Device and method for preparing SiC composite coating

Abstract

The invention relates to the technical field of material surface modification, and discloses a device and method for preparing a SiC composite plating, the device for preparing the SiC composite plating comprises a constant temperature water bath kettle, the constant temperature water bath kettle is used for providing a constant temperature environment for plating, the constant temperature water bath kettle comprises a machine shell, an inner container and an outer cover, the inner container and the outer cover are both fixedly installed in the machine shell. The batching mechanism comprises a batching kettle, a bracket and a batching frame; the stirring mechanism comprises a stirring main shaft, a stirring motor and a plurality of stirring auxiliary shafts, and the stirring main shaft and the stirring auxiliary shafts are rotationally connected to the inner wall of the bottom of the batching kettle. According to the invention, the design is reasonable, the automatic batching work of plating solution raw materials can be realized through the arranged batching mechanism, the batching efficiency can be improved through the arranged stirring mechanism, constant-temperature plating is carried out through the arranged constant-temperature water bath kettle, and the constant temperature is beneficial to uniform distribution of reaction substances in the plating solution, so that a more uniform and smoother plating layer is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of material surface modification, and in particular to a device and method for preparing a SiC composite coating. Background Art

[0002] Silicon carbide (SiC) is widely used in various industrial fields due to its excellent physical and chemical properties, such as high hardness, good wear resistance, corrosion resistance and high temperature stability. In many applications, SiC needs to be applied to the surface of metal or other substrates in the form of a coating to improve the surface properties of the substrate. However, the traditional SiC coating preparation method uses manual control, resulting in low preparation efficiency and poor control of coating quality; therefore, we propose a device and method for preparing SiC composite coatings to solve this problem. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the traditional SiC coating preparation method using manual control, resulting in low preparation efficiency and poor control of coating quality, and to propose a device and method for preparing SiC composite coatings.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A device for preparing a SiC composite coating, comprising:

[0006] A constant temperature water bath, which is used to provide a constant temperature environment for plating, and comprises a casing, an inner liner and an outer cover, wherein the inner liner and the outer cover are both fixedly installed in the casing;

[0007] A batching mechanism, the batching mechanism comprises a batching kettle, a bracket and a batching rack, the batching kettle is detachably mounted in the bracket, and both sides of the bottom of the bracket are fixedly connected with support plates, the support plates and the batching rack are fixedly mounted on the top of the casing, a plurality of electronic scales are arranged on the top of the electronic scales, a beaker is arranged on the top of the electronic scales, and a stirring mechanism is arranged inside the batching kettle;

[0008] The stirring mechanism includes a stirring main shaft, a stirring motor and multiple stirring sub-shafts, the stirring main shaft and the stirring sub-shafts are both rotatably connected to the bottom inner wall of the batching kettle, and multiple main stirring paddles are fixedly installed on the outer side of the batching main shaft, multiple sub-stirring paddles are fixedly installed on the outer side of the stirring sub-shaft, and a small gear is fixedly connected to the bottom end of the sub-stirring shaft, a large gear is fixedly installed at the bottom end of the stirring main shaft, and multiple small gears are meshed with the large gear, and the output end of the stirring motor is fixedly connected to the bottom end of one of the stirring sub-shafts.

[0009] Preferably, a mounting frame is fixedly mounted on one side of the stirring motor, and the mounting frame is fixedly mounted on the bottom of the batching kettle;

[0010] The bottom of the batching kettle is connected with a discharge pipe, and a control valve is arranged in the discharge pipe.

[0011] Preferably, both sides of the bracket are slidably sleeved with connecting plates, and the two connecting plates are fixedly connected with a clamping plate on one side close to each other, and both sides of the batching kettle are provided with a clamping groove, and the two clamping plates are movably clamped in the corresponding clamping grooves respectively;

[0012] A compression spring and a pull rod are fixedly connected to the other side of the connecting plate, the other end of the compression spring is fixedly connected to the corresponding support plate, and the pull rod is slidably connected in the corresponding support plate, and the other end of the pull rod is fixedly connected to a pull ring.

[0013] Preferably, a plurality of positioning pins are fixedly installed inside the bracket, a plurality of pin grooves are provided at the bottom of the batching kettle, and the positioning pins are movably inserted into the corresponding pin grooves.

[0014] Preferably, a driving motor is fixedly mounted on the bottom inner wall of the casing, the output shaft of the driving motor extends between the outer cover and the inner tank and is fixedly connected to a stirring frame, an electric heating tube is fixedly connected to the bottom inner wall of the outer cover, and reinforcement plates are fixedly connected to both sides of the bottom of the outer cover, and the bottom of the reinforcement plate is fixedly connected to the top inner wall of the casing.

[0015] Preferably, the outer side of the outer cover is connected with a water inlet pipe and a water outlet pipe, and a temperature sensor is fixedly mounted on the inner wall of the outer cover.

[0016] Preferably, a controller is fixedly mounted on one side of the housing, and the controller is electrically connected to the temperature sensor, the stirring motor and the driving motor;

[0017] The front side of the controller is provided with a temperature panel, a high temperature warning light and a control switch.

[0018] Preferably, support beams are fixedly mounted on both the front and rear sides of the bracket, and the support beams are fixedly mounted on the top of the housing.

[0019] The present invention also provides a method for preparing a SiC composite coating, comprising the following steps:

[0020] S1: Rinse the beaker and batching kettle with deionized water, put 1-5 parts of SiC micro-nano powder, 25 parts of nickel sulfate, 20-23 parts of sodium bicarbonate, 27 parts of sodium hypophosphite, 1 part of sodium fluoride, and 1-2 parts of stabilizer into each beaker, weigh and confirm using an electronic scale, take 2 parts of lactic acid solution, and dissolve them with a small amount of distilled water or deionized water respectively;

[0021] S2: slowly add sodium bicarbonate solution into the batching kettle in small amounts and multiple times, start the stirring motor to drive one of the stirring secondary shafts to rotate, and drive the large gear and the stirring main shaft to rotate through the meshing of the corresponding small gear and the large gear, and the large gear drives the other stirring secondary shafts to rotate through the meshing of other small gears, thereby driving the main stirring paddle and the auxiliary stirring paddle to rotate, so as to achieve stirring of the solution, and pour the completely dissolved nickel sulfate solution after the bubbles dissipate;

[0022] S3: Pour SiC micro-nano powder and fully dissolved sodium hypophosphite solution, sodium fluoride and stabilizer into the batching kettle, and control the output shaft of the driving motor to accelerate the rotation, thereby increasing the rotation speed of the main stirring paddle and the auxiliary stirring paddle to improve the mixing effect of the solution;

[0023] S4: Use pH test paper to test the pH value of the solution. If the pH is too high, adjust it with dilute lactic acid solution; if the pH is too low, adjust it with dilute sodium hydroxide solution;

[0024] S5: The solution is fixed to volume with distilled water, and the pH value of the solution is tested and adjusted at any time during the process to obtain a plating solution;

[0025] S6: Open the control valve, introduce the plating solution into the inner tank of the constant temperature water bath through the discharge pipe, introduce water into the space between the inner tank and the outer cover through the water inlet pipe, start the electric heating tube, heat the water by the electric heating tube, preheat the plating solution inside the inner tank through water heat transfer, monitor the temperature through the temperature sensor, and maintain the temperature between 84℃-88℃;

[0026] S7: Start the driving motor to drive the stirring frame to rotate, so as to stir the water and improve the uniformity of heating the water;

[0027] S8. Immerse the pre-plated and dried sample in the preheated plating solution and plate at a constant temperature for 1 hour.

[0028] Compared with the prior art, the present invention provides a device and method for preparing a SiC composite coating, which has the following beneficial effects:

[0029] (1) The batching mechanism can realize automatic batching of plating solution raw materials, and the stirring mechanism can improve batching efficiency and uniformity;

[0030] (2) Ensure the quality of the plating solution by testing the pH value during the plating solution preparation process and making timely adjustments;

[0031] (3) Constant temperature plating is performed by setting up a constant temperature water bath to avoid problems such as uneven coating or unstable performance caused by temperature fluctuations. Constant temperature helps to evenly distribute the reactants in the plating solution, thereby obtaining a more uniform and smoother coating. Constant temperature plating can reduce the decomposition or instability of the plating solution caused by temperature inappropriateness, thereby reducing the waste and cost of the plating solution. Constant temperature plating helps to reduce the volatilization of the plating solution caused by excessively high temperature, reduce the release of harmful gases, and improve the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the three-dimensional structure of a device for preparing a SiC composite coating proposed by the present invention;

[0033] Figure 2 A schematic cross-sectional view of a device for preparing a SiC composite coating proposed by the present invention;

[0034] Figure 3 for Figure 2 A partial enlarged view of part A;

[0035] Figure 4 for Figure 2 A partial enlarged view of part B;

[0036] Figure 5 This is a schematic diagram of the exploded three-dimensional structure of the constant temperature water bath pot proposed by the present invention;

[0037] Figure 6 This is a schematic diagram of the three-dimensional structure of the stirring mechanism proposed by the present invention;

[0038] Figure 7 A schematic diagram of the three-dimensional structure of the stirring mechanism proposed by the present invention from another perspective;

[0039] Figure 8 It is a three-dimensional structural schematic diagram of the batching mechanism proposed by the present invention.

[0040] In the figure: 1. casing; 2. controller; 201. temperature panel; 202. control switch; 203. high temperature warning light; 3. outer cover; 301. electric heating tube; 302. stirring rack; 303. driving motor; 304. temperature sensor; 4. liner; 5. bracket; 501. support plate; 502. support beam; 503. positioning pin; 6. batching kettle; 601. discharge pipe; 7. stirring main shaft; 701. main stirring paddle; 702. auxiliary stirring paddle; 703. large gear; 704. small gear; 705. stirring auxiliary shaft; 706. stirring motor; 8. batching rack; 801. electronic scale; 802. beaker; 9. connecting plate; 10. card plate; 11. compression spring; 12. pull rod; 13. pull ring. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0042] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0043] Reference Figure 1-8 , a device for preparing a SiC composite coating, comprising:

[0044] A constant temperature water bath, which is used to provide a constant temperature environment for plating. The constant temperature water bath comprises a casing 1, an inner tank 4 and an outer cover 3. The inner tank 4 and the outer cover 3 are both fixedly installed in the casing 1;

[0045] The batching mechanism includes a batching kettle 6, a bracket 5 and a batching rack 8. The batching kettle 6 is detachably mounted in the bracket 5, and both sides of the bottom of the bracket 5 are fixedly connected with support plates 501. The support plates 501 and the batching rack 8 are fixedly mounted on the top of the casing 1. A plurality of electronic scales 801 are arranged on the top of the electronic scales 801. A beaker 802 is arranged on the top of the electronic scales 801. A stirring mechanism is arranged inside the batching kettle 6.

[0046] The stirring mechanism includes a stirring main shaft 7, a stirring motor 706 and multiple stirring sub-shafts 705. The stirring main shaft 7 and the stirring sub-shaft 705 are both rotatably connected to the bottom inner wall of the batching kettle 6, and multiple main stirring paddles 701 are fixedly installed on the outer side of the batching main shaft, multiple sub-stirring paddles 702 are fixedly installed on the outer side of the stirring sub-shaft 705, and a small gear is fixedly connected to the bottom end of the sub-stirring shaft, a large gear 703 is fixedly installed at the bottom end of the stirring main shaft 7, and multiple small gears are meshed with the large gear 703, and the output end of the stirring motor 706 is fixedly connected to the bottom end of one of the stirring sub-shafts 705.

[0047] In this embodiment, a mounting frame is fixedly installed on one side of the stirring motor 706, and the mounting frame is fixedly installed on the bottom of the batching kettle 6;

[0048] The bottom of the batching kettle 6 is connected to a discharge pipe 601 , and a control valve is arranged in the discharge pipe 601 .

[0049] In this embodiment, connecting plates 9 are slidably sleeved on both sides of the bracket 5, and the sides of the two connecting plates 9 close to each other are fixedly connected with clamping plates 10. Clamping slots are provided on both sides of the batching kettle 6, and the two clamping plates 10 are movably clamped in the corresponding clamping slots respectively; a compression spring 11 and a pull rod 12 are fixedly connected to the other side of the connecting plate 9, and the other end of the compression spring 11 is fixedly connected to the corresponding support plate 501, so as to reset the connecting plate 9, and the pull rod 12 is slidably connected in the corresponding support plate 501 to guide the pull rod 12, and the other end of the pull rod 12 is fixedly connected with a pull ring 13 to facilitate pulling the connecting plate 9 to move.

[0050] In this embodiment, a plurality of positioning pins 503 are fixedly installed inside the bracket 5, and a plurality of pin grooves are opened at the bottom of the batching kettle 6. The positioning pins 503 are movably inserted in the corresponding pin grooves to position the batching kettle 6. A driving motor 303 is fixedly installed on the bottom inner wall of the casing 1, and the output shaft of the driving motor 303 extends between the outer cover 3 and the inner tank 4 and is fixedly connected to the stirring frame 302. The electric heating pipe 301 is fixedly connected to the bottom inner wall of the outer cover 3, and reinforcement plates are fixedly connected to both sides of the bottom of the outer cover 3, and the bottom of the reinforcement plate is fixedly connected to the top inner wall of the casing 1.

[0051] In this embodiment, the outer side of the outer cover 3 is connected with a water inlet pipe and a water outlet pipe, and a temperature sensor 304 is fixedly installed on the inner wall of the outer cover 3, so that the temperature monitoring work can be realized.

[0052] In this embodiment, a controller 2 is fixedly mounted on one side of the housing 1, and the controller 2 is electrically connected to the temperature sensor 304, the stirring motor 706 and the driving motor 303, so as to facilitate automatic control through the controller 2;

[0053] A temperature panel 201 , a high temperature warning light 203 and a control switch 202 are provided on the front side of the controller 2 .

[0054] In this embodiment, support beams 502 are fixedly installed on both the front and rear sides of the bracket 5 , and the support beams 502 are fixedly installed on the top of the housing 1 .

[0055] The present invention also provides a method for preparing a SiC composite coating, comprising the following steps:

[0056] S1: Rinse the beaker 802 and the batching kettle 6 with deionized water, put 5 parts of SiC micro-nano powder, 25 parts of nickel sulfate, 23 parts of sodium bicarbonate, 27 parts of sodium hypophosphite, 1 part of sodium fluoride, and 2 parts of stabilizer into each beaker 802, weigh and confirm using an electronic scale 801, take 2 parts of lactic acid solution, and dissolve them with a small amount of distilled water or deionized water respectively;

[0057] S2: slowly add a small amount of sodium bicarbonate solution into the batching kettle 6, start the stirring motor 706 to drive one of the stirring secondary shafts 705 to rotate, and drive the large gear 703 and the stirring main shaft 7 to rotate through the meshing of the corresponding small gear and the large gear 703, and the large gear 703 drives the other stirring secondary shafts 705 to rotate through the meshing with other small gears, thereby driving the main stirring paddle 701 and the auxiliary stirring paddle 702 to rotate, so as to achieve stirring of the solution, and pour the completely dissolved nickel sulfate solution after the bubbles dissipate;

[0058] S3: Pour SiC micro-nano powder and fully dissolved sodium hypophosphite solution, sodium fluoride and stabilizer into the batching kettle 6, and control the output shaft of the driving motor 303 to accelerate the rotation, thereby increasing the rotation speed of the main stirring paddle 701 and the auxiliary stirring paddle 702 to improve the mixing effect of the solution;

[0059] S4: Use pH test paper to test the pH value of the solution. If the pH is too high, adjust it with dilute lactic acid solution; if the pH is too low, adjust it with dilute sodium hydroxide solution;

[0060] S5: The solution is fixed to volume with distilled water, and the pH value of the solution is tested and adjusted at any time during the process to obtain a plating solution;

[0061] S6: Open the control valve, introduce the plating solution into the inner tank 4 of the constant temperature water bath pot through the discharge pipe 601, introduce water into the space between the inner tank 4 and the outer cover 3 through the water inlet pipe, start the electric heating tube 301, the electric heating tube 301 generates heat to heat the water, and preheats the plating solution inside the inner tank 4 through water heat transfer, and monitors the temperature through the temperature sensor 304 to maintain the temperature between 84°C and 88°C;

[0062] S7: starting the driving motor 303 to drive the stirring frame 302 to rotate, so as to stir the water and improve the uniformity of heating the water;

[0063] S8. Immerse the pre-plated and dried sample in the preheated plating solution and plate at a constant temperature for 1 hour.

[0064] In this embodiment, the automatic dosing of the plating solution raw materials can be achieved through the provided dosing mechanism, and the dosing efficiency and uniformity can be improved through the provided stirring mechanism. The pH value is detected during the plating solution preparation process and timely adjusted to ensure the quality of the plating solution preparation. Constant temperature plating is performed by using a constant temperature water bath to avoid problems such as uneven coating or unstable performance due to temperature fluctuations. The constant temperature helps to evenly distribute the reactants in the plating solution, thereby obtaining a more uniform and smoother coating. The decomposition or instability of the plating solution due to unsuitable temperature can be reduced, thereby reducing the waste and cost of the plating solution. Constant temperature plating helps to reduce the volatilization of the plating solution due to excessively high temperature, reduce the release of harmful gases, and improve the working environment.

[0065] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the instructions and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. Machinery, parts and equipment all adopt conventional models in the prior art, and the circuit connection adopts the conventional connection method in the prior art, which will not be described in detail here.

Claims

1. A device for preparing a SiC composite coating, characterized in that: include: A constant temperature water bath, the constant temperature water bath is used to provide a constant temperature environment for plating, the constant temperature water bath comprises a casing (1), an inner liner (4) and an outer cover (3), the inner liner (4) and the outer cover (3) are both fixedly mounted in the casing (1); A batching mechanism, the batching mechanism comprising a batching kettle (6), a bracket (5) and a batching rack (8), the batching kettle (6) being detachably mounted in the bracket (5), and both sides of the bottom of the bracket (5) being fixedly connected with support plates (501), the support plates (501) and the batching rack (8) being fixedly mounted on the top of the housing (1), a plurality of electronic scales (801) being arranged on the top of the electronic scales (801), a beaker (802) being arranged on the top of the electronic scales (801), and a stirring mechanism being arranged inside the batching kettle (6); The stirring mechanism comprises a stirring main shaft (7), a stirring motor (706) and a plurality of stirring secondary shafts (705), wherein the stirring main shaft (7) and the stirring secondary shaft (705) are both rotatably connected to the inner wall of the bottom of the batching kettle (6), and a plurality of main stirring paddles (701) are fixedly mounted on the outer side of the batching main shaft, a plurality of secondary stirring paddles (702) are fixedly mounted on the outer side of the stirring secondary shaft (705), a small gear is fixedly mounted on the bottom end of the secondary stirring shaft, a large gear (703) is fixedly mounted on the bottom end of the stirring main shaft (7), and the plurality of small gears are meshed with the large gear (703), and the output end of the stirring motor (706) is fixedly connected to the bottom end of one of the stirring secondary shafts (705).

2. The device for preparing SiC composite coating according to claim 1, characterized in that: A mounting frame is fixedly mounted on one side of the stirring motor (706), and the mounting frame is fixedly mounted on the bottom of the batching kettle (6); The bottom of the batching kettle (6) is connected to a discharge pipe (601), and a control valve is arranged in the discharge pipe (601).

3. The device for preparing SiC composite coating according to claim 1, characterized in that: Both sides of the bracket (5) are slidably sleeved with connecting plates (9), and the two connecting plates (9) are fixedly connected with a clamping plate (10) on the sides close to each other. Both sides of the batching kettle (6) are provided with clamping grooves, and the two clamping plates (10) are movably clamped in the corresponding clamping grooves respectively. A compression spring (11) and a pull rod (12) are fixedly connected to the other side of the connecting plate (9); the other end of the compression spring (11) is fixedly connected to the corresponding support plate (501), and the pull rod (12) is slidably connected in the corresponding support plate (501); and the other end of the pull rod (12) is fixedly connected to a pull ring (13).

4. The device for preparing SiC composite coating according to claim 1, characterized in that: A plurality of positioning pins (503) are fixedly installed inside the bracket (5), and a plurality of pin grooves are provided at the bottom of the batching kettle (6), and the positioning pins (503) are movably inserted into the corresponding pin grooves.

5. The device for preparing SiC composite coating according to claim 1, characterized in that: A driving motor (303) is fixedly mounted on the bottom inner wall of the casing (1); an output shaft of the driving motor (303) extends between the outer cover (3) and the inner container (4) and is fixedly connected to a stirring frame (302); an electric heating pipe (301) is fixedly connected to the bottom inner wall of the outer cover (3); and reinforcing plates are fixedly connected to both sides of the bottom of the outer cover (3); the bottom of the reinforcing plates is fixedly connected to the top inner wall of the casing (1).

6. The device for preparing SiC composite coating according to claim 1, characterized in that: The outer side of the outer cover (3) is connected to a water inlet pipe and a water outlet pipe, and a temperature sensor (304) is fixedly mounted on the inner wall of the outer cover (3).

7. The device for preparing SiC composite coating according to claim 6, characterized in that: A controller (2) is fixedly mounted on one side of the housing (1), and the controller (2) is electrically connected to the temperature sensor (304), the stirring motor (706) and the driving motor (303); The front side of the controller (2) is provided with a temperature panel (201), a high temperature warning light (203) and a control switch (202).

8. The device for preparing SiC composite coating according to claim 1, characterized in that: Support beams (502) are fixedly mounted on both the front and rear sides of the bracket (5), and the support beams (502) are fixedly mounted on the top of the housing (1).

9. A method for preparing a SiC composite coating, characterized in that: The following steps are involved: S1: Rinse the beaker (802) and the batching kettle (6) with deionized water, put 1-5 parts of SiC micro-nano powder, 25 parts of nickel sulfate, 20-23 parts of sodium bicarbonate, 27 parts of sodium hypophosphite, 1 part of sodium fluoride, and 1-2 parts of stabilizer into each beaker (802), weigh and confirm using an electronic scale (801), take 2 parts of lactic acid solution, and dissolve them with a small amount of distilled water or deionized water respectively; S2: slowly adding a small amount of sodium bicarbonate solution into the batching kettle (6) several times, starting the stirring motor (706) to drive one of the stirring secondary shafts (705) to rotate, and driving the large gear (703) and the stirring main shaft (7) to rotate through the meshing of the corresponding small gear and the large gear (703), and the large gear (703) drives the other stirring secondary shafts (705) to rotate through the meshing with other small gears, thereby driving the main stirring paddle (701) and the auxiliary stirring paddle (702) to rotate, so as to achieve stirring of the solution, and pouring the completely dissolved nickel sulfate solution after the bubbles dissipate; S3: Pour SiC micro-nano powder and fully dissolved sodium hypophosphite solution, sodium fluoride and stabilizer into a batching kettle (6), and control the output shaft of the driving motor (303) to accelerate the rotation, thereby increasing the rotation speed of the main stirring paddle (701) and the auxiliary stirring paddle (702) to improve the mixing effect of the solution; S4: Use pH test paper to test the pH value of the solution. If the pH is too high, adjust it with dilute lactic acid solution; if the pH is too low, adjust it with dilute sodium hydroxide solution; S5: The solution is fixed to volume with distilled water, and the pH value of the solution is tested and adjusted at any time during the process to obtain a plating solution; S6: Open the control valve, introduce the plating solution into the inner tank (4) of the constant temperature water bath pot through the discharge pipe (601), introduce water into the space between the inner tank (4) and the outer cover (3) through the water inlet pipe, start the electric heating tube (301), the electric heating tube (301) generates heat to heat the water, and preheats the plating solution inside the inner tank (4) through water heat transfer, and monitors the temperature through the temperature sensor (304) to maintain the temperature between 84°C and 88°C; S7: starting the driving motor (303) to drive the stirring frame (302) to rotate, thereby stirring the water and improving the uniformity of heating the water; S8. Immerse the pre-plated and dried sample in the preheated plating solution and plate at a constant temperature for 1 hour.

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