The performance and quality of powerful magnets are better than ferrites. The powerful NdFeB magnets can absorb 640 times more weight than themselves, which is why they are called "Magnet King".
The quality of NdFeB magnet is evaluated from two aspects: 1. product performance; 2. product appearance
1. Product performance:
Strong NdFeB magnets are unified standards, and the main indicators are remanence, coercive force, magnetic energy product brand, etc. Strong NdFeB magnets of different specifications and sizes can be distinguished by Gauss, and the quality and performance of this magnet can be distinguished by Gauss. The coercivity can only pass the magnetic characteristic tester. Generally, there is no such condition for users to test.
2. Product appearance:
The product appearance can be inspected mainly in five aspects:
(1) Pits: including bubbles. Scar, electroplating tumor, slag layer and local excessive thickness;
(2) Edge cracking: edge collapse and material residue;
(3) Scratches: knife marks, line marks, nail scratches, etc;
(4) Cracks: cracks, etc;
(5) Sand holes: pinholes, air holes, particles, etc., also depends on whether there are missing edges and corners around, whether the electroplating is intact, and whether the size meets the design requirements. The dual NdFeB magnets are coated to prevent the magnet surface from corrosion and rust. The same specification can be placed on an adsorbable plane to identify the magnetic force.
If users compare the requirements for strong magnets, the demagnetization curve can be used to analyze and measure the magnetic properties of magnets.
The above is the method for testing the quality of powerful NdFeB magnets , hoping to help you quickly identify the quality of powerful magnets.
