Surface coating method for improving coercive force of rare earth permanent magnet
A technology of surface coating and rare earth permanent magnets, which is applied in the field of surface coating of rare earth permanent magnets to improve the coercive force, can solve the problems of increased cost of magnets, and achieve high coercive force, high coercivity, and simple operation Effect
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Embodiment 1
[0018] A kind of rare earth permanent magnet improves the surface coating method of coercive force, and its method comprises the following steps:
[0019] A. Use a laser coating machine to spray the rare earth mixture on the surface of the permanent magnet;
[0020] B. Carry out heat treatment to the permanent magnet after spraying.
[0021] Under the premise of not introducing too many impurity additives and affecting the structure of the permanent magnet (corrosion, oxidation, etc.), the coercive force of the permanent magnet can be greatly improved by using less rare earth (the coercive force of the permanent magnet is on the original basis 5000A / m above), effectively reducing the production cost of permanent magnets, without affecting its remanence and magnetic energy product, and its coercive force is greatly improved. At the same time, its operation process is simple and suitable for large-scale industrial applications.
[0022] The rare earth mixed solution in step A i...
Embodiment 2
[0030] A kind of rare earth permanent magnet improves the surface coating method of coercive force, and its method comprises the following steps:
[0031] A. Use a laser coating machine to spray the rare earth mixture on the surface of the permanent magnet;
[0032] B. Carry out heat treatment to the permanent magnet after spraying.
[0033] Under the premise of not introducing too many impurity additives and affecting the structure of the permanent magnet (corrosion, oxidation, etc.), the coercive force of the permanent magnet can be greatly improved by using less rare earth (the coercive force of the permanent magnet is on the original basis 5000A / m above), effectively reducing the production cost of permanent magnets, without affecting its remanence and magnetic energy product, and its coercive force is greatly improved. At the same time, its operation process is simple and suitable for large-scale industrial applications.
[0034] The rare earth mixed solution in step A i...
Embodiment 3
[0042] A kind of rare earth permanent magnet improves the surface coating method of coercive force, and its method comprises the following steps:
[0043]A. Use a laser coating machine to spray the rare earth mixture on the surface of the permanent magnet;
[0044] B. Carry out heat treatment to the permanent magnet after spraying.
[0045] Under the premise of not introducing too many impurity additives and affecting the structure of the permanent magnet (corrosion, oxidation, etc.), the coercive force of the permanent magnet can be greatly improved by using less rare earth (the coercive force of the permanent magnet is on the original basis 5000A / m above), effectively reducing the production cost of permanent magnets, without affecting its remanence and magnetic energy product, and its coercive force is greatly improved. At the same time, its operation process is simple and suitable for large-scale industrial applications.
[0046] The rare earth mixed solution in step A is...
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