203b), an opening (203d) outside the control plate (203b) corresponding to the feed inlet (201b), and an abutment block (203e) inside the concave annular groove (203c).

6. A heat treatment method for an abrasion-resistant coating, characterized in that: The preparation apparatus as described in any one of claims 1 to 5 includes, First, the required materials are pulverized and then mixed using a hybrid structure (S); The mixed materials are placed in a vacuum drying oven to dry; Then, the substrate to be sprayed is pretreated, and the treated substrate is then sprayed. After spraying, the coating on the substrate surface is heated.

7. The heat treatment method for the abrasion-resistant coating as described in claim 6, characterized in that: Wipe the substrate surface with alcohol, and then sandblast the substrate.

8. The heat treatment method for the abrasion-resistant coating as described in claim 7, characterized in that: The coating is applied to the substrate surface using a supersonic flame spraying method, and then the coated substrate is placed in a brazing furnace for heating.

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