Sintered NdFeB permanent magnets such as neodymium magnetsare manufactured by the method of powder metallurgy. The process flow is as follows:
Raw material handling→ Burdening→ Smelting→ Milling→ Magnetic field orientation and pressure type→ Sintering densification→ Tempering aging→ Machining and surface treatment→ Testing.
It can be seen from the technological process that the whole process is a systematic project, especially for high performance Nd-Fe-B permanent magnetic materials, each process has the "right to decide" and "the right of negation" for the performance of the product.
In order to produce high-performance NdFeB permanent magnetic material, the manager of the enterprise should pay attention to every link of the production process and guide the staff to pay attention to every detail in the process. This is to ask employees to do the most basic "four prevention" work which includes anti-oxidation, anti-confusion, anti-impurity, and moisten prevention.
In order to ensure the quality of the sintered NdFeB permanent magnetic materials, our daily basic work should be carried out according to the "four prevention", that is, from the prevention of oxidation, anti confusion, anti impurity and damp proof.