High-wear-resistance pole lug reinforcing rib pressing wheel with diamond coating and manufacturing method of high-wear-resistance pole lug reinforcing rib pressing wheel

Abstract

The invention discloses a high-wear-resistance pole lug reinforcing rib pressing wheel with a diamond coating and a manufacturing method thereof, and the high-wear-resistance pole lug reinforcing rib pressing wheel with the diamond coating comprises a pressing wheel body, a boriding transition layer prepared on the surface of a substrate of the pressing wheel body, and the diamond coating deposited on the surface of the boriding transition layer, and the thickness of the diamond coating is smaller than that of the boriding transition layer. According to the process for directly preparing the diamond coating by adopting a gas boriding-chemical vapor deposition method, a container replacement step between the two processes is removed, so that personal errors during container replacement are avoided, the stability of coating preparation is improved, quenching and tempering treatment after boriding of a steel material substrate is reduced, and the service life of the coating is prolonged. And the problems of deformation of the pinch roller caused by heat treatment and the like are avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of ear reinforcing rib pressing wheels, and particularly to a highly wear-resistant ear reinforcing rib pressing wheel with a diamond coating and a manufacturing method thereof. Background Art

[0002] In industrial production such as lithium battery manufacturing, copper foil is often used as the negative electrode current collector material of the battery. With the gradual progress of the new energy power lithium battery industry towards high energy density, the negative electrode copper foil current collector develops towards high-performance trends such as ultra-thin and high mechanical properties. After the negative electrode pole piece undergoes the die-cutting process, the ear is usually cut into various shapes such as rectangular and trapezoidal; however, due to the soft texture of the copper foil, the negative electrode ear is prone to folding, deformation, and collapse during the production process, affecting the product yield.

[0003] Generally, in order to improve the support strength of the negative electrode ear, an ear reinforcing rib device is used before die-cutting, and reinforcing ribs are pressed out in the ear area through a pressing wheel and a stamping roller to improve the anti-folding, deformation, and collapse resistance of the ear. Generally, carbon steel and stainless steel are mostly used as the manufacturing materials for the ear reinforcing rib pressing wheel, and it is difficult to further improve the hardness and wear and friction reduction performance of the pressing wheel with ordinary surface treatment processes. During the long-term production process, due to the severe wear of the pressing wheel, it is easy to press through the ear, affecting the quality of the ear reinforcing rib, and replacing the pressing wheel will also affect the production efficiency.

[0004] Since the ear reinforcing rib pressing wheel will be worn and corroded during repeated use, the performance of the ear reinforcing rib pressing wheel is affected. Therefore, it is necessary to improve the pressing wheel. Summary of the Invention

[0005] The purpose of the present invention is to overcome the poor wear resistance of the ear reinforcing rib pressing wheel in the prior art, and provide a diamond-coated ear reinforcing rib pressing wheel and a manufacturing method thereof.

[0006] An object of the present invention is to provide a highly wear-resistant ear reinforcing rib pressing wheel with a diamond coating, including a pressing wheel body, a boronizing transition layer prepared on the substrate surface of the pressing wheel body, and a diamond coating deposited on the surface of the boronizing transition layer, wherein the thickness of the diamond coating is less than the thickness of the boronizing transition layer.

[0007] Preferably, the boronizing transition layer and the diamond coating are respectively prepared by gas boronizing method and hot wire chemical vapor deposition method in the same reaction chamber.

[0008] Preferably, the thickness of the boronizing transition layer is 10 - 100 μm.

[0009] Preferably, the thickness of the diamond coating is 1.5 - 4 μm, wherein the content of carbon atoms combined in the SP 3 hybrid orbital mode is greater than 99%.

[0010] Preferably, the pressing wheel body is made of steel or steel-based alloy materials.

[0011] Another object of the present invention is to provide a manufacturing method of a highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating, including:

[0012] Clean the pressing wheel body to remove surface oil stains and impurities, ensure that the cleanliness of the substrate surface meets the preset requirements, and then dry it:

[0013] In the reaction chamber, a boronized transition layer is prepared on the surface of the dried pressing wheel body by using a gas boronizing process;

[0014] After the boronized transition layer is prepared, introduce a protective gas into the reaction chamber, cool the pressing wheel body to the preset temperature, use the protective gas to purge, and discharge the reaction gas inside the reaction chamber to complete. Then, directly use the hot filament chemical vapor deposition method to deposit a diamond coating on the surface of the boronized transition layer in the reaction chamber.

[0015] Preferably, the method of preparing the boronized transition layer on the surface of the dried pressing wheel body by using the gas boronizing process includes:

[0016] Continuously introduce the mixed gas formed by BCL3 and H2 into the purged reaction chamber, and maintain the reaction chamber at atmospheric pressure. Heat the temperature of the reaction chamber to 750 - 850 °C at a preset heating rate and keep it warm to form a uniform and dense boronized transition layer on the surface of the pressing wheel body; preferably, the oxygen content in the reaction chamber is less than 10 ppm, and the volume ratio of BCL3 / H2 in the mixed gas is 1%.

[0017] Preferably, the heat preservation time is 3.5 - 4.5 h, the total gas flow rate of the mixed gas introduced into the reaction chamber is controlled at 500 sccm, and the heating rate is 10 °C / min.

[0018] Preferably, in the reaction chamber, directly use the hot filament chemical vapor deposition method to deposit a diamond coating on the surface of the boronized transition layer, including:

[0019] Use methane and hydrogen as reactant materials, and use multiple tantalum wires as excitation hot filaments for depositing the diamond coating;

[0020] Stop deposition after depositing for a preset time, cool it to room temperature in a vacuum environment, and obtain the required diamond coating on the surface of the boronized transition layer;

[0021] Preferably, in the deposition of the diamond coating, the reaction pressure is 6 Torr, the tantalum wire temperature is in the range of 1900 - 2300 °C, and the deposition temperature is in the range of 700 - 800 °C; a DC positive bias voltage is applied between the heated filament and the substrate to enhance nucleation; the gas flow rates of methane and hydrogen are maintained at 2 - 4 sccm and 180 - 200 sccm, respectively.

[0022] Preferably, when cleaning the counter pressure wheel body, it is ultrasonically cleaned in an ethanol solution, then cleaned with deionized water, and then dried for standby.

[0023] The present invention relates to a highly wear-resistant tab reinforcing rib pressure wheel with a diamond coating, which optimizes the gas boronizing process and the hot filament chemical vapor deposition (CVD) method. A diamond coating is continuously prepared on the pressure wheel with a boronizing transition layer (Fe-B compound as the transition layer), significantly improving the adhesion of the diamond coating on the steel substrate, eliminating the post-treatment of gas boronizing and the pre-treatment before the diamond coating, and optimizing the diamond coating preparation process; this manufacturing method is applicable to tab reinforcing rib pressure wheels of various metal materials, greatly improving the wear resistance of the tab reinforcing rib pressure wheel and at the same time increasing the service life of the tab reinforcing rib pressure wheel. Brief Description of the Drawings

[0024] Figure 1 is a schematic diagram of a highly wear-resistant tab reinforcing rib pressure wheel with a diamond coating according to an embodiment of the present invention.

[0025] Figure 2 is a cross-sectional schematic diagram of a highly wear-resistant tab reinforcing rib pressure wheel with a diamond coating according to an embodiment of the present invention.

[0026] Figure 3 is a schematic diagram of the indentation morphology of the pressure wheel of the comparative example.

[0027] Figure 4 is a schematic diagram of the indentation morphology of the pressure wheel of Embodiment 1 of the present invention.

[0028] Figure 5 is a flowchart of the manufacturing method of a highly wear-resistant tab reinforcing rib pressure wheel with a diamond coating according to an embodiment of the present invention.

[0029] In the figure:

[0030] 1. Highly wear-resistant tab reinforcing rib pressure wheel with a diamond coating; 2. Substrate; 3. Boronizing transition layer; 4. Diamond coating. Detailed Description of the Embodiments

[0031] The following further elaborates on the present invention in detail with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] In an exemplary embodiment of the present application, the highly wear-resistant tab reinforcing rib press wheel 1 with a diamond coating includes a press wheel body, a boronized transition layer 3 prepared on the surface of the base 2 on the outer peripheral surface of the press wheel body, and a diamond coating 4 deposited on the outer peripheral surface of the boronized transition layer.

[0033] In an exemplary embodiment, the boronized transition layer and the diamond coating are respectively prepared by gas boronizing and hot filament chemical vapor deposition in the same reaction chamber.

[0034] In an exemplary embodiment, the boronized transition layer, that is, the Fe-B compound transition layer, has a uniform thickness, and the diamond coating has a uniform thickness.

[0035] In an exemplary embodiment, the material of the above press wheel body is a steel or steel alloy material.

[0036] In an exemplary embodiment, the thickness of the boronized transition layer (Fe-B compound transition layer) is 10 - 100 μm; the thickness of the diamond coating is 1.5 - 4 μm, wherein the content of carbon atoms combined in the SP 3 hybrid orbital mode is greater than 99%.

[0037] In an exemplary embodiment, as shown in Figure 5 , a method for manufacturing a highly wear-resistant tab reinforcing rib press wheel with a diamond coating is also provided, including:

[0038] S1. Clean the press wheel body to remove surface oil stains and impurities, ensure that the cleanliness of the base surface meets the preset requirements, and then dry it:

[0039] S2. In the reaction chamber, use the gas boronizing process to prepare a boronized transition layer on the surface of the dried press wheel body;

[0040] S3. After the boronized transition layer is prepared, introduce a protective gas into the reaction chamber, cool the press wheel body to the preset temperature, use the protective gas to purge, and discharge the internal reaction gas of the reaction chamber. Then, directly use the hot filament chemical vapor deposition method in the reaction chamber to deposit a diamond coating on the surface of the boronized transition layer.

[0041] The embodiment of the present application can continuously prepare a boronized transition layer and a diamond coating on a steel material press wheel by gas boronizing - hot filament chemical vapor deposition in the same reaction chamber, so that the surface of the tab reinforcing rib press wheel has the excellent hardness and wear and friction reduction performance of the diamond coating.

[0042] In an exemplary embodiment, when cleaning the base, the pressing wheel body is ultrasonically cleaned in an ethanol solution for more than 15 minutes, then cleaned with deionized water for more than 10 minutes, dried and reserved. Oil stains and impurities are removed to ensure the cleanliness of the base surface. For the cleaned pressing wheel body, it is dried and reserved. Regarding the cleaning method, other methods can also be used for cleaning, not limited to this.

[0043] In an exemplary embodiment, a boronized transition layer (Fe-B compound transition layer) is prepared on the surface of the pressing wheel body by a gas boronizing process. The mixed gas formed by BCL3 and H2 is continuously introduced into the purged reaction chamber, and the reaction chamber is maintained at normal pressure. The temperature of the reaction chamber is raised to 750 - 850 °C at a preset heating rate and held for heat preservation, and a uniform and dense boronized transition layer is formed on the surface of the pressing wheel body.

[0044] Exemplarily and preferably, the oxygen content in the reaction chamber is lower than a preset value, such as 10 ppm, and the volume ratio of BCL3 / H2 in the mixed gas is 1%.

[0045] Exemplarily and preferably, the heat preservation time is 3.5 - 4.5 h, the total gas flow rate of the mixed gas introduced into the reaction chamber is controlled at 500 sccm, and the heating rate is 10 °C / min.

[0046] Among them, introducing a protective gas into the reaction chamber to cool the pressing wheel body to a preset temperature and using the protective gas to purge to discharge the reaction gas inside the reaction chamber can be achieved by introducing nitrogen. For example, after stopping heating, nitrogen is introduced into the reaction chamber (flow rate 300 sccm) to be forcibly cooled to below 100 °C, and nitrogen purging is maintained for 10 minutes to completely discharge the residual gas, and then the diamond coating is continuously deposited.

[0047] In an exemplary embodiment, in the reaction chamber, a diamond coating is directly deposited on the boronized transition layer by a hot filament chemical vapor deposition method, including:

[0048] Using methane and hydrogen as reactant materials and using multiple tantalum wires as excitation hot filaments for depositing the diamond coating;

[0049] After depositing for a preset time, the deposition is stopped, and it is cooled to room temperature in a vacuum environment, and the required diamond coating is obtained on the surface of the boronized transition layer;

[0050] In an exemplary embodiment, during the deposition of the diamond coating, the reaction pressure is 6 Torr, the tantalum wire temperature is 1900 - 2300 °C, and the deposition temperature is in the range of 700 - 800 °C; a DC positive bias voltage is applied between the excitation hot filament and the substrate to enhance nucleation; the gas flow rates of methane and hydrogen are respectively maintained at 2 - 4 sccm and 180 - 200 sccm.

[0051] Preferably, in the embodiments of the present application, the roller body in the reaction chamber is not taken out, and the diamond coating is directly deposited on the boronized transition layer surface by the hot filament chemical vapor deposition method.

[0052] Exemplarily, there are 6 tantalum wires with a diameter of 0.6 mm, and a DC positive bias voltage with a current of 4 A is applied between the excited hot wire and the substrate to enhance nucleation.

[0053] Exemplarily, the deposition time is 5 h. After the deposition is stopped, it is cooled in the vacuum reaction chamber for 1 h to room temperature, and the required diamond coating is obtained on the surface of the boronized transition layer (Fe-B compound transition layer).

[0054] Example 1:

[0055] The production of a highly wear-resistant tab reinforcing rib roller with a diamond coating is carried out by the following steps:

[0056] Step 1. Substrate cleaning:

[0057] The roller body of 45 steel (outer diameter Ф56 mm: height Ф28 mm: inner diameter 50 mm) is immersed in 200 mL of ethanol solution with a concentration of 99.7% for ultrasonic cleaning for 20 min, and then transferred to a deionized water tank for ultrasonic cleaning for 15 min. After cleaning, it is taken out and dried in a temperature oven at 100 °C for 30 min for standby, ensuring that there is no residual water stain or oil stain on the surface, and the steel substrate before gas boronizing and diamond coating deposition is obtained;

[0058] Step 2. Gas boronizing to prepare a boronized transition layer (Fe-B compound transition layer):

[0059] The cleaned and dried roller body is placed on the workbench in the reaction chamber, and the reaction chamber is purged with high-purity nitrogen 3 times to ensure that the oxygen content is less than 10 ppm. Subsequently, a mixed gas of BCL3 / H2 with a volume ratio of 1% is introduced, and the total gas flow rate is controlled at 500 sccm, and the pressure of the reaction chamber is maintained at normal pressure. It is heated to 820 °C at a rate of 10 °C / min and held for 4 h. During this period, the mixed gas is continuously introduced to ensure that a uniform and dense boronized transition layer (Fe-B compound transition layer) is formed on the surface, with a thickness of about 25 μm.

[0060] Step 3. Hot wire CVD deposition of diamond coating:

[0061] After the boronizing transition layer is prepared, introduce a protective gas (such as nitrogen) into the reaction chamber, cool the pressure wheel body to a preset temperature, such as about 90 °C, and use the protective gas to purge to exhaust the reaction gas inside the reaction chamber completely. Keep the pressure wheel body in the reaction chamber, install 6 parallel tantalum wires at a distance of 6 mm from the substrate surface. The diameter of the tantalum wire is 0.6 mm, and the spacing is 8 mm. Introduce hydrogen at a flow rate of 50 sccm, the reaction pressure is 6 Torr, the temperature of the tantalum wire is 2200 °C, the substrate temperature is kept at 750 °C, and apply a DC positive bias voltage with a current of 4 A. Introduce a CH4 / H2 mixed gas (CH4 flow rate 3 sccm, H2 flow rate 190 sccm), and the total gas flow rate is 193 sccm. After continuous deposition for 5 h, turn off the hot wire power supply, stop introducing the reaction gas, and naturally cool to room temperature (about 1 h) in a vacuum environment. Finally, obtain a continuous diamond coating with a thickness of about 4 μm.

[0062] Example 2:

[0063] To fabricate a highly wear-resistant tab reinforcing rib pressure wheel with a diamond coating, the following steps are adopted:

[0064] Step 1. Substrate cleaning:

[0065] Immerse the pressure wheel body made of 45 steel (outer diameter Ф56 mm: height Ф28 mm: inner diameter 50 mm) in 200 mL of ethanol solution with a concentration of 99.7% for ultrasonic cleaning for 20 min, then transfer it to a deionized water tank for ultrasonic cleaning for 15 min. After cleaning, take it out and dry it in a temperature oven at 100 °C for 30 min for standby, ensuring that there is no residual water stain or oil stain on the surface, and obtain the steel substrate before gas boronizing and depositing the diamond coating.

[0066] Step 2. Gas boronizing to prepare a boronizing transition layer (Fe-B compound transition layer):

[0067] Place the cleaned and dried pressure wheel body on the workbench in the reaction chamber, purge the reaction chamber with high-purity nitrogen 3 times to ensure that the oxygen content is lower than 10 ppm. Then introduce a BCL3 / H2 mixed gas with a volume ratio of 1%, and control the total gas flow rate at 500 sccm, and maintain the pressure of the reaction chamber at atmospheric pressure. Heat up to 750 °C at a rate of 10 °C / min and keep it warm for 3.5 h. During this period, continuously introduce the mixed gas to ensure that a uniform and dense boronizing transition layer (Fe-B compound transition layer) is formed on the surface, with a thickness of about 80 μm.

[0068] Step 3. Hot wire CVD deposition of diamond coating:

[0069] After the boronizing transition layer is prepared, a protective gas (such as nitrogen) is introduced into the reaction chamber, the roller body is cooled to a preset temperature, such as about 85 °C, and purged with the protective gas to exhaust the reaction gas inside the reaction chamber completely. Keep the roller body in the reaction chamber, install 6 parallel tantalum wires at a distance of 6 mm from the substrate surface, the diameter of the tantalum wire is 0.6 mm, and the spacing is 8 mm. Hydrogen is introduced at a flow rate of 50 sccm, the reaction pressure is 6 Torr, the temperature of the tantalum wire is 2000 °C, the substrate temperature is maintained at 780 °C, and a DC positive bias voltage with a current of 4 A is applied. A CH4 / H2 mixed gas (CH4 flow rate 2.5 sccm, H2 flow rate 180 sccm) is introduced, and the total gas flow rate is 182.5 sccm. After continuous deposition for 5 h, the hot wire power supply is turned off, the reaction gas supply is stopped, and it is naturally cooled to room temperature (about 1 h) in a vacuum environment. Finally, a continuous diamond coating with a thickness of about 2.5 μm is obtained.

[0070] Example 3:

[0071] To fabricate a highly wear-resistant tab reinforcing rib roller with a diamond coating, the following steps are adopted:

[0072] Step 1. Substrate cleaning:

[0073] Immerse the roller body of 45 steel (outer diameter Ф56 mm: height Ф28 mm: inner diameter 50 mm) in 200 mL of ethanol solution with a concentration of 99.7% for ultrasonic cleaning for 20 min, then transfer it to a deionized water tank for ultrasonic cleaning for 15 min. After cleaning, take it out and dry it in a temperature oven at 100 °C for 30 min for standby, ensuring that there is no residual water stain or oil stain on the surface, and obtain the steel substrate before gas boronizing and diamond coating deposition.

[0074] Step 2. Gas boronizing to prepare a boronizing transition layer (Fe-B compound transition layer):

[0075] Place the cleaned and dried roller body on the workbench in the reaction chamber, purge the reaction chamber with high-purity nitrogen 3 times to ensure that the oxygen content is less than 10 ppm. Then introduce a BCL3 / H2 mixed gas with a volume ratio of 1%, and control the total gas flow rate at 500 sccm, maintaining the pressure of the reaction chamber at atmospheric pressure. Heat it up to 850 °C at a rate of 10 °C / min and keep it warm for 4.5 h. During this period, continuously introduce the mixed gas to ensure that a uniform and dense boronizing transition layer (Fe-B compound transition layer) is formed on the surface, with a thickness of about 100 μm.

[0076] Step 3. Hot wire CVD deposition of diamond coating:

[0077] After the boronizing transition layer is prepared, introduce a protective gas (such as nitrogen) into the reaction chamber, cool the roller body to a preset temperature, such as about 95 °C, and purge with the protective gas to completely discharge the reaction gas inside the reaction chamber. Keep the roller body in the reaction chamber, install 6 parallel tantalum wires at a distance of 6 mm from the substrate surface, with a tantalum wire diameter of 0.6 mm and a spacing of 8 mm. Introduce hydrogen at a flow rate of 50 sccm, with a reaction pressure of 6 Torr, a tantalum wire temperature of 1900 °C, a substrate temperature maintained at 700 °C, and apply a DC positive bias voltage with a current of 4 A. Introduce a CH4 / H2 mixed gas (CH4 flow rate 2 sccm, H2 flow rate 200 sccm), and the total gas flow rate is 202 sccm. After continuous deposition for 5 h, turn off the hot wire power supply, stop introducing the reaction gas, and naturally cool to room temperature (about 1 h) in a vacuum environment. Finally, obtain a continuous diamond coating with a thickness of about 3 μm.

[0078] Example 4:

[0079] To fabricate a highly wear-resistant tab reinforcing rib roller with a diamond coating, the following steps are adopted:

[0080] Step 1. Substrate cleaning:

[0081] Immerse the roller body made of 45 steel (outer diameter Ф56 mm: height Ф28 mm: inner diameter 50 mm) in 200 mL of ethanol solution with a concentration of 99.7% for ultrasonic cleaning for 20 min, then transfer it to a deionized water tank for ultrasonic cleaning for 15 min. After cleaning, take it out and dry it in a temperature oven at 100 °C for 30 min for standby, ensuring that there is no residual water stain or oil stain on the surface, and obtain the steel substrate before gas boronizing and depositing the diamond coating.

[0082] Step 2. Gas boronizing to prepare a boronizing transition layer (Fe-B compound transition layer):

[0083] Place the cleaned and dried roller body on the workbench in the reaction chamber, purge the reaction chamber with high-purity nitrogen 3 times to ensure that the oxygen content is less than 10 ppm. Then introduce a BCL3 / H2 mixed gas with a volume ratio of 1%, and control the total gas flow rate at 500 sccm, maintaining the reaction chamber pressure at atmospheric pressure. Heat up to 800 °C at a rate of 10 °C / min and hold for 3.5 h, continuously introducing the mixed gas during this period to ensure that a uniform and dense boronizing transition layer (Fe-B compound transition layer) with a thickness of about 10 μm is formed on the surface.

[0084] Step 3. Hot wire CVD deposition of diamond coating:

[0085] After the boronizing transition layer is prepared, introduce a protective gas (such as nitrogen) into the reaction chamber, cool the roller body to a preset temperature, such as about 95 °C, and use the protective gas to purge to exhaust the reaction gas inside the reaction chamber completely. Keep the roller body in the reaction chamber, install 6 parallel tantalum wires at a distance of 6 mm from the substrate surface. The diameter of the tantalum wire is 0.6 mm, and the spacing is 8 mm. Introduce hydrogen at a flow rate of 50 sccm, the reaction pressure is 6 Torr, the temperature of the tantalum wire is 2100 °C, the substrate temperature is maintained at 750 °C, and apply a DC positive bias voltage with a current of 4 A. Introduce a CH4 / H2 mixed gas (CH4 flow rate 4 sccm, H2 flow rate 190 sccm), and the total gas flow rate is 194 sccm. After continuous deposition for 5 h, turn off the hot wire power supply, stop introducing the reaction gas, and naturally cool to room temperature (about 1 h) in a vacuum environment. Finally, a continuous diamond coating with a thickness of about 1.5 μm is obtained.

[0086] Example 5:

[0087] To fabricate a highly wear-resistant tab reinforcing rib roller with a diamond coating, the following steps are adopted:

[0088] Step 1. Substrate cleaning:

[0089] Immerse the roller body made of 45 steel (outer diameter Ф56 mm: height Ф28 mm: inner diameter 50 mm) in 200 mL of ethanol solution with a concentration of 99.7% for ultrasonic cleaning for 20 min, then transfer it to a deionized water tank for ultrasonic cleaning for 15 min. After cleaning, take it out and dry it in a temperature oven at 100 °C for 30 min for standby, ensuring that there is no residual water stain or oil stain on the surface, and obtain the steel substrate before gas boronizing and depositing the diamond coating.

[0090] Step 2. Gas boronizing to prepare a boronizing transition layer (Fe-B compound transition layer):

[0091] Place the cleaned and dried roller body on the workbench in the reaction chamber, purge the reaction chamber 3 times with high-purity nitrogen to ensure that the oxygen content is less than 10 ppm. Then introduce a BCL3 / H2 mixed gas with a volume ratio of 1%, and control the total gas flow rate at 500 sccm, and maintain the pressure of the reaction chamber at atmospheric pressure. Heat up to 810 °C at a rate of 10 °C / min and keep it warm for 4.5 h. During this period, continuously introduce the mixed gas to ensure that a uniform and dense boronizing transition layer (Fe-B compound transition layer) is formed on the surface, with a thickness of about 30 μm.

[0092] Step 3. Hot wire CVD deposition of diamond coating:

[0093] After the boronizing transition layer is prepared, introduce a protective gas (such as nitrogen) into the reaction chamber, cool the roller body to a preset temperature, such as about 98 °C, and purge with the protective gas to exhaust the reaction gas inside the reaction chamber. Keep the roller body in the reaction chamber, install 6 parallel tantalum wires at a distance of 6 mm from the substrate surface, with a tantalum wire diameter of 0.6 mm and a spacing of 8 mm. Introduce hydrogen at a flow rate of 50 sccm, with a reaction pressure of 6 Torr, a tantalum wire temperature of 2300 °C, keep the substrate temperature at 800 °C, and apply a DC positive bias voltage with a current of 4 A. Introduce a CH4 / H2 mixed gas (CH4 flow rate of 3.5 sccm and H2 flow rate of 180 sccm), with a total gas flow rate of 183.5 sccm. After continuous deposition for 5 h, turn off the hot wire power supply and stop introducing the reaction gas, and naturally cool to room temperature (about 1 h) in a vacuum environment. Finally, a continuous diamond coating with a thickness of about 3.5 μm is obtained.

[0094] Take the direct deposition of diamond coating on the steel substrate roller by the traditional hot wire chemical vapor deposition method as a comparative example, and then conduct performance comparison and detection on the rollers of the above Example 1 and the comparative example:

[0095] Detection method: Conduct an indentation test using a Rockwell hardness tester (equipped with a 120° conical diamond indenter), apply a load of 60 kg, and evaluate the film-substrate adhesion.

[0096] The comparative analysis of the experimental results is as follows:

[0097] (1) For the steel substrate roller sample without a transition layer: Its indentation morphology is as Figure 3 shown, showing significant interface failure characteristics: There is a spalling area with a diameter of up to 298 ± 5 μm around the indentation, the coating undergoes large-area delamination and peeling, and radial cracks extend, indicating insufficient interface bonding strength.

[0098] (2) For the steel substrate roller sample with a gas boronizing transition layer: As Figure 4 shown, the coating maintains its structural integrity, and only a plastic deformation pit with a diameter of 114 ± 6 μm is formed. Microscopic observation shows that there are limited circumferential cracks (average length < 60 μm) and a small amount of radial microcracks (density < 3 cracks / 100 μm) at the edge of the indentation, and no macroscopic spalling phenomenon is observed, confirming that the transition layer effectively improves the interface bonding strength.

[0099] The tab reinforcing rib roller of the embodiment of the present application has excellent hardness and wear and friction reduction performance, significantly improving the processing quality and service life of the tab reinforcing rib roller.

[0100] The tab reinforcing rib pressing wheel of the embodiment of the present invention solves the problem that due to the differences in the thermal expansion coefficients and lattice constants between the steel material substrate and diamond, there is certain internal stress when the diamond coating is directly deposited on the steel material substrate, resulting in poor coating adhesion and easy peeling, by means of the boronizing transition layer on the steel substrate. The adhesion between the diamond coating and the surface of the steel material substrate is significantly improved.

[0101] The tab reinforcing rib pressing wheel of the embodiment of the present invention adopts the process of directly preparing the diamond coating by gas boronizing - chemical vapor deposition method, removing the container replacement step between the two processes, thus avoiding the human error during container replacement, improving the stability of coating preparation, reducing the quenching and tempering treatment after boronizing of the steel material substrate, and avoiding problems such as deformation of the pressing wheel caused by heat treatment.

[0102] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above - mentioned exemplary embodiments, and without departing from the spirit or basic features of the present invention, the present invention can be implemented in other specific forms.

[0103] Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention.

[0104] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating, characterized in that, It includes a pressing wheel body, a boronized transition layer prepared on the substrate surface of the pressing wheel body, and a diamond coating deposited on the surface of the boronized transition layer, and the thickness of the diamond coating is less than that of the boronized transition layer.

2. The highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 1, characterized in that The boronized transition layer and the diamond coating are respectively prepared by gas boronizing method and hot filament chemical vapor deposition method in the same reaction chamber.

3. The highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 1, characterized in that, The thickness of the boronized transition layer is 10 - 100 μm.

4. The highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 1, characterized in that, The thickness of the diamond coating is 1.5 to 4 μm, wherein the content of carbon atoms combined in the SP 3 hybrid orbital mode is greater than 99%.

5. The highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 1, wherein, The pressing wheel body is made of steel or steel-based alloy material.

6. Method for manufacturing a highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating, characterized in that, It includes: Clean the pressing wheel body to remove surface oil and impurities, ensure that the cleanliness of the substrate surface meets the preset requirements, and then dry it: In the reaction chamber, use the gas boronizing process to prepare a boronized transition layer on the surface of the dried pressing wheel body; After the preparation of the boronized transition layer is completed, introduce a protective gas into the reaction chamber, cool the pressing wheel body to the preset temperature, use the protective gas to purge, and discharge the reaction gas inside the reaction chamber to complete. Then, directly use the hot filament chemical vapor deposition method in the reaction chamber to deposit a diamond coating on the surface of the boronized transition layer.

7. The manufacturing method of the highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 6, characterized in that, The step of using the gas boronizing process to prepare a boronized transition layer on the surface of the dried pressing wheel body includes: Continuously introduce the mixed gas formed by BCL3 and H2 into the purged reaction chamber, and maintain the reaction chamber at atmospheric pressure. Heat the temperature of the reaction chamber to 750 - 850 °C at a preset heating rate and keep it warm to generate a uniform and dense boronized transition layer on the surface of the pressing wheel body; preferably, the oxygen content in the reaction chamber is less than 10 ppm, and the volume ratio of BCL3 / H2 in the mixed gas is 1%.

8. The manufacturing method of the highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 7, characterized in that, The heat preservation time is 3.5 - 4.5 h, the total gas flow rate of the mixed gas introduced into the reaction chamber is controlled at 500 sccm, and the heating rate is 10 °C / min.

9. The manufacturing method of the highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 6, characterized in that, In the reaction chamber, directly use the hot filament chemical vapor deposition method to deposit a diamond coating on the surface of the boronized transition layer, including: Use methane and hydrogen as reactant materials, and use multiple tantalum wires as excitation hot filaments for depositing the diamond coating; Stop deposition after depositing for a preset time, cool it to room temperature in a vacuum environment, and obtain the required diamond coating on the surface of the boronized transition layer; Preferably, in the deposition of the diamond coating, the reaction pressure is 6 Torr, the tantalum wire temperature is 1900 - 2300 °C, and the deposition temperature is in the range of 700 - 800 °C; apply a DC positive bias voltage between the excitation hot filament and the substrate to enhance nucleation; the gas flow rates of methane and hydrogen are respectively maintained at 2 - 4 sccm and 180 - 200 sccm.

10. The manufacturing method of the highly wear-resistant tab reinforcing rib pressing wheel with a diamond coating according to claim 6, characterized in that, When cleaning the pressing wheel body, ultrasonically clean it in an ethanol solution, then clean it with deionized water, and then dry it for standby.

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