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How do magnet manufacturers control the quality of sintered NdFeb

March 11,2023

Nd-fe-b magnet belongs to the third generation of rare earth materials. It is the strongest rare earth permanent magnet in the field of rare earth permanent magnet materials at present, and is also one of the indispensable key parts of industrial manufacturing. Excellent performance of ndFeb magnet can accelerate the pace of the industrial field。

Therefore, to control the quality of ndFeb magnet products is one thing that all sintered NdFeb manufacturers must master.


Sintered Ndfeb final product quality is mainly manifested in the following three aspects:

1, Magnet Performance

Sintered NdFeb raw materials are the most basic prerequisite to ensure the quality of finished products. First of all, we should consider whether the raw materials of NdFeb magnets meet the national standards. Raw material manufacturers will prepare different grades of sintered NdFeb raw materials in advance according to the project requirements. Secondly is the production technology level of magnet manufacturers, and finally look at the quality control in the production process.


2, Magnet shape, Size, Tolerance

The common shapes of NdFeB magnets are round, cylindrical, square, bar, arc and special-shaped. It is usually difficult to achieve a molding in production, which requires multiple processing processes. The processing equipment used by magnets of different shapes is also different. At this time, it is time to test the processing strength of sintered NdFeb manufacturers. The shape, tolerance and size of good NdFeb magnets will eventually be within the requirements of customers.


3, Sintered NdFeb surface coating

Sintered NdFeb because of its easy corrosion characteristics, So we need the final electroplating process processing.

Common magnet coatings are Zn, nickel, nickel copper nickel, gold, epoxy and others, control the plating process time, after the plating process to confirm good coating thickness, coating color and brightness as well as the adhesion of the coating, and can be observed through the appearance of the magnet surface smooth, no spots, no corners, to assess the overall quality of the magnet product.