Preparation of wear-resistant chemical nickel-boron plating alloy of neodymium iron boron rare earth permanent magnet material

Abstract

The invention provides a preparation method of a wear-resistant chemical nickel-plated boron alloy of a neodymium iron boron rare earth permanent magnet material, which comprises the following steps: S1, ultrasonic cleaning: in order to remove tiny metal powder and impurities on the surface and in pores of a part, putting the part into an ultrasonic cleaning machine, and carrying out ultrasonic cleaning with B-type pure water for 15-20 minutes at the ultrasonic cleaning temperature of 10-40 DEG C; s2, magnesium oxide oil removal: dipping a clean banister brush into magnesium oxide powder to carefully wipe the to-be-plated surface for 2-3 times in order to thoroughly remove oil stains of the part; according to the preparation method of the wear-resistant chemical nickel-boron plating alloy of the neodymium-iron-boron rare earth permanent magnet material provided by the invention, the problems that the neodymium-iron-boron permanent magnet material is low in corrosion resistance and the material is easy to fall off are solved by carrying out acid corrosion, activation, nickel immersion and chemical nickel-boron plating processes on the material and then carrying out vacuum heat treatment, the surface hardness of a part is improved, and the wear-resistant chemical nickel-boron plating alloy of the neodymium-iron-boron rare earth permanent magnet material is obtained. Therefore, the function and the service life of the product are increased.

Description

Technical Field

[0001] The invention relates to the technical field of NdFeB rare earth permanent magnet materials, in particular to the preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet materials. Background Art

[0002] Sintered NdFeB permanent magnet materials are widely used in many fields such as electronics, electricity, machinery, and medical treatment due to their excellent magnetic properties. They are indispensable in permanent magnet motors, magnetic separators, disk drives, and magnetic resonance imaging equipment.

[0003] However, NdFeB material contains a high proportion of the rare earth element neodymium (Nd). Neodymium metal has extremely active chemical properties. Once exposed to air, it will quickly oxidize and the surface will darken. Although the reaction is relatively slow when placed in cold water, the reaction rate will be greatly accelerated if it is in a hot water environment. Such active chemical properties make the material extremely susceptible to chemical corrosion, resulting in powdering and poor wear resistance, which directly affects the function and service life of the product.

[0004] Therefore, it is necessary to provide a method for preparing a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material to solve the above technical problems. Summary of the invention

[0005] The invention provides a preparation method for wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material, which solves the problems of easy pulverization corrosion and poor wear resistance, which directly affect the function and service life of the product.

[0006] In order to solve the above technical problems, the present invention provides a method for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material, comprising the following steps:

[0007] S1. Ultrasonic cleaning: To remove tiny metal powders and impurities on the surface and pores of parts, put the parts into an ultrasonic cleaning machine and use Class B pure water for ultrasonic cleaning for 15min to 20min. The ultrasonic cleaning temperature is 10℃ to 40℃.

[0008] S2. Magnesium oxide degreasing: To completely remove the oil stains on the parts, use a clean soft brush dipped in magnesium oxide powder to carefully wipe the surface to be plated 2 to 3 times until the water film on the surface of the parts is uniform, and then wash with running water;

[0009] S3, acid etching: acid etching the parts after the processing in step S2, and then washing them with running water;

[0010] S4, weak acid activation: weak acid activation of the parts after processing in step S3, and then washing with running water;

[0011] S5, nickel immersion treatment: nickel immersion treatment is performed on the parts after the processing in step S4, and then washed with running water;

[0012] S6, nickel electroplating: electroplating nickel on the parts after the processing in step S5, and then washing with running water;

[0013] S7, chemical nickel-boron alloy plating: chemically plating the parts after the processing in step S6 with nickel-boron alloy, and then washing with running water;

[0014] S8, hot pure water boiling and washing: the parts after the processing in step S7 are boiled and washed with hot pure water, and then washed with running water;

[0015] S9. Vacuum dehydrogenation: After the NdFeB permanent magnet material is plated with nickel-boron alloy, vacuum dehydrogenation should be carried out within 4 hours. The parts after nickel-boron alloy plating should be placed in a vacuum dehydrogenation box, and the vacuum degree should be set to 10-1~10-2Pa, the temperature should be set to 180~200℃, and the dehydrogenation time should be 1~2 hours. When the vacuum degree and temperature meet the process requirements, the timing starts until the dehydrogenation is completed. The vacuum dehydrogenation process can effectively remove the hydrogen atoms that have penetrated into the metal lattice through the principle of vacuum negative pressure, greatly improving the dehydrogenation effect and efficiency;

[0016] S10, vacuum heat treatment: put the parts after vacuum dehydrogenation into a vacuum heat treatment furnace, set the vacuum degree to 10-1~10-2Pa, and the temperature to 400~420℃. When the vacuum degree reaches the process requirements, slowly heat up the furnace to the process temperature and start timing. The insulation time is 1h. After the insulation is completed, cool the furnace to ≤100℃ and take it out of the furnace. This heat treatment process can form a precipitation hardening effect, precipitate fine Ni3B particles, and greatly improve the hardness of the coating;

[0017] S11. Inspection: Test the coating appearance, coating thickness, coating bonding strength and coating hardness of the parts.

[0018] Preferably, the solution formula of the acid corrosion in step S3 is 30% to 40% nitric acid and 5 g / L urea as an additive, and the process parameters are temperature 10° C. to 35° C. and time 10s to 30s.

[0019] Preferably, the solution formula of the weak acid activation in step S4 is 20 g / L to 30 g / L of citric acid, and the process parameters are temperature 15° C. to 35° C. and time 1 min to 3 min.

[0020] Preferably, the solution formula of the nickel immersion treatment in step S5 is 70g / L-80g / L nickel acetate, 170ml / L-180ml / L hydrofluoric acid, and 60g / L-70g / L boric acid, and the process parameters are temperature 15°C-35°C and time 0.5min-1min.

[0021] Preferably, the solution formula for nickel electroplating in step S6 is 119g / L~161g / L of nickel sulfate, 51g / L~69g / L of magnesium sulfate, 34g / L~46g / L of sodium sulfate, 21.3g / L~28.8g / L of boric acid, and 12.8g / L~17.3g / L of sodium chloride, and the process parameters are temperature 18°C~40°C, time 15min~20min, current density (hanging plating) 0.5A / dm2~1.0A / dm2, basket plating / roll plating 0.75A / dm2~1.5A / dm2, and pH value 5.4~5.7.

[0022] Preferably, the solution formula of the chemical nickel-boron alloy plating in step S7 is 28g / L~32g / L nickel chloride, 40g / L~50g / L potassium hydroxide, 52g / L~60g / L ethylenediamine, 0.7g / L~0.85g / L potassium borohydride, and 0.04g / L lead nitrate, and the process parameters are temperature 88°C~95°C, pH value 14, and deposition rate 10μm / h~20μm / h.

[0023] Preferably, the solution formula of the hot pure water washing in step S8 is pure water, and the process parameters are temperature 95° C. to 100° C. and time 3 min to 5 min.

[0024] Preferably, the inspection method of step S11 is a 100% visual inspection of the coating appearance. The coating should be semi-glossy to glossy silver-gray, and the coating crystals should be fine, uniform and continuous. The coating thickness can be checked by x-ray fluorescence thickness measurement. The coating adhesion can be checked by filing, scribing and stripping methods. The coating should not peel, fall off or blister. The coating hardness can be tested by a hardness tester.

[0025] Preferably, during the running water cleaning in step S2, a cleaning device is required, and the cleaning device includes a water tank, a cleaning frame is fixedly installed on the top of the water tank, a water inlet frame is also fixedly installed on the top of the water tank, a drain valve is fixedly installed on one end of the water tank, a water pump is fixedly installed on the other end of the water tank, a water pipe is fixedly installed on the output end of the water pump, a diversion frame is fixedly installed on the output end of the water pipe, the diversion frame is fixedly installed on one side of the cleaning frame, a plurality of water outlet pipes are fixedly installed on one side of the diversion frame, and the output ends of the plurality of water outlet pipes are all arranged on the inner side surface of the cleaning frame. A filter frame is fixedly installed on the other side of the cleaning frame, a discharge frame is fixedly installed on one side of the filter frame, a discharge valve is fixedly installed on one end of the discharge frame, a filter plate is fixedly installed on the inner side of the filter frame, a siphon is fixedly installed on the top of the filter frame, the input end of the siphon is arranged at the bottom of the inner side of the cleaning frame, a water adding frame is fixedly installed on the top of the siphon, a sealing cover is threadedly connected to the top of the water adding frame, a reflux valve is fixedly installed on the bottom of the filter frame, a reflux pipe is fixedly installed on the bottom of the reflux valve, and one end of the reflux pipe is fixedly installed on one end of the water tank.

[0026] Preferably, an observation window is fixedly mounted on the front of the discharge frame.

[0027] Compared with the related art, the preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material provided by the present invention has the following beneficial effects:

[0028] The invention provides a preparation method for a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material. The method solves the problems of low corrosion resistance and easy falling of the NdFeB permanent magnet material by subjecting the material to acid corrosion, activation, nickel immersion and chemical nickel-boron plating processes and then vacuum heat treatment, thereby improving the surface hardness of parts and increasing the function and service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A schematic diagram of the process for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material provided by the present invention;

[0030] Figure 2 A schematic structural diagram of a first embodiment of a flowing water cleaning device for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material provided by the present invention;

[0031] Figure 3 for Figure 2 Another perspective structural schematic diagram shown;

[0032] Figure 4 for Figure 2 The schematic diagram of the cross-sectional structure of the filter frame shown;

[0033] Figure 5 The present invention provides a schematic structural diagram of a second embodiment of a flowing water cleaning device for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material.

[0034] Numbers in the figure: 1. water tank, 11. water inlet frame, 12. drain valve, 13. cleaning frame, 2. water pump, 21. water pipe, 22. diversion frame, 23. outlet pipe, 3. filter frame, 31. discharge frame, 32. discharge valve, 33. filter plate, 34. siphon, 35. water adding frame, 36. sealing cover, 37. reflux valve, 38. reflux pipe, 4. observation window. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0036] First embodiment

[0037] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 ,in, Figure 1 A schematic diagram of the process for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material provided by the present invention; Figure 2 A schematic structural diagram of a first embodiment of a water washing device for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material provided by the present invention; Figure 3 for Figure 2 Another perspective structural schematic diagram shown; Figure 4 for Figure 2 The preparation of a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material comprises the following steps:

[0038] S1. Ultrasonic cleaning: To remove tiny metal powders and impurities on the surface and pores of parts, put the parts into an ultrasonic cleaning machine and use Class B pure water for ultrasonic cleaning for 15min to 20min. The ultrasonic cleaning temperature is 10℃ to 40℃.

[0039] S2. Magnesium oxide degreasing: To completely remove the oil stains on the parts, use a clean soft brush dipped in magnesium oxide powder to carefully wipe the surface to be plated 2 to 3 times until the water film on the surface of the parts is uniform, and then wash with running water;

[0040] S3, acid etching: acid etching the parts after the processing in step S2, and then washing them with running water;

[0041] S4, weak acid activation: weak acid activation of the parts after processing in step S3, and then washing with running water;

[0042] S5, nickel immersion treatment: nickel immersion treatment is performed on the parts after the processing in step S4, and then washed with running water;

[0043] S6, nickel electroplating: electroplating nickel on the parts after the processing in step S5, and then washing with running water;

[0044] S7, chemical nickel-boron alloy plating: chemically plating the parts after the processing in step S6 with nickel-boron alloy, and then washing with running water;

[0045] S8, hot pure water boiling and washing: the parts after the processing in step S7 are boiled and washed with hot pure water, and then washed with running water;

[0046] S9. Vacuum dehydrogenation: After the NdFeB permanent magnet material is plated with nickel-boron alloy, vacuum dehydrogenation should be carried out within 4 hours. The parts after nickel-boron alloy plating should be placed in a vacuum dehydrogenation box, and the vacuum degree should be set to 10-1~10-2Pa, the temperature should be set to 180~200℃, and the dehydrogenation time should be 1~2 hours. When the vacuum degree and temperature meet the process requirements, the timing starts until the dehydrogenation is completed. The vacuum dehydrogenation process can effectively remove the hydrogen atoms that have penetrated into the metal lattice through the principle of vacuum negative pressure, greatly improving the dehydrogenation effect and efficiency;

[0047] S10, vacuum heat treatment: put the parts after vacuum dehydrogenation into a vacuum heat treatment furnace, set the vacuum degree to 10-1~10-2Pa, and the temperature to 400~420℃. When the vacuum degree reaches the process requirements, slowly heat up the furnace to the process temperature and start timing. The insulation time is 1h. After the insulation is completed, cool the furnace to ≤100℃ and take it out of the furnace. This heat treatment process can form a precipitation hardening effect, precipitate fine Ni3B particles, and greatly improve the hardness of the coating;

[0048] S11. Inspection: Test the coating appearance, coating thickness, coating bonding strength and coating hardness of parts.

[0049] The solution formula of the acid corrosion in step S3 is 30% to 40% nitric acid and 5g / L urea as an additive, and the process parameters are temperature 10°C to 35°C and time 10s to 30s.

[0050] The solution formula of the weak acid activation in step S4 is 20 g / L to 30 g / L of citric acid, and the process parameters are temperature 15° C. to 35° C. and time 1 min to 3 min.

[0051] The solution formula of the nickel immersion treatment in step S5 is 70g / L-80g / L nickel acetate, 170ml / L-180ml / L hydrofluoric acid, and 60g / L-70g / L boric acid, and the process parameters are temperature 15°C-35°C and time 0.5min-1min.

[0052] The solution formula of nickel electroplating in step S6 is 119g / L~161g / L of nickel sulfate, 51g / L~69g / L of magnesium sulfate, 34g / L~46g / L of sodium sulfate, 21.3g / L~28.8g / L of boric acid, and 12.8g / L~17.3g / L of sodium chloride. The process parameters are temperature 18°C~40°C, time 15min~20min, current density (hanging plating) 0.5A / dm2~1.0A / dm2, basket plating / roller plating 0.75A / dm2~1.5A / dm2, and pH value 5.4~5.7.

[0053] The solution formula of the chemical plating of nickel-boron alloy in step S7 is 28g / L~32g / L of nickel chloride, 40g / L~50g / L of potassium hydroxide, 52g / L~60g / L of ethylenediamine, 0.7g / L~0.85g / L of potassium borohydride, and 0.04g / L of lead nitrate. The process parameters are temperature 88°C~95°C, pH value 14, and deposition rate 10μm / h~20μm / h.

[0054] The solution formula of the hot pure water washing in step S8 is pure water, and the process parameters are temperature 95° C. to 100° C. and time 3 min to 5 min.

[0055] The inspection method of step S11 is a 100% visual inspection of the coating appearance. The coating should be semi-glossy to glossy silver-gray, and the coating crystals should be fine, uniform and continuous. The coating thickness can be checked by X-ray fluorescence thickness measurement. The coating adhesion can be checked by filing, scribing and stripping methods. The coating should not peel, fall off or blister. The coating hardness can be tested by a hardness tester.

[0056] During the running water cleaning in step S2, a cleaning device is required, and the cleaning device includes a water tank 1, a cleaning frame 13 is fixedly installed on the top of the water tank 1, a water inlet frame 11 is also fixedly installed on the top of the water tank 1, a drain valve 12 is fixedly installed on one end of the water tank 1, a water pump 2 is fixedly installed on the other end of the water tank 1, a water pipe 21 is fixedly installed on the output end of the water pump 2, a diverter frame 22 is fixedly installed on the output end of the water pipe 21, the diverter frame 22 is fixedly installed on one side of the cleaning frame 13, a plurality of water outlet pipes 23 are fixedly installed on one side of the diverter frame 22, the output ends of the plurality of water outlet pipes 23 are all arranged on the inner side of the cleaning frame 13, and the cleaning frame 13 A filter frame 3 is fixedly installed on the other side of the filter frame 3, a discharge frame 31 is fixedly installed on one side of the filter frame 3, a discharge valve 32 is fixedly installed on one end of the discharge frame 31, a filter plate 33 is fixedly installed on the inner side of the filter frame 3, a siphon tube 34 is fixedly installed on the top of the filter frame 3, the input end of the siphon tube 34 is arranged at the bottom of the inner side of the cleaning frame 13, a water adding frame 35 is fixedly installed on the top of the siphon tube 34, and a sealing cover 36 is threadedly connected to the top of the water adding frame 35, a reflux valve 37 is fixedly installed on the bottom of the filter frame 3, a reflux pipe 38 is fixedly installed on the bottom of the reflux valve 37, and one end of the reflux pipe 38 is fixedly installed on one end of the water tank 1.

[0057] When in use, the parts to be cleaned are placed into the inner side of the cleaning frame 13, and then the water pump 2 is started to pump out the liquid inside the water tank 1, and then the liquid is transported to the inner side of the cleaning frame 13 through the water pipe 21, the diverter frame 22 and the outlet pipe 23, so that the parts on the inner side of the cleaning frame 13 are cleaned. At the same time, the sewage after cleaning is siphoned into the inner side of the filter frame 3 through the siphon pipe 34, and then filtered through the filter plate 33, and then impurities are accumulated on the inner side of the discharge frame 31, so that the filtered water re-enters the inner side of the water tank 1, and then is transported to the inner side of the cleaning frame 13 again, and circulated in sequence, thereby reducing the waste of water resources;

[0058] When discharge is required, the discharge valve 32 is directly opened to discharge the impurities;

[0059] When using for the first time, close the reflux valve 37, then open the sealing cover 36, pour the liquid into the inner side of the filter frame 3, then close the sealing cover 36, and then open the reflux valve 37, so that the siphon tube 34 can siphon.

[0060] Compared with the related art, the preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material provided by the present invention has the following beneficial effects:

[0061] By subjecting the material to acid corrosion, activation, nickel immersion and chemical nickel-boron plating, followed by vacuum heat treatment, the problems of low corrosion resistance and easy material falling of NdFeB permanent magnet materials are solved, the surface hardness of parts is improved, thereby increasing the function and service life of the product.

[0062] Second embodiment

[0063] Please refer to Figure 5 Based on the preparation of a wear-resistant chemically plated nickel-boron alloy for NdFeB rare earth permanent magnet material provided in the first embodiment of the present application, the second embodiment of the present application proposes another preparation of a wear-resistant chemically plated nickel-boron alloy for NdFeB rare earth permanent magnet material. The second embodiment is only a preferred method of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0064] Specifically, the second embodiment of the present application provides a method for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material. The difference is that in the method for preparing a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material, an observation window 4 is fixedly installed on the front of the discharge frame 31.

[0065] The working principle of the preparation of a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material provided by the present invention is as follows:

[0066] During use, the user can observe the inner side of the discharge frame 31 through the observation window 4. When a large amount of impurities are accumulated inside the discharge frame 31, the discharge valve 32 can be opened to discharge the impurities.

[0067] Compared with the related art, the preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material provided by the present invention has the following beneficial effects:

[0068] The inner side of the discharge frame 31 can be observed conveniently through the observation window 4, so as to discharge the impurities in time.

[0069] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for preparing a wear-resistant chemically plated nickel-boron alloy of a neodymium iron boron rare earth permanent magnet material, characterized in that: The following steps are involved: S1. Ultrasonic cleaning: To remove tiny metal powders and impurities on the surface and pores of parts, put the parts into an ultrasonic cleaning machine and use Class B pure water for ultrasonic cleaning for 15min to 20min. The ultrasonic cleaning temperature is 10℃ to 40℃. S2. Magnesium oxide degreasing: To completely remove the oil stains on the parts, use a clean soft brush dipped in magnesium oxide powder to carefully wipe the surface to be plated 2 to 3 times until the water film on the surface of the parts is uniform, and then wash with running water; S3, acid etching: acid etching the parts after the processing in step S2, and then washing them with running water; S4, weak acid activation: weak acid activation of the parts after processing in step S3, and then washing with running water; S5, nickel immersion treatment: nickel immersion treatment is performed on the parts after the processing in step S4, and then washed with running water; S6, nickel electroplating: electroplating nickel on the parts after the processing in step S5, and then washing with running water; S7, chemical nickel-boron alloy plating: chemically plating the parts after the processing in step S6 with nickel-boron alloy, and then washing with running water; S8, hot pure water boiling and washing: the parts after the processing in step S7 are boiled and washed with hot pure water, and then washed with running water; S9. Vacuum dehydrogenation: After the NdFeB permanent magnet material is plated with nickel-boron alloy, vacuum dehydrogenation should be carried out within 4 hours. The parts after nickel-boron alloy plating should be placed in a vacuum dehydrogenation box, and the vacuum degree should be set to 10-1~10-2Pa, the temperature should be set to 180~200℃, and the dehydrogenation time should be 1~2 hours. When the vacuum degree and temperature meet the process requirements, the timing starts until the dehydrogenation is completed. The vacuum dehydrogenation process can effectively remove the hydrogen atoms that have penetrated into the metal lattice through the principle of vacuum negative pressure, greatly improving the dehydrogenation effect and efficiency; S10, vacuum heat treatment: put the parts after vacuum dehydrogenation into a vacuum heat treatment furnace, set the vacuum degree to 10-1~10-2Pa, and the temperature to 400~420℃. When the vacuum degree reaches the process requirements, slowly heat up the furnace to the process temperature and start timing. The insulation time is 1h. After the insulation is completed, cool the furnace to ≤100℃ and take it out of the furnace. This heat treatment process can form a precipitation hardening effect, precipitate fine Ni3B particles, and greatly improve the hardness of the coating; S11. Inspection: Test the coating appearance, coating thickness, coating bonding strength and coating hardness of the parts.

2. The preparation method of a wear-resistant chemically plated nickel-boron alloy of a NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The solution formula of the acid corrosion in step S3 is 30% to 40% nitric acid and 5g / L urea as an additive, and the process parameters are temperature 10°C to 35°C and time 10s to 30s.

3. The preparation method of the wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The solution formula of the weak acid activation in step S4 is 20 g / L to 30 g / L of citric acid, and the process parameters are temperature 15° C. to 35° C. and time 1 min to 3 min.

4. The preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The solution formula of the nickel immersion treatment in step S5 is 70g / L-80g / L nickel acetate, 170ml / L-180ml / L hydrofluoric acid, and 60g / L-70g / L boric acid, and the process parameters are temperature 15°C-35°C and time 0.5min-1min.

5. The preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The solution formula of nickel electroplating in step S6 is 119g / L~161g / L of nickel sulfate, 51g / L~69g / L of magnesium sulfate, 34g / L~46g / L of sodium sulfate, 21.3g / L~28.8g / L of boric acid, and 12.8g / L~17.3g / L of sodium chloride. The process parameters are temperature 18°C~40°C, time 15min~20min, current density (hanging plating) 0.5A / dm2~1.0A / dm2, basket plating / roller plating 0.75A / dm2~1.5A / dm2, and pH value 5.4~5.

7.

6. The preparation of a wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The solution formula of the chemical plating of nickel-boron alloy in step S7 is 28g / L~32g / L of nickel chloride, 40g / L~50g / L of potassium hydroxide, 52g / L~60g / L of ethylenediamine, 0.7g / L~0.85g / L of potassium borohydride, and 0.04g / L of lead nitrate. The process parameters are temperature 88°C~95°C, pH value 14, and deposition rate 10μm / h~20μm / h.

7. The preparation method of wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The solution formula of the hot pure water washing in step S8 is pure water, and the process parameters are temperature 95° C. to 100° C. and time 3 min to 5 min.

8. The preparation method of wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: The inspection method of step S11 is a 100% visual inspection of the coating appearance. The coating should be semi-glossy to glossy silver-gray, and the coating crystals should be fine, uniform and continuous. The coating thickness can be checked by X-ray fluorescence thickness measurement. The coating bonding strength can be checked by file method, scribing method and stripping method. The coating should not peel, fall off or bubble. The hardness of the coating can be tested with a hardness tester.

9. The preparation method of wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 1, characterized in that: During the running water cleaning in step S2, a cleaning device is required, and the cleaning device includes a water tank, a cleaning frame is fixedly installed on the top of the water tank, a water inlet frame is also fixedly installed on the top of the water tank, a drain valve is fixedly installed on one end of the water tank, a water pump is fixedly installed on the other end of the water tank, a water pipe is fixedly installed on the output end of the water pump, a diversion frame is fixedly installed on the output end of the water pipe, the diversion frame is fixedly installed on one side of the cleaning frame, a plurality of water outlet pipes are fixedly installed on one side of the diversion frame, and the output ends of the plurality of water outlet pipes are all arranged on the inner side of the cleaning frame. A filter frame is fixedly installed on the other side of the washing frame, a discharge frame is fixedly installed on one side of the filter frame, a discharge valve is fixedly installed on one end of the discharge frame, a filter plate is fixedly installed on the inner side of the filter frame, a siphon is fixedly installed on the top of the filter frame, the input end of the siphon is arranged at the bottom of the inner side of the washing frame, a water adding frame is fixedly installed on the top of the siphon, a sealing cover is threadedly connected to the top of the water adding frame, a reflux valve is fixedly installed on the bottom of the filter frame, a reflux pipe is fixedly installed on the bottom of the reflux valve, and one end of the reflux pipe is fixedly installed on one end of the water tank.

10. The preparation method of wear-resistant chemically plated nickel-boron alloy of NdFeB rare earth permanent magnet material according to claim 9, characterized in that: An observation window is fixedly installed on the front of the discharge frame.

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