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Home >> News >>Company News >> Starting from '4 angles', teach you how to judge the quality of sintered NdFeB magnets.
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Starting from '4 angles', teach you how to judge the quality of sintered NdFeB magnets.

Sintered NdFeB magnets are also called "permanent magnets" and are widely used in industrial permanent magnet motors, electronic products, energy vehicles, etc., because of their high cost performance, they play an important role in the technological progress and social progress of today's society. .



Square double countersunk strong magnet, sintered NdFeB magnet

Since the global industrialization in 1985, the demand for magnets has increased dramatically worldwide, and the magnet industry has flourished. As the global market develops, the number of magnet manufacturers is also increasing. Then, from the customer's point of view, how to judge the quality of sintered NdFeB magnets? There are three ways to do this.



Powerful magnet round counterbore


First, judge from the performance of the magnet


The performance of the magnet is directly related to the production of raw materials to the manufacturing process of the factory. Purchasing raw materials according to national standards, according to the company's high-grade or mid-range or low-grade sintered NdFeB magnets, the advanced technology of the manufacturer determines the performance of the magnet and Quality, the more advanced technology produces the higher the performance.



Sintered NdFeB Shaped Magnet - Bowl Shape


Second, consider the direction of the magnetic field of the magnet


In terms of the direction of the magnetic field, China is a country that uses only two steps of compaction in the world. Oriented small vertical pressure forming, quasi-isostatic pressing, which is one of the important characteristics of the sintered NdFeB magnet industry, and also a technology that China is proud of.



NdFeB shaped magnet


Third, judge from the production process


Monitoring is also very important in the production process, and can be controlled by SC sheet thickness measurement and JM powder particle size distribution. High quality products depend on the control of the production process, but customers will be confused, how to judge the performance of the products I purchased? Some measuring instruments can be used to test whether it meets the national standards. Customers can also select magnetic based on magnet parameters Br (remanence), Hcb (coercive force), Hcj (intrinsic coercivity), (BH)max (magnetic energy product). Parameters to meet your needs, according to your own product requirements.



Strong magnet shaped-cylindrical strong-order head magnet


Fourth, can be determined according to the surface of the magnet


Magnets are used in different industries, and their shapes and sizes are different. The production process has also undergone many steps. Generally speaking, sintered NdFeB magnets can be obtained by three methods: cutting, shape processing and punching, and good quality. The surface of the magnet is also very smooth and requires a certain degree of precision.


Therefore, a qualified sintered NdFeB magnet not only has better performance, but also the tolerance of the size will affect the use. The tolerance depends on the strength of the factory and the craftsmanship of the employees.



Sintered NdFeB magnet racetrack-shaped epoxy black

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