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3 reasons for the demagnetization of NdFeB magnets

Many people have such a common problem, "Why is the magnetic force weakened after the NdFeB powerful magnet is not used for a long time, which is what we often say demagnetization?"


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NdFeB magnetic ring


Most people think that it is a problem for manufacturers. They think that they use inferior materials, or they feel that the production process is not good. In fact, the neodymium iron boron strong magnet demagnetization on the one hand has the manufacturer's reasons, but mainly because the method used is wrong, so the magnet quickly demagnetizes.



Counterbore magnet


What are the reasons for the magnet demagnetization?


First, the use of neodymium iron boron strong magnets at high temperatures quickly demagnetize!


Note that when buying a magnet, be sure to tell the manufacturer how high the magnet needs to be used, so that the manufacturer can choose different high temperature resistant materials to make the finished product according to the different environments.



Powerful magnet square - nickel plated


The temperature resistance of materials with different magnets is also very different, so it should be purchased according to the characteristics of their own products, so that the phenomenon of magnet demagnetization does not occur.



Powerful magnet rectangle - galvanized


Second, in the violent knocking or high-frequency impact will also cause the NdFeB strong magnet to appear fragmentation and cause the magnet magnetic force is not enough, because the magnet itself is more brittle, so try to avoid it.



Strong magnet round


Third, the magnet material contains too much impurities will also lead to weak magnetic, this is the reason for the manufacturers, some bad businesses will be greedy for small cheap, clearly the customer is required to N35, the result manufacturers use N28 materials to do, customers do not expect Can be detected, if the number reaches 30K, is it necessary to use the flux meter to measure one by one?



Strong magnet with holes


Therefore, I would like to remind everyone that it is very important to buy a strong magnet of NdFeB in a large quantity. It is very important to find a supplier with strong reputation and good reputation. This will save a lot of unnecessary troubles in cooperation. If the long-term cooperation is in price, There are great deals.


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