Strong magnets not only have requirements on the working environment but also on the indoor environment. Compared with ferrite magnets, AlNiCo and Samarium Cobalt, its magnetic performance greatly exceeds that of other magnets. NdFeB magnets can absorb 640 times the weight of their own weight, so NdFeB magnets are often called by outsiders. For strong magnets, strong magnets can be magnetized and demagnetized, because the magnet itself is or more magnetic. What are the reasons for the demagnetization of strong magnets sometimes?
However, in normal times, we still prefer the AC demagnetization method, which is more effective than the high-temperature demagnetization method and the vibration demagnetization method and has a high demagnetization efficiency. It is the most widely used method in industrial production.
High-temperature demagnetization method:
The primary operation of the high-temperature demagnetization method is to put the magnet into a high-temperature furnace for heating. After high-temperature treatment, the magnetism of the strong magnet will be removed, but during the heating process, the effect of high temperature will directly lead to The structure of the object inside the magnet undergoing dramatic changes.
Therefore, this method of demagnetization is generally used for scrapped and recovered magnets. The operation of this method is very simple. It vibrates the strong magnet strongly and violently. After the vibration operation, the internal structure of the magnet is changed, and then the physical properties of the magnet are changed. Generally speaking, this demagnetization method is used. The effect is not great, only a small amount of demagnetization can be used temporarily.
This method of demagnetization is to put the magnet into a space that can generate an AC magnetic field. After being disturbed by the AC magnetic field, the internal structure of the magnet will be disrupted, and then the effect of demagnetization can be achieved. This method is relatively common. Demagnetization method.
