The factors that affect the processing accuracy of magnets are closely related to processing equipment, tools, processing techniques, and the technical level of operators. In addition, the microstructure of the material also has a significant impact on the machining accuracy of the magnet. For example, magnets with coarse main phase grains are prone to pitting on the machined surface;

The usual production process for Nd-Fe-B sintered magnets is as follows: melting alloy casting → powder making → oriented pressing → sintering → tempering → magnetic property testing → blank finishing → cutting → precision grinding → semi-finished product inspection → electroplating → finished product inspection → packaging and warehousing.

Industrialized production of various magnets with no/low heavy rare earth content. Through formula optimization and casting structure optimization, the grain size of the magnet has been refined, while the microstructure has also been optimized, reducing the dependence of high-performance magnets on heavy rare earth dysprosium and terbium, and reducing material costs.  

Grain boundary diffusion technology can reduce the amount of heavy rare earth and effectively save heavy rare earth resources; Reduce the production cost of magnets and improve the comprehensive cost-effectiveness of products. For magnets with the same performance, grain boundary diffusion technology uses less heavy rare earth elements than traditional technology. Compared with traditional technology, grain boundary diffusion technology can prepare magnets with higher comprehensive performance, such as 54SH, 54UH, 50EH, 45AH, 42TH; Some of the magnets have Hcj (kOe)+(BH) max (MGOe)>82....

When a magnet is magnetized by an external magnetic field in a closed circuit environment until it reaches technical saturation and then the external magnetic field is removed, the magnetic induction intensity exhibited by the magnet is called remanence. It represents the maximum magnetic flux value that a magnet can provide. From the demagnetization curve, it can be seen that it corresponds to the situation when the air gap is zero, so the magnetic induction intensity of the magnet in the actual magnetic circuit is smaller than that of residual magnetism. Neodymium iron boron is the highest Br practical permanent magnet material discovered today....