Method for protecting non-nitrogen surface of nitrided part

Abstract

The invention provides a protection method for a non-nitrogen surface of a nitriding part, and belongs to the technical field of nitriding protection. Covering the nitriding surface of the cleaned part with an insulating material; carrying out sand blasting treatment on the non-nitriding surface of the part; a metal wire is used for vertically hanging the part; preparing an anti-nitriding coating; spraying anti-nitriding paint on the non-nitriding surface of the surface of the part to form a coating; and drying the coating on the part. According to the treatment scheme, a spraying mode is adopted, so that the production efficiency is effectively improved, the labor cost is reduced, and a coating is more uniform and is not prone to falling off.

Description

Technical Field

[0001] The present application relates to the field of nitriding protection, and in particular to a method for protecting a non-nitrided surface of a nitrided part. Background Art

[0002] Nowadays, copper plating, coatings, and tooling methods are mostly used to protect parts from nitriding. Among the coating protection methods, most of the coatings are applied manually, resulting in low production efficiency and poor anti-nitriding protection effect. Summary of the invention

[0003] In view of this, the present application provides a method for protecting the non-nitrided surface of a nitrided part, which solves the problems in the prior art, effectively improves production efficiency, and plays a good protective role on the non-nitrided surface.

[0004] The present application provides a method for protecting the non-nitrided surface of a nitrided part using the following technical solution:

[0005] A method for protecting a non-nitrided surface of a nitrided part, comprising:

[0006] Cleaning parts;

[0007] Cover the nitrided surface of the cleaned parts with insulating materials;

[0008] Sandblasting treatment is performed on the non-nitrided surface of the parts;

[0009] Use wire to hang parts vertically;

[0010] Preparation of anti-nitriding coating;

[0011] Spray anti-nitriding paint on the non-nitriding surface of the part surface to form a coating;

[0012] Dry the coating on the parts.

[0013] Optionally, the steps of cleaning the parts include:

[0014] The parts were cleaned with anhydrous ethanol, then put into ultrasonic cleaning for 15min-30min, washed with clean water, and then put into a 50℃ dryer for drying.

[0015] Optionally, the step of covering the nitrided surface of the part with an insulating material specifically includes: wrapping an insulating tape around the nitrided surface of the part.

[0016] Optionally, the method for preparing anti-nitriding includes:

[0017] Add ANO-2 type coating to the container;

[0018] Use a glass rod to continuously stir the ANO-2 coating and add water glass to the ANO-2 coating at intervals;

[0019] Stop adding water glass until the mixture can form a 10S uninterrupted liquid column when the glass rod is lifted to obtain the anti-nitriding coating.

[0020] Optionally, in the process of preparing anti-nitriding: after adding water glass to the ANO-2 type coating, if the mixed solution is too thick, add distilled water to the mixed solution, and put the container with the mixture into hot water at 45-55°C, use a glass rod to stir and add distilled water at intervals until the glass rod lifts the mixture to form a 10S uninterrupted liquid column, then stop adding distilled water to obtain the anti-nitriding coating.

[0021] Optionally, the step of spraying an anti-nitriding coating on the non-nitriding surface of the part surface to form a coating includes:

[0022] Spray the anti-nitriding coating on the non-nitriding surface of the parts three to four times, and spray the second time after the surface of the film sprayed last time is dry. The total thickness of the coating is 0.5-1mm;

[0023] During the spraying process, the distance between the nozzle of the spray gun and the part is 150-250mm, and the angle between the nozzle of the spray gun and the part is 70 to 90°.

[0024] Optionally, the step of drying the coating on the part includes:

[0025] After the sprayed parts have been left to stand for 1 hour at room temperature, they are placed in an oven;

[0026] The parts are heated up in the oven along with the furnace. First, the parts are heated to 100±10℃ and kept warm for 2 hours. Then, the parts are heated to 150±10℃ and kept warm for 2 hours before being taken out to complete the coating drying.

[0027] In summary, this application includes the following beneficial technical effects:

[0028] The present application provides a method for local nitriding protection of shaft parts. The method first modifies the traditional manual coating method and adopts a spray coating method, which effectively improves production efficiency, reduces labor costs, and makes the coating more uniform and less likely to fall off. It effectively improves the anti-nitriding surface protection effect and has promotion and application value in the field of nitriding protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 This is a schematic flow chart of the method for protecting the non-nitrided surface of a nitrided part in the present application. DETAILED DESCRIPTION

[0031] The embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0032] The following describes the implementation methods of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present application.

[0033] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present application, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0034] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. The illustrations only show the components related to the present application rather than being drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0035] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0036] An embodiment of the present application provides a method for protecting a non-nitrided surface of a nitrided part.

[0037] A method for protecting a non-nitrided surface of a nitrided part comprises the following steps:

[0038] Step 1, cleaning parts: Use anhydrous ethanol to clean the parts, then put them in ultrasonic cleaning for 15min-30min, rinse with clean water, and then put them in a 50℃ dryer for drying.

[0039] Step 2: Cover the nitrided surface of the cleaned part with insulating material. Specifically, wrap a non-glue insulating tape around the nitrided surface of the part.

[0040] Step 3, perform sandblasting treatment on the non-nitriding surface of the part.

[0041] Step 4: Use metal wire to hang the parts vertically;

[0042] Step 5, preparing anti-nitriding coating:

[0043] Add ANO-2 type coating to the container;

[0044] Continue stirring the ANO-2 coating and add water glass to the ANO-2 coating at intervals;

[0045] Stop adding water glass until the mixture can form a continuous liquid column for 10 seconds when the glass rod is lifted to obtain the anti-nitriding coating.

[0046] In one embodiment, 500 ml of ANO-2 coating is added to a container; the ANO-2 coating is continuously stirred with a glass rod and water glass is added to the ANO-2 coating at intervals, 10 grams of water glass is added each time, and after each addition of water glass, the glass rod is lifted up to observe the state of the mixture dripping from the glass rod after stirring evenly; the water glass is stopped after the mixture can form an uninterrupted liquid column for 10 seconds when the glass rod is lifted up, and the anti-nitriding coating is obtained. If the water glass added at a certain time is excessive, an appropriate amount of distilled water can be added to the mixture and then continued to stir, and the dripping state of the mixture can be observed when the glass rod is lifted up.

[0047] During the preparation of anti-nitriding coating: after adding water glass to the ANO-2 type coating, if the mixed solution is too thick, add distilled water to the mixed solution, and put the container with the mixture into hot water at 45-55°C, stir with a glass rod and add distilled water at intervals until the glass rod lifts the mixture to form a 10S uninterrupted liquid column, then stop adding distilled water to obtain the anti-nitriding coating.

[0048] Step 6, spray anti-nitriding paint on the non-nitriding surface of the part to form a coating: spray the anti-nitriding paint on the non-nitriding surface of the part three to four times, and spray the second time after the surface of the film sprayed for the previous time is dry. The total thickness of the coating is 0.5-1mm; during the spraying process, the distance between the nozzle of the spray gun and the part is 150-250mm, and the angle between the nozzle of the spray gun and the part is 70 to 90°.

[0049] Step 7, drying the coating on the parts: leaving the sprayed parts at room temperature for 1 hour and then putting them into an oven;

[0050] The parts are heated up in the oven along with the furnace. First, the parts are heated to 100±10℃ and kept warm for 2 hours. Then, the parts are heated to 150±10℃ and kept warm for 2 hours before being taken out to complete the coating drying.

[0051] In the embodiment of the present application, the interval between the sand blasting and coating processes shall not exceed 6 hours.

[0052] The present application provides a method for local nitriding protection of shaft parts. The method first modifies the traditional manual coating method and adopts a spraying method to effectively improve production efficiency, reduce labor costs, make the coating more uniform, and not easy to fall off. The coating is sprayed, and after multiple adjustments of the consistency, spray gun pressure and part surface state, the spraying of the non-nitriding surface can protect nitrogen atoms from penetrating into the matrix, with good protection effect, improved production efficiency, qualified products, and meeting the use and nitriding process requirements of the parts. It effectively improves the protection effect of the anti-nitriding surface and has promotion and application value in the field of nitriding protection.

[0053] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A method for protecting the non-nitrided surface of a nitrided part, characterized in that: include: Cleaning parts; Cover the nitrided surface of the cleaned parts with insulating materials; Sandblasting treatment is performed on the non-nitrided surface of the parts; Use wire to hang parts vertically; Preparation of anti-nitriding coating; Spray anti-nitriding paint on the non-nitriding surface of the part surface to form a coating; Dry the coating on the parts.

2. The method for protecting the non-nitrided surface of a nitrided part according to claim 1, characterized in that: The steps for cleaning parts include: The parts were cleaned with anhydrous ethanol, then put into ultrasonic cleaning for 15min-30min, washed with clean water, and then put into a 50℃ dryer for drying.

3. The method for protecting the non-nitrided surface of a nitrided part according to claim 1, characterized in that: The step of covering the nitrided surface of the part with an insulating material specifically includes: wrapping an insulating tape around the nitrided surface of the part.

4. The method for protecting the non-nitrided surface of a nitrided part according to claim 1, characterized in that: The method for preparing anti-nitriding comprises: Add ANO-2 type coating to the container; Use a glass rod to continuously stir the ANO-2 coating and add water glass to the ANO-2 coating at intervals; Stop adding water glass until the mixture can form a continuous liquid column for 10 seconds when the glass rod is lifted to obtain the anti-nitriding coating.

5. The method for protecting the non-nitrided surface of a nitrided part according to claim 4, characterized in that: During the preparation of anti-nitriding coating: after adding water glass to the ANO-2 type coating, if the mixed solution is too thick, add distilled water to the mixed solution, and put the container with the mixture into hot water at 45-55°C, stir with a glass rod and add distilled water at intervals until the glass rod lifts the mixture to form a 10S uninterrupted liquid column, then stop adding distilled water to obtain the anti-nitriding coating.

6. The method for protecting the non-nitrided surface of a nitrided part according to claim 1, characterized in that: The steps of spraying anti-nitriding coating on the non-nitriding surface of the part surface to form a coating include: Spray the anti-nitriding coating on the non-nitriding surface of the parts three to four times, and spray the second time after the surface of the film sprayed last time is dry. The total thickness of the coating is 0.5-1mm; During the spraying process, the distance between the nozzle of the spray gun and the part is 150-250mm, and the angle between the nozzle of the spray gun and the part is 70 to 90°.

7. The method for protecting the non-nitrided surface of a nitrided part according to claim 1, characterized in that: The steps for drying the coating on the part include: After the sprayed parts have been left to stand for 1 hour at room temperature, they are placed in an oven; The parts are heated up in the oven along with the furnace. First, the parts are heated to 100±10℃ and kept warm for 2 hours. Then, the parts are heated to 150±10℃ and kept warm for 2 hours before being taken out to complete the coating drying.

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