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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Embodiment 1
[0024] A method for vacuum aluminum plating on the surface of an NdFeB permanent magnet, wherein the following steps are sequentially included:
[0025] (1) First, use wet polishing to treat the surface of NdFeB magnets 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 from the surface of the NdFeB permanent magnet;
[0026] (2) Put the NdFeB permanent magnet on the rotating workpiece rack in the coating chamber, start the vacuum pump on the coating chamber, and vacuum the coating chamber to a degree of 3×10 -2 Pa, and heated to keep the temperature of the NdFeB permanent magnet at 280°C;
[0027] (3) Start the vacuum pump on the coating chamber, when the vacuum chamber reaches the process design value of 10 -2 After Pa, carry out argon ion bombardment cleaning, which is a process of glow discharge, h...
Embodiment 2
[0032] A method for vacuum aluminum plating on the surface of an NdFeB permanent magnet, wherein the following steps are sequentially included:
[0033] (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: 70 parts of water, 10 parts of glass beads, 0.5 part of potassium sorbate, The working pressure is 0.1MPa, and the polishing angle is 30 degrees from the surface of the NdFeB permanent magnet;
[0034] (2) Put the NdFeB permanent magnet on the rotating workpiece rack in the coating chamber, start the vacuum pump on the coating chamber, and vacuum the coating chamber to a vacuum degree of 5×10 -2 Pa, and heated to keep the temperature of the NdFeB permanent magnet at 250 °C;
[0035] (3) Start the vacuum pump on the coating chamber, when the vacuum chamber reaches the process design value of 10 -2 After Pa, carry out argon ion bombardment cleaning, which is a process of glow di...
Embodiment 3
[0040] A method for vacuum aluminum plating on the surface of an NdFeB permanent magnet, wherein the following steps are sequentially included:
[0041] (1) First, use wet polishing to treat the surface of the NdFeB magnet with a size of 10×10×10 mm. The weight ratio of each component in the abrasive is: 85 parts of water, 23 parts of glass beads, 5 parts of sodium phytate, The working pressure is 0.3MPa, and the polishing angle is 60 degrees from the surface of the NdFeB permanent magnet;
[0042] (2) Put the NdFeB permanent magnet on the rotating workpiece rack in the coating chamber, start the vacuum pump on the coating chamber, and vacuum the coating chamber to a vacuum degree of 8×10 -2 Pa, and heated to keep the temperature of the NdFeB permanent magnet at 300°C;
[0043] (3) Start the vacuum pump on the coating chamber, when the vacuum chamber reaches the process design value of 10 -2 After Pa, carry out argon ion bombardment cleaning, which is a process of glow disch...
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