Vacuum aluminizing method of surface of neodymium-iron-boron permanent magnet
A technology of vacuum aluminum plating and permanent magnets, applied in vacuum evaporation plating, sputtering plating, ion implantation plating, etc., can solve the problems of reduced corrosion resistance, no practical value, and inability to meet the requirements of working conditions, etc.
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[0023] Example 1
[0024] The vacuum aluminum plating method on the surface of the neodymium iron boron permanent magnet includes the following steps in sequence:
[0025] (1) First, use wet polishing to treat the surface of the NdFeB magnet with a size of 10×10×10mm. The weight ratio of each component in the abrasive is: 77.5 parts of water, 16.5 parts of glass beads, and 2.7 parts of sodium carbonate. The pressure is 0.2MPa, and the polishing angle is 45 degrees with the surface of the NdFeB permanent magnet;
[0026] (2) Put the neodymium iron boron permanent magnet on the rotating workpiece holder in the coating chamber, start the vacuum pump on the coating chamber, and evacuate the coating chamber, the vacuum degree is 3×10 -2 Pa, and heating to keep the temperature of the NdFeB permanent magnet at 280℃;
[0027] (3) Start the vacuum pump on the coating chamber, when the vacuum chamber reaches the process design value of 10 -2 After Pa, perform argon ion bombardment cleaning, whi...
Example Embodiment
[0031] Example 2
[0032] The vacuum aluminum plating method on the surface of the neodymium iron boron permanent magnet includes the following steps in sequence:
[0033] (1) First, use wet polishing to treat the surface of a NdFeB magnet with a size of 10×10×10mm. The weight ratio of each component in the abrasive is: 70 parts of water, 10 parts of glass beads, and 0.5 parts of potassium sorbate. The working pressure is 0.1MPa, and the polishing angle is 30 degrees with the surface of the NdFeB permanent magnet;
[0034] (2) Put the neodymium iron boron permanent magnet on the rotating workpiece holder in the coating chamber, start the vacuum pump on the coating chamber, and evacuate the coating chamber, the vacuum degree is 5×10 -2 Pa, and heating to keep the temperature of the NdFeB permanent magnet at 250℃;
[0035] (3) Start the vacuum pump on the coating chamber, when the vacuum chamber reaches the process design value of 10 -2 After Pa, perform argon ion bombardment cleaning, ...
Example Embodiment
[0039] Example 3
[0040] The vacuum aluminum plating method on the surface of the neodymium iron boron permanent magnet includes the following steps in sequence:
[0041] (1) First, use wet polishing to treat the surface of the NdFeB magnet with a size of 10×10×10mm. The weight ratio of each component in the abrasive is: 85 parts of water, 23 parts of glass beads, and 5 parts of sodium phytate. The working pressure is 0.3MPa, and the polishing angle is 60 degrees with the surface of the NdFeB permanent magnet;
[0042] (2) Put the neodymium iron boron permanent magnet on the rotating workpiece holder in the coating chamber, start the vacuum pump on the coating chamber, and evacuate the coating chamber, the vacuum degree is 8×10 -2 Pa, and heating to keep the temperature of the NdFeB permanent magnet at 300℃;
[0043] (3) Start the vacuum pump on the coating chamber, when the vacuum chamber reaches the process design value of 10 -2 After Pa, perform argon ion bombardment cleaning, whi...
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