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Neodymium Magnet

Date:2019-9-19 2:51:57 Hits:47

Neodymium Magnet

Neodymium magnet (aka NdFeB magnet), is the third generation of rare earth magnet, which is composed of Neodymium, Iron, Boron and a few transition metals. With high remanence, high coercive force, high energy product, and high performance /cost, Neodymium magnet is currently the strongest magnet available in the world.


Manufacturing Process


Neodymium, Iron, Boron and a few transition metals will be mixed into the Neodymium powder, then fine Neodymium powder will be compacted in a die and sintered, fusing the powder in a solid state. There are two ways of pressing: die pressing and isostatic pressing. Sintered parts normally need some finish machining in order to meet final tolerances.


Machining & Tolerance

 

Generally, Neodymium magnet must be machined using diamond-grinding techniques. Sometimes, machining operations may be performed on Neodymium materials with carbide tools, but surface finishes thus obtained may be less than optimal. The Standard tolerances for Neodymium magnet is +/- 0.1mm for ground dimensions, but stricter tolerances are possible if specially required.


Surface treatments


The corrosion resistance of Neodymium magnet is considered poor. Surface coating or plating is therefore highly recommended. Almost all kinds of surface coatings are available, like Nickel, Zn, Ni-Cu-Ni, Gold, Silver, Sn, Chrome. We also apply special surface protection to Neodymium magnet, like ABS(Plastic) coating, Rubber coating, PTFE(Teflon) coating, stainless steel case and Epoxy coating etc.


Magnetizing & Packing


Neodymium magnet requires magnetizing fields with extremely high power, and can be magnetized in any direction as long as it is aligned properly. In some instances, multiple pole magnetization is possible with special fixtures. All Neodymium magnet is anisotropic and can only be magnetized in the orientation direction, so particular consideration must be given when designing complex assemblies, if it is intended to magnetize after installation.


Neodymium magnet is mechanically weak but magnetically very strong. They should be packed properly in order to help all users to handle them safely.



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