Zinc impregnation layer with high wear resistance as well as preparation method and application of zinc impregnation layer

Abstract

The invention provides a high-wear-resistance zinc impregnation layer as well as a preparation method and application thereof. The high-wear-resistance zinc impregnation layer is prepared from the following raw materials: a main impregnation agent, an auxiliary impregnation agent and an anti-binding agent, the preparation method of the high-wear-resistance zinc impregnation layer comprises the steps that the electric power fitting, a main impregnation agent, an auxiliary impregnation agent and an anti-binding agent are mixed and sealed, and zinc impregnation treatment is carried out after vacuumizing; after the zinc impregnation treatment is finished, the electric power fitting, the main impregnation agent, the auxiliary impregnation agent and the anti-binding agent are cooled together and then taken out; and after the taken-out electric power fitting is separated from the main permeating agent, the auxiliary permeating agent and the anti-binding agent, cleaning and drying are conducted, and a high-abrasion-resistance zinc permeating layer is formed on the surface of the electric power fitting. According to the Zn-B alloy infiltrated layer prepared through the mechanical rotation zinc impregnation technology, the abrasion resistance of the surface of the electric power fitting is effectively improved, and the service life of the electric power fitting part is obviously prolonged.

Description

Technical Field

[0001] The invention relates to a technology for preparing a surface coating of an electric power fitting, and in particular to a high wear-resistant zinc-diffusion layer and a preparation method and application thereof. Background Art

[0002] In recent years, the construction of electric power has developed rapidly, the scale of the power grid has continued to expand, and the laying of ultra-high voltage transmission lines has marked a significant improvement in power transmission capacity. In this process, power fittings, as key components for connecting and fixing transmission lines, are directly related to the safe operation of the entire power grid and the reliable transmission of electric energy. However, with the growing demand for electricity and the complex and changing use environment, the daily operation and maintenance of power fittings face severe challenges, especially the wear problem of power fittings, which has become an important factor affecting the stability of the power system and extending the life of transmission lines.

[0003] Power fittings are exposed to the outdoor environment for a long time and are subjected to physical wear caused by natural factors such as wind erosion, rain, and temperature changes, which accelerates the degradation of the fitting surface and reduces its effective service life. Once the fittings fail to function due to wear, it may cause the mechanical strength of the transmission line to decrease and the electrical connection to loosen. In severe cases, it may even cause major safety accidents such as line disconnection and short circuit, which will have a serious impact on social and economic activities and people's lives.

[0004] Chinese patent CN105463444A uses supersonic or cold spraying process to deposit nickel-based alloy powder on the surface of the substrate to form a NiCrBSi alloy bonding bottom layer, which has complete metallurgical bonding and can meet the high-load working conditions of sleeves and bearings that are resistant to corrosion and wear, but its process is complicated and difficult to be used in the field of power construction on a large scale. Chinese patent CN221031773U uses hot-dip galvanizing process to superimpose three layers of wear-resistant layer on the outer surface of the climbing pole of the angle steel tower of the long-distance transmission line to prevent wear caused by the climbing of operators and improve the strength of the climbing pole, but its disadvantage is that the process involves the use of chemical substances, which will pollute the environment.

[0005] As an effective protective measure, the zinc-diffusion layer can form a dense zinc alloy layer on the surface of the hardware. This layer can not only provide good electrochemical protection and slow down the corrosion rate of the substrate, but also significantly enhance the hardness and wear resistance of the hardware surface, effectively resisting the physical wear of the external environment. Compared with traditional hot-dip galvanizing and electrogalvanizing, powder zinc-diffusion technology can more evenly penetrate the metal interior and form a more solid bonding layer. Even under heavy industrial pollution and extreme climatic conditions, it can maintain good wear resistance and extend the service life of the hardware. Chinese patent CN106676466A introduces a zinc-diffusion process and equipment in a non-vacuum environment. This zinc-diffusion process is not limited to zinc-diffusion treatment in a closed environment, but can also be carried out in a non-sealed environment, reducing the process time. However, its static zinc-diffusion method may have problems such as incomplete penetration for workpieces with complex shapes, deep holes or narrow gaps.

[0006] In view of this, improving the performance of the surface protective layer of power fittings, especially developing more advanced zinc-diffusion layer preparation technology, has become one of the key ways to solve the problem of fitting wear. Summary of the invention

[0007] The purpose of the present invention is to provide a highly wear-resistant zinc-plated layer and a preparation method and application thereof, so as to overcome the problems existing in the prior art. The present invention adopts a Zn-B alloy zinc-plated layer prepared by mechanical rotary zinc-plating technology, which effectively improves the wear resistance of the surface of electric hardware and significantly prolongs the service life of electric hardware components.

[0008] The present invention is achieved through the following technical solutions: A highly wear-resistant zinc-plated layer, wherein the raw materials for preparing the highly wear-resistant zinc-plated layer include a main infiltration agent, an auxiliary infiltration agent and an anti-adhesion agent; The main penetration agent is a mixture of Zn and B, the penetration aid is Al2O3, and the anti-adhesion agent is NH4Cl; in terms of mass fraction, the components are as follows: 72%~74% Zn, 1%~3% B, 20%~22% Al2O3, and 3%~5% NH4Cl.

[0009] A method for preparing a highly wear-resistant zinc-plated layer comprises the following steps: The electrical fittings are mixed with the main penetration agent, the penetration aid and the anti-adhesion agent to seal, and then the zincizing treatment is carried out after vacuuming; After the zinc treatment is completed, the electrical fittings, main infiltration agent, infiltration aid and anti-adhesion agent are cooled and taken out; The removed electric power fittings are separated from the main penetrant, the penetrant aid and the anti-adhesive, and then cleaned and dried to form a highly wear-resistant zinc-diffused layer on the surface of the electric power fittings.

[0010] Furthermore, the electrical fittings are pre-treated before being mixed and sealed with the main penetration agent, the penetration aid and the anti-adhesion agent, and the pre-treatment includes degreasing, rust removal, water washing and drying.

[0011] Furthermore, the degreasing is specifically: immersing the electrical fittings in a degreasing agent at a temperature of 300-350° C. for 20-30 minutes.

[0012] Furthermore, the rust removal is specifically as follows: laser rust removal is performed on the electrical fittings after oil removal, and the parameters of the laser rust removal are: laser power of 150~350W, spot diameter of 3~5mm, scanning speed of 150~250mm / s, and overlap rate of 55~75%.

[0013] Furthermore, the vacuuming is specifically: vacuuming to 0.1 MPa.

[0014] Furthermore, the temperature of the sherardizing treatment is 440-480° C., and the time is 210-240 min.

[0015] Furthermore, during the sherardizing treatment process, a mechanical rotary sherardizing technology is adopted with a rotation speed of 20-24 r / min.

[0016] Furthermore, the cooling is specifically: cooling to below 70°C.

[0017] The invention discloses an application of a highly wear-resistant zinc-plated layer on electric power fittings.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention can enhance the bonding force between the coating and the substrate, reduce the risk of coating peeling, and increase the toughness of the coating by controlling the B content, which is particularly important for components subjected to mechanical stress. At the same time, it can ensure that the composition of the diffusion layer is controllable, laying a foundation for the flexible design of the composition of the diffusion layer; the Zn-B alloy diffusion layer prepared by the present invention effectively improves the wear resistance of the surface of the electric hardware and significantly prolongs the service life of the electric hardware components.

[0019] In addition, the present invention adopts a mechanical rotary sherardizing technology with a relatively high rotation speed, which can make the sherardizing agent keep in contact with the surface of the workpiece, and help Zn-B atoms diffuse more evenly to the entire workpiece surface, including the corners and grooves on the surface of the electric hardware, so as to obtain a Zn-B alloy sherardizing layer with uniform thickness; it can also promote the diffusion rate of Zn-B atoms, shorten the time required for the sherardizing treatment, and improve production efficiency. Compared with the traditional static sherardizing method, the mechanical rotary sherardizing technology forms mechanical friction between the electric hardware and the sherardizing powder, promotes the diffusion of B in the sherardizing layer, significantly improves the bonding strength, thickness and density of the sherardizing layer, and achieves the effect of mechanically assisted sherardizing. The synergistic effect of the two promotes the application of B in the field of sherardizing layer preparation, and provides a guarantee for obtaining a highly wear-resistant sherardizing layer with a long service life. DETAILED DESCRIPTION

[0020] The present invention is described in detail below: The present invention provides a high wear-resistant sherardizing layer. The main sherardizing agent used for preparing the sherardizing layer is a mixture of Zn and B, the penetrating agent component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 72%-74% of Zn, 1%-3% of B, 20%-22% of Al2O3, and 3%-5% of NH4Cl.

[0021] The present invention also provides a method for preparing a high wear-resistant sherardizing layer, comprising the following steps: (1) Mix the electrical fittings with the main penetration agent, the penetration aid and the anti-adhesion agent, seal them, and then perform zinc infiltration after vacuuming; (2) After the zinc treatment is completed, the electrical fittings, main infiltration agent, infiltration aid and anti-adhesion agent are cooled and taken out; (3) After the removed electrical fittings are separated from the main impregnation agent, impregnation aid and anti-adhesion agent, they are cleaned and dried to form a highly wear-resistant zinc-plated layer on the surface of the electrical fittings.

[0022] (4) Cooling: Cool the electrical fittings, main zincizing agent, zinc-enhancing agent and anti-adhesive agent in the vacuum zincizing tank to below 70°C and take them out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying treatment: Use a drying oven to dry the cleaned electrical fittings to form a highly wear-resistant zinc-plated layer on the surface of the electrical fittings.

[0023] In step (1), before the electric power fittings are mixed and sealed with the main penetrant, the penetrant aid and the anti-adhesive, the electric power fittings are pre-treated: the surface of the electric power fittings to be processed is degreased, derusted, washed and dried; wherein the degreasing and derusting are specifically as follows: a. The temperature of the degreasing agent is 300~350℃. Soak the electrical fittings in the degreasing agent for 20~30 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings are subjected to laser rust removal treatment, and the parameters are: laser power 150~350W, spot diameter 3~5mm, scanning speed 150~250mm / s, and overlap rate 55~75%.

[0024] In step (1), the vacuuming is specifically: vacuuming to 0.1 MPa.

[0025] In step (1), the sherardizing treatment is specifically as follows: the pre-treated electrical fittings are placed together with the main sherardizing agent, the auxiliary sherardizing agent and the anti-adhesive agent in a vacuum sherardizing tank, and the sealed vacuum sherardizing tank is evacuated to 0.1 MPa; then the sherardizing treatment is carried out at a temperature of 440-480°C, the sherardizing treatment time is 210-240 minutes, and during the sherardizing treatment process, a mechanical rotary sherardizing technology is used, and the rotation speed is 20-24 r / min.

[0026] Mechanical rotary sherardizing technology allows the sherardizing agent to be in continuous contact with the workpiece surface, which helps the Zn-B atoms to diffuse more evenly over the entire workpiece surface, including the corners and grooves on the surface of the electrical fittings, so as to obtain a Zn-B alloy layer with uniform thickness; it can also promote the diffusion rate of Zn-B atoms, shorten the time required for the sherardizing treatment, and improve production efficiency.

[0027] In step (2), the electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to below 70° C. and taken out of the furnace.

[0028] In step (3), cleaning specifically includes: separating the main impregnation agent, impregnation aid and anti-adhesion agent from the electric fittings after being taken out of the furnace, and then putting them into a water pool for cleaning; drying specifically includes: using a drying box to dry the cleaned electric fittings to form a highly wear-resistant zinc-plated layer on the surface of the electric fittings.

[0029] The invention improves the wear resistance of the zinc-plated layer on the surface of the electric power hardware by adding the B element. The added B element can promote the grain refinement of the Zn-Fe alloy zinc-plated layer. The fine grain structure can enhance the hardness and wear resistance of the alloy zinc-plated layer, and at the same time improve the corrosion resistance of the zinc-plated layer, thereby significantly extending the service life of the electric power hardware components.

[0030] The invention also provides an application of a high wear-resistant zinc-plated layer on electric power fittings.

[0031] The invention uses the Zn-B alloy infiltration layer prepared by mechanical rotary zinc infiltration technology on the electric power fittings, effectively improves the wear resistance of the surface of the electric power fittings, and significantly prolongs the service life of the electric power fitting parts.

[0032] The embodiments of the present invention will be described in detail below in conjunction with the examples. The implementation cases are preferred embodiments of the present invention and should not be used to limit the scope of the present invention. In the following examples, the methods and experimental equipment used are all conventional methods and instruments unless otherwise specified.

[0033] Example 1 A high wear-resistant sherardizing layer, wherein the main sherardizing agent used to prepare the sherardizing layer is a mixture of Zn and B, the penetrating agent component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 74% Zn, 1% B, 20% Al2O3, and 5% NH4Cl.

[0034] The present invention is a method for improving the wear resistance of a zinc-plated layer on the surface of an electric power fitting by adding a B element, comprising the following steps: (1) Pretreatment of electrical fittings: degreasing, rust removal, water washing and drying of the surface of the electrical fittings to be processed; (2) Pretreatment of zinc plating: put the pretreated electrical fittings together with the main zinc plating agent, the auxiliary zinc plating agent and the anti-adhesive agent into a vacuum zinc plating tank, and evacuate the sealed vacuum zinc plating tank to 0.1MPa; (3) Sherardizing treatment: heating to 440°C and keeping warm for 210 minutes; (4) Cooling: The electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to 60°C and taken out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying: Use a drying oven to dry the cleaned electrical fittings.

[0035] The degreasing and rust removal in the pretreatment in step (1) are specifically as follows: a. The temperature of the degreasing agent is 300℃. Soak the electrical fittings in the degreasing agent for 20 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings are subjected to laser rust removal treatment, and the parameters are: laser power 150W, spot diameter 3mm, scanning speed 150mm / s, and overlap rate 75%.

[0036] In the step (3), a mechanical rotary zincizing technology is adopted, and the rotation speed is 20r / min.

[0037] Example 2 A high wear-resistant sherardizing layer, wherein the main sherardizing agent used to prepare the sherardizing layer is a mixture of Zn and B, the penetrating agent component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 73% Zn, 2% B, 21% Al2O3, and 4% NH4Cl.

[0038] The present invention is a method for improving the wear resistance of a zinc-plated layer on the surface of an electric power fitting by adding a B element, comprising the following steps: (1) Pretreatment of electrical fittings: degreasing, rust removal, water washing and drying of the surface of the electrical fittings to be processed; (2) Pretreatment of zinc plating: put the pretreated electrical fittings together with the main zinc plating agent, the auxiliary zinc plating agent and the anti-adhesive agent into a vacuum zinc plating tank, and evacuate the sealed vacuum zinc plating tank to 0.1MPa; (3) Sherardizing treatment: heat to 465℃ and keep warm for 225min; (4) Cooling: The electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to 65°C and taken out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying: Use a drying oven to dry the cleaned electrical fittings.

[0039] The degreasing and rust removal in the pretreatment in step (1) are specifically as follows: a. The temperature of the degreasing agent is 325℃. Soak the electrical fittings in the degreasing agent for 25 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings were subjected to laser rust removal treatment, and the parameters were: laser power 250W, spot diameter 4mm, scanning speed 200mm / s, and overlap rate 65%.

[0040] In the step (3), a mechanical rotary sherardizing technology is adopted, and the rotation speed is 22 r / min.

[0041] Example 3 A high wear-resistant sherardizing layer, wherein the main sherardizing agent used to prepare the sherardizing layer is a mixture of Zn and B, the penetrating agent component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 72% Zn, 3% B, 22% Al2O3, and 3% NH4Cl.

[0042] The present invention is a method for improving the wear resistance of a zinc-plated layer on the surface of an electric power fitting by adding a B element, comprising the following steps: (1) Pretreatment of electrical fittings: degreasing, rust removal, water washing and drying of the surface of the electrical fittings to be processed; (2) Pretreatment of zinc plating: put the pretreated electrical fittings together with the main zinc plating agent, the auxiliary zinc plating agent and the anti-adhesive agent into a vacuum zinc plating tank, and evacuate the sealed vacuum zinc plating tank to 0.1MPa; (3) Sherardizing treatment: heating to 480°C and keeping warm for 240 minutes; (4) Cooling: The electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to 68°C and taken out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying: Use a drying oven to dry the cleaned electrical fittings.

[0043] The degreasing and rust removal in the pretreatment in step (1) are specifically as follows: a. The temperature of the degreasing agent is 350℃. Soak the electrical fittings in the degreasing agent for 30 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings were subjected to laser rust removal treatment, and the parameters were: laser power 350W, spot diameter 5mm, scanning speed 250mm / s, and overlap rate 55%.

[0044] In the step (3), a mechanical rotary zincizing technology is adopted, and the rotation speed is 24r / min.

[0045] Comparative Example 1 A zinc-diffusion layer is provided, wherein the main diffusing agent used in preparing the zinc-diffusion layer is Zn, the diffusing aid component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 74% of Zn, 21% of Al2O3, and 5% of NH4Cl. The preparation process of the above-mentioned zinc-plating layer comprises the following steps: (1) Pretreatment of electrical fittings: degreasing, rust removal, water washing and drying of the surface of the electrical fittings to be processed; (2) Pretreatment of zinc plating: put the pretreated electrical fittings together with the main zinc plating agent, the auxiliary zinc plating agent and the anti-adhesive agent into a vacuum zinc plating tank, and evacuate the sealed vacuum zinc plating tank to 0.1MPa; (3) Sherardizing treatment: heating to 440°C and keeping warm for 210 minutes; (4) Cooling: The electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to 60°C and taken out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying: Use a drying oven to dry the cleaned electrical fittings.

[0046] The degreasing and rust removal in the pretreatment in step (1) are specifically as follows: a. The temperature of the degreasing agent is 300℃. Soak the electrical fittings in the degreasing agent for 20 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings are subjected to laser rust removal treatment, and the parameters are: laser power 150W, spot diameter 3mm, scanning speed 150mm / s, and overlap rate 75%.

[0047] Comparative Example 2 A zinc-diffusion layer is provided, wherein the main diffusing agent used in preparing the zinc-diffusion layer is Zn, the diffusing aid component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 74% of Zn, 21% of Al2O3, and 5% of NH4Cl.

[0048] The preparation process of the above-mentioned zinc-plating layer comprises the following steps: (1) Pretreatment of electrical fittings: degreasing, rust removal, water washing and drying of the surface of the electrical fittings to be processed; (2) Pretreatment of zinc plating: put the pretreated electrical fittings together with the main zinc plating agent, the auxiliary zinc plating agent and the anti-adhesive agent into a vacuum zinc plating tank, and evacuate the sealed vacuum zinc plating tank to 0.1MPa; (3) Sherardizing treatment: heating to 440°C and keeping warm for 210 minutes; (4) Cooling: The electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to 60°C and taken out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying: Use a drying oven to dry the cleaned electrical fittings.

[0049] The degreasing and rust removal in the pretreatment in step (1) are specifically as follows: a. The temperature of the degreasing agent is 300℃. Soak the electrical fittings in the degreasing agent for 20 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings are subjected to laser rust removal treatment, and the parameters are: laser power 150W, spot diameter 3mm, scanning speed 150mm / s, and overlap rate 75%.

[0050] In the step (3), a mechanical rotary zincizing technology is adopted, and the rotation speed is 20r / min.

[0051] Comparative Example 3 A zinc-diffusion layer is provided, wherein the main diffusing agent used in preparing the zinc-diffusion layer is Zn, the diffusing aid component is Al2O3, and the anti-adhesive component is NH4Cl, wherein the mass fraction of each component is as follows: 74% Zn, 1% B, 20% Al2O3, and 5% NH4Cl.

[0052] The preparation process of the above-mentioned zinc-plating layer comprises the following steps: (1) Pretreatment of electrical fittings: degreasing, rust removal, water washing and drying of the surface of the electrical fittings to be processed; (2) Pretreatment of zinc plating: put the pretreated electrical fittings together with the main zinc plating agent, the auxiliary zinc plating agent and the anti-adhesive agent into a vacuum zinc plating tank, and evacuate the sealed vacuum zinc plating tank to 0.1MPa; (3) Sherardizing treatment: heating to 440°C and keeping warm for 210 minutes; (4) Cooling: The electrical fittings, main zincizing agent, auxiliary zincizing agent and anti-adhesive agent in the vacuum zincizing tank are cooled to 60°C and taken out of the furnace; (5) Flushing of electrical fittings: After the electrical fittings are taken out of the furnace, they are separated from the main penetrant, penetration enhancer and anti-adhesive agent, and then placed in a water pool for cleaning; (6) Drying: Use a drying oven to dry the cleaned electrical fittings.

[0053] The degreasing and rust removal in the pretreatment in step (1) are specifically as follows: a. The temperature of the degreasing agent is 300℃. Soak the electrical fittings in the degreasing agent for 20 minutes. During this period, turn the electrical fittings over several times to ensure that the two are in full contact. Pick them up when there is no oil on the surface. Drain the degreasing agent after picking them up. b. The degreasing electrical fittings are subjected to laser rust removal treatment, and the parameters are: laser power 150W, spot diameter 3mm, scanning speed 150mm / s, and overlap rate 75%.

[0054] The electrical fittings prepared in the above-mentioned embodiments and comparative examples were subjected to wear tests under the same conditions, and the results are shown in Table 1: Table 1 Application of mechanical rotary sherardizing technology and the effect of B addition on the wear loss of the sherardizing layer (15N, 30min)

[0055] It can be seen from Table 1 that in the process of sherardizing, the application of mechanical rotary sherardizing technology and the addition of B can reduce the wear of the sherardizing layer, and the more B content, the less wear of the sherardizing layer. This shows that the synergistic effect of mechanical rotary sherardizing technology and B can improve the wear resistance of the sherardizing layer.

[0056] Although the present invention has been disclosed as above in the form of a preferred embodiment, it is not intended to limit the present invention. Anyone familiar with this technology can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A highly wear-resistant sherardizing layer, characterized in that: The raw materials for preparing the high wear-resistant zinc-plating layer include a main infiltration agent, an infiltration aid and an anti-adhesion agent; The main penetration agent is a mixture of Zn and B, the penetration aid is Al2O3, and the anti-adhesion agent is NH4Cl; in terms of mass fraction, the components are as follows: 72%~74% Zn, 1%~3% B, 20%~22% Al2O3, and 3%~5% NH4Cl.

2. The method for preparing the high wear-resistant zinc-plated layer according to claim 1, characterized in that: The following steps are involved: The electrical fittings are mixed with the main penetration agent, the penetration aid and the anti-adhesion agent to seal, and then the zincizing treatment is carried out after vacuuming; After the zinc treatment is completed, the electrical fittings, main infiltration agent, infiltration aid and anti-adhesion agent are cooled and taken out; The removed electric power fittings are separated from the main penetrant, the penetrant aid and the anti-adhesive, and then cleaned and dried to form a highly wear-resistant zinc-diffused layer on the surface of the electric power fittings.

3. The method for preparing a highly wear-resistant zinc-plated layer according to claim 2, characterized in that: The electric power fittings are pre-treated before being mixed and sealed with the main penetration agent, the penetration aid and the anti-adhesion agent, and the pre-treatment includes degreasing, rust removal, water washing and drying.

4. The method for preparing a highly wear-resistant sherardizing layer according to claim 3, characterized in that: The degreasing is specifically as follows: immersing the electrical fittings in a degreasing agent at a temperature of 300-350° C. for 20-30 minutes.

5. The method for preparing a highly wear-resistant sherardizing layer according to claim 3, characterized in that: The rust removal specifically includes: performing laser rust removal on the degreasing electrical fittings, and the parameters of the laser rust removal are: laser power of 150-350W, spot diameter of 3-5mm, scanning speed of 150-250mm / s, and overlap rate of 55-75%.

6. The method for preparing a high wear-resistant sherardizing layer according to claim 2, characterized in that: The vacuuming specifically includes: vacuuming to 0.1 MPa.

7. The method for preparing a highly wear-resistant sherardizing layer according to claim 2, characterized in that: The temperature of the sherardizing treatment is 440-480° C., and the time is 210-240 min.

8. The method for preparing a high wear-resistant sherardizing layer according to claim 2, characterized in that: During the sherardizing treatment process, a mechanical rotary sherardizing technology is adopted with a rotation speed of 20-24 r / min.

9. The method for preparing a highly wear-resistant sherardizing layer according to claim 2, characterized in that: The cooling specifically includes cooling to below 70°C.

10. Use of the high wear-resistant sherardizing layer according to claim 1 in electric power fittings.

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