China permanent magnet manufacturer: www.rizinia.com

The best degaussing method of NdFeB strong magnet

You are here:
< All Topics

How to demagnetize NdFeB magnets? A small number of customers have asked this question. Today, NdFeB magnets manufacturers come to talk with you.
Permanent magnets require special manufacturing techniques in the magnetic field to keep the metal aligned correctly. In order to demagnetize the magnet, you need to change this alignment. This process usually requires a lot of heat or a strong magnetic field with opposite polarity to the magnet to be demagnetized.
1High temperature heating magnet
Heating the magnet causes the electrons inside to rotate and usually move to a higher energy state, which makes them end up in the opposite position to other electrons nearby. As a result, the electrons are no longer aligned, so the magnetism of the whole object is reduced. Finally, the whole area of the magnet is not aligned correctly and the magnet is demagnetized. The temperature at which this happens is called the Curie temperature. The temperature depends on the material in the magnet, for example, for low carbon steel, it can be as high as 1390 degrees Fahrenheit (770 degrees Celsius).
2Place the magnet in a reverse magnetic field
You can also eliminate the magnetism of a magnet by placing it in a reverse magnetization field. This will oppose the magnetism of the object. You can do this by passing AC current through a component of the magnet. This is how the demagnetization tool works.
3Impact magnet
If the magnet is impacted in such a way that the alignment of the north and south poles of the magnet is destroyed, the magnet will usually lose its magnetism. If the inner part of the magnet is forcibly aligned, it will lose its magnetism, and in theory, this can happen by any violent means, including drilling the magnet or hitting it with a pick or other tool that may cause physical damage to the object. If the grains inside the magnet are no longer properly aligned, it will no longer work, just as it does when the magnet is subjected to high heat.
4. Use magnet for a long time
Any heat can cause the magnet to lose its magnetism. A small amount of heat, such as at room temperature, will have this effect for a longer time. For example, for a simple flat magnet, the loss of its magnetic properties will take longer than human life.
For NdFeB magnets, the best degaussing scheme is pulse demagnetizer or high temperature demagnetization. The above content is about the introduction of magnet degaussing method. I hope it can help you.

Previous The advantages and disadvantages of Nd-Fe-B magnetic material and its process introduction
Next The production process of magnet: isostatic pressing
Table of Contents
Inquery now

SUBSCRIBE TO OUR NEWSLETTER

FOLLOW US

العربية简体中文繁體中文NederlandsEnglishFrançaisDeutschItaliano日本語한국어PortuguêsРусскийEspañolไทย

Email me
Mail to us