Permanent magnet material is a new type of magnetic material, also known as hard magnetic material. And NdFeb permanent magnet material is the third generation of rare earth permanent magnet materials, its application can greatly reduce the volume and quality of the machine, such as in the disk application, can make the disk drive miniaturization, and also have better performance. In audio devices, NdFeb is widely used in micro speakers, earphones and high-end car speakers, greatly improving the sound fidelity and signal-to-noise ratio. In addition, it can also be applied to DC motor and NUCLEAR magnetic resonance imaging, especially in the application of magnetic levitation train not only a large number, but also can achieve high-speed transportation, safety, reliability and low noise characteristics.
To sum up, NdFeb is a high-tech new material, and NdFeb permanent magnet processing method has sintering method and bonding method, to sintering type output. Sintered NdFeb production adopts powder metallurgy process, the surface is loose and porous, and the grain boundary is neodymium-rich phase potential is negative, so the corrosion resistance is very poor, the permanent magnet after corrosion will greatly affect its magnetic properties and service life.
At present, the use of electroplating method to provide a protective layer on the surface of NdFeb, high-quality coating is the guarantee of high quality and long life of NdFeb permanent magnet. It can be seen that the new permanent magnet NdFeb is closely related to the surface treatment industry, and as this industry, Xinfeng magnetic material enjoys a high reputation in the industry.
Post time: Aug-28-2021