Method for improving hardness of cover plate

Abstract

The invention relates to a method for improving hardness of a cover plate, which comprises the following steps: pretreating the surface of the cover plate to remove oil stain and dust on the surface; a titanium nitride layer is sprayed on the surface of the cover plate, and after the titanium nitride layer is sprayed, residual stress in the titanium nitride layer is eliminated through an annealing process; carrying out curing treatment on the cover plate; wherein the technological parameters for spraying the titanium nitride on the surface of the cover plate comprise that the powder feeding amount is set to be 30-40 g / min, the electric power is set to be 20-40 KW, the argon gas flow is set to be 4-5 L / min, the hydrogen gas flow is set to be 1-2 L / min, the spray gun voltage is set to be 50-55 V, and the spray gun current is set to be 200-300 A. Spraying is conducted on the surface through plasma spraying equipment or electric arc spraying equipment, the spraying process is controlled, and the hardness of the cover plate can be improved. After spraying, heating curing or ultraviolet curing is carried out, and it is ensured that the coating can be firmly attached to the surface of the cover plate after curing. Substances such as titanium nitride are sprayed on the surface of the cover plate, so that the hardness of the cover plate is effectively enhanced.

Description

Technical Field

[0001] The invention relates to the technical field of cover plate coating, and in particular to a method for improving the hardness of a cover plate. Background Art

[0002] In many industrial applications, the hardness of the cover plate has an important impact on its performance and service life. However, existing methods for providing the hardness of the cover plate often have problems such as poor effect, high cost, and complex process.

[0003] The Chinese patent "A cover plate CN109650740A" proposes to use vacuum sputtering or magnetron sputtering method for surface coating. The surface of the cover plate is coated with a transparent hardening layer, which can improve the hardness and wear resistance of the cover plate.

[0004] The Chinese patent "A cover plate CN210030456U" proposes sputtering, radio frequency sputtering, high-energy pulse sputtering, and magnetron sputtering methods for coating. The surface of the cover plate is coated with any one or a combination of nitride film layers, nitride carbide film layers, nitride carbon oxide film layers, or diamond-like film layers, which can improve the hardness and wear resistance of the cover plate. Summary of the invention

[0005] The invention provides a method for improving the hardness of a cover plate, in which titanium nitride material is sprayed on the surface of the cover plate to enhance the hardness of the cover plate and improve its wear resistance and scratch resistance.

[0006] Specifically, the present invention provides a method for improving the hardness of a cover plate, comprising:

[0007] Pre-treat the surface of the cover plate to remove surface oil and dust;

[0008] A titanium nitride layer is sprayed on the surface of the cover plate, and after the titanium nitride layer is sprayed, an annealing process is performed to eliminate the residual stress in the titanium nitride layer;

[0009] The cover plate is cured;

[0010] The process parameters for spraying titanium nitride on the surface of the cover plate include: setting the powder feeding amount to 30-40 g / min, setting the electric power to 20-40 KW, setting the argon gas flow rate to 4-5 L / min, setting the hydrogen gas flow rate to 1-2 L / min, setting the spray gun voltage to 50-55 V, and setting the spray gun current to 200-300 A. By controlling the process parameters for spraying titanium nitride, the beneficial technical effect of improving the strength of the cover plate can be achieved, and the strength of the obtained cover plate is 2-5 hardness values ​​higher than that of the cover plate of the prior art.

[0011] As a preferred technical solution, the cover plate curing treatment includes heat curing treatment or ultraviolet curing treatment.

[0012] As a preferred technical solution, the spraying thickness of the titanium nitride layer is set to 5 to 13 um.

[0013] As a preferred technical solution, the spraying thickness of the titanium nitride layer is a film layer formed after a single or multiple sprayings.

[0014] As a preferred technical solution, a titanium nitride layer is sprayed on the surface of the cover plate using plasma spraying equipment or arc spraying equipment.

[0015] As a preferred technical solution, the surface of the cover plate is pretreated to remove surface oil and dust, including ultrasonic cleaning of the surface of the cover plate with an organic solvent or a cleaning agent to remove oil and dust.

[0016] As a preferred technical solution, it also includes using a flame plasma method to treat the surface of the cover plate to remove surface organic matter.

[0017] As a preferred technical solution, a flame plasma method is used to treat the cover plate surface, specifically including: setting the plasma power to 280-320W, setting the nozzle distance to 14-20mm from the cover plate surface, and setting the plasma cleaning speed to 50-80mm / s.

[0018] As a preferred technical solution, the hardness of the cover plate is 9 to 11 H / 1000 gf.

[0019] As a preferred technical solution, the thickness of the cover plate is 1.0 to 1.5 mm.

[0020] Compared with the prior art, the present invention has achieved the following technical effects: The present invention sprays on the surface of a plasma spraying device or an arc spraying device, and by controlling the spraying process, the hardness of the cover plate can be improved. After spraying, heating or UV curing is performed to ensure that the coating can be firmly attached to the surface of the cover plate. Spraying titanium nitride and other substances on the surface of the cover plate effectively enhances the hardness of the cover plate, which is 2 to 5 hardness values ​​higher than the standard of 6 to 7H / 1000gf of the traditional cover plate hardness, thereby improving the wear resistance and scratch resistance of the cover plate and extending the service life of the cover plate.

[0021] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent from the description, or may be understood by practicing the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of a method for improving the hardness of a cover plate proposed in Example 1 of the present invention Figure 1 ;

[0023] Figure 2 Schematic diagram of a method for improving the hardness of a cover plate proposed in Example 1 of the present invention Figure 2 . DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. In the description of the present invention, it should be noted that the term "or" is usually used in the sense of including "and / or", unless the content clearly indicates otherwise.

[0025] It should be understood that the various steps described in the method implementation of the present application can be performed in different orders and / or performed in parallel. In addition, the method implementation may include additional steps and / or omit the steps shown. The scope of the present application is not limited in this respect.

[0026] The term "including" and its variations used herein are open inclusions, i.e., "including but not limited to". The term "based on" means "based at least in part on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". The relevant definitions of other terms will be given in the following description.

[0027] It should be noted that the modifications of "one" and "plurality" mentioned in this application are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more". "Plurality" should be understood as two or more.

[0028] Example 1

[0029] like Figure 1-2 As shown, this embodiment proposes a method for improving the hardness of the cover plate, which specifically includes:

[0030] Step 1: Pre-treat the surface of the cover to remove surface oil and dust.

[0031] Step 2: Spray titanium nitride layer on the surface of the cover plate. Titanium nitride has high hardness, high wear resistance and good chemical stability, which can effectively enhance the hardness and scratch resistance of the cover plate. After spraying the titanium nitride layer, the annealing process is used to eliminate the residual stress in the titanium nitride layer, improve the toughness and bonding strength of the coating, and thus improve the hardness of the cover plate.

[0032] Among them, the process parameters for spraying titanium nitride on the cover plate surface include: setting the powder feeding amount to 30g / min, setting the electric power to 20KW, setting the argon gas flow rate to 4L / min, setting the hydrogen gas flow rate to 1L / min, setting the spray gun voltage to 50V, and setting the spray gun current to 200A.

[0033] Step 3: Curing the cover to form a solid coating on its surface. The cover curing process includes heating curing or UV curing. The curing temperature and time are adjusted according to the characteristics of the spraying material and the material of the cover to ensure that the coating can be firmly attached to the surface of the cover.

[0034] Preferably, the spraying thickness of the titanium nitride layer is set to 5 um.

[0035] Preferably, the spraying thickness of the titanium nitride layer is a film layer formed after single or multiple spraying.

[0036] Preferably, a titanium nitride layer is sprayed on the surface of the cover plate using plasma spraying equipment or arc spraying equipment.

[0037] Preferably, the surface of the cover plate is pretreated to remove surface oil and dust, including ultrasonic cleaning of the surface of the cover plate using an organic solvent or a cleaning agent to remove oil and dust, thereby further improving the surface cleanliness.

[0038] Preferably, the surface of the cover plate is treated by a flame plasma method to remove organic matter on the surface. Specifically, the surface of the cover plate is treated by a flame plasma method, which specifically includes: setting the plasma power to 300W, setting the nozzle distance to 20mm from the cover plate surface, and setting the plasma cleaning speed to 80mm / s.

[0039] Preferably, by applying the method for improving the hardness of a cover plate, the hardness of the obtained cover plate is 9H / 1000gf, which is 2 to 3 hardness values ​​higher than the hardness of a traditional cover plate of 6 to 7H / 1000gf, and the thickness of the cover plate is 1.0 to 1.5 mm.

[0040] Example 2

[0041] like Figure 1 As shown, this embodiment proposes a method for improving the hardness of the cover plate. Compared with Example 1, this embodiment adjusts the specific process parameters of spraying titanium nitride on the surface of the cover plate, specifically including:

[0042] Step 1: Pre-treat the surface of the cover to remove surface oil and dust.

[0043] Step 2: Spray a titanium nitride layer on the surface of the cover plate. After spraying the titanium nitride layer, an annealing process is performed to eliminate the residual stress in the titanium nitride layer.

[0044] Among them, the process parameters for spraying titanium nitride on the cover plate surface include: setting the powder feeding amount to 35g / min, setting the electric power to 30KW, setting the argon gas flow rate to 5L / min, setting the hydrogen gas flow rate to 2L / min, setting the spray gun voltage to 55V, and setting the spray gun current to 300A.

[0045] Step 3: Curing the cover plate. The cover plate curing process includes heating curing process or ultraviolet curing process.

[0046] Preferably, the spraying thickness of the titanium nitride layer is set to 13 um.

[0047] Preferably, the spraying thickness of the titanium nitride layer is a film layer formed after single or multiple spraying.

[0048] Preferably, a titanium nitride layer is sprayed on the surface of the cover plate using plasma spraying equipment or arc spraying equipment.

[0049] Preferably, the surface of the cover plate is pretreated to remove surface oil and dust, including ultrasonic cleaning of the surface of the cover plate using an organic solvent or a cleaning agent to remove oil and dust, thereby further improving the surface cleanliness.

[0050] Preferably, the surface of the cover plate is treated by a flame plasma method to remove organic matter on the surface. Specifically, the surface of the cover plate is treated by a flame plasma method, which specifically includes: setting the plasma power to 320W, setting the nozzle distance to 14mm from the cover plate surface, and setting the plasma cleaning speed to 50mm / s.

[0051] Preferably, by applying the method for improving the hardness of a cover plate, the hardness of the cover plate obtained is 11H / 1000gf, which is 4 to 5 hardness values ​​higher than the hardness of a traditional cover plate of 6 to 7H / 1000gf, and the thickness of the cover plate is 1.0 to 1.5 mm.

[0052] Example 3

[0053] like Figure 1 As shown, this embodiment proposes a method for improving the hardness of the cover plate. Compared with embodiments 1 and 2, this embodiment adjusts the specific process parameters of spraying titanium nitride on the surface of the cover plate, specifically including:

[0054] Step 1: Pre-treat the surface of the cover to remove surface oil and dust.

[0055] Step 2: Spray a titanium nitride layer on the surface of the cover plate. After spraying the titanium nitride layer, an annealing process is performed to eliminate the residual stress in the titanium nitride layer.

[0056] Among them, the process parameters for spraying titanium nitride on the cover plate surface include: setting the powder feeding amount to 40g / min, setting the electric power to 40KW, setting the argon gas flow rate to 4.5L / min, setting the hydrogen gas flow rate to 2L / min, setting the spray gun voltage to 53V, and setting the spray gun current to 260A.

[0057] Step 3: Curing the cover plate. The cover plate curing process includes heating curing process or ultraviolet curing process.

[0058] Preferably, the spraying thickness of the titanium nitride layer is set to 10 um.

[0059] Preferably, the spraying thickness of the titanium nitride layer is a film layer formed after single or multiple spraying.

[0060] Preferably, a titanium nitride layer is sprayed on the surface of the cover plate using plasma spraying equipment or arc spraying equipment.

[0061] Preferably, the surface of the cover plate is pretreated to remove surface oil and dust, including ultrasonic cleaning of the surface of the cover plate using an organic solvent or a cleaning agent to remove oil and dust, thereby further improving the surface cleanliness.

[0062] Preferably, the surface of the cover plate is treated by a flame plasma method to remove organic matter on the surface. Specifically, the surface of the cover plate is treated by a flame plasma method, which specifically includes: setting the plasma power to 280W, setting the nozzle distance to 17mm from the surface of the cover plate, and setting the plasma cleaning speed to 75mm / s.

[0063] Preferably, by applying the method for improving the hardness of a cover plate, the hardness of the cover plate obtained is 10H / 1000gf, which is 3 to 4 hardness values ​​higher than the hardness of a traditional cover plate of 6 to 7H / 1000gf, and the thickness of the cover plate is 1.0 to 1.5 mm.

[0064] The present invention effectively enhances the hardness of the cover plate, improves its wear resistance and scratch resistance, and prolongs the service life of the cover plate by spraying titanium nitride and other substances on the surface of the cover plate. The spraying thickness is controlled between 5 and 13 um, which can not only ensure the performance of the cover plate, but also reduce the production cost. The method of the present invention is simple to operate and easy to realize industrial production.

[0065] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Claims

1. A method for improving the hardness of a cover plate, characterized in that: include: Pre-treat the surface of the cover plate to remove surface oil and dust; A titanium nitride layer is sprayed on the surface of the cover plate, and after the titanium nitride layer is sprayed, an annealing process is performed to eliminate the residual stress in the titanium nitride layer; The cover plate is cured; Among them, the process parameters for spraying titanium nitride on the cover plate surface include: setting the powder feeding amount to 30-40g / min, setting the electric power to 20-40KW, setting the argon gas flow rate to 4-5L / min, setting the hydrogen gas flow rate to 1-2L / min, setting the spray gun voltage to 50-55V, and setting the spray gun current to 200-300A.

2. A method for improving the hardness of a cover plate according to claim 1, characterized in that: The curing treatment of the cover plate includes a heating curing treatment or an ultraviolet curing treatment.

3. A method for improving the hardness of a cover plate according to claim 2, characterized in that: The spraying thickness of the titanium nitride layer is set to 5-13 um.

4. A method for improving the hardness of a cover plate according to claim 3, characterized in that: The spraying thickness of the titanium nitride layer is a film layer formed after single or multiple spraying.

5. The method for improving the hardness of a cover plate according to claim 1, characterized in that: The titanium nitride layer is sprayed on the surface of the cover plate by using plasma spraying equipment or arc spraying equipment.

6. A method for improving the hardness of a cover plate according to claim 1, characterized in that: The surface of the cover plate is pretreated to remove oil stains and dust from the surface, including ultrasonic cleaning of the surface of the cover plate using an organic solvent or a cleaning agent to remove oil stains and dust.

7. A method for improving the hardness of a cover plate according to claim 6, characterized in that: The method also includes using a flame plasma method to treat the surface of the cover plate to remove organic matter on the surface.

8. A method for improving the hardness of a cover plate according to claim 7, characterized in that: The flame plasma method is used to treat the surface of the cover plate, specifically including: setting the plasma power to 280-320W, setting the nozzle distance to 14-20mm from the cover plate surface, and setting the plasma cleaning speed to 50-80mm / s.

9. A method for improving the hardness of a cover plate according to any one of claims 1 to 8, characterized in that: The hardness of the cover plate is 9-11H / 1000gf.

10. A method for improving the hardness of a cover plate according to claim 9, characterized in that: The thickness of the cover plate is 1.0-1.5 mm.

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