Strong Neodymium Magnets Quality Inspection Method

Update:12-11-2021
Summary:

  Strong magnets have better performance and quality th […]

  Strong magnets have better performance and quality than ferrites. Strong neodymium magnets can absorb 640 times heavier than themselves. This is where the title of "magnet king" is derived.

  I don’t know the quality of the strong magnets I bought on the market? I still don’t let others know that you are a layman. Is there any quick way to test the quality of strong neodymium magnets?

  Detecting the quality of powerful NdFeB magnets is mainly evaluated from two aspects: 1. Product performance, 2. Product appearance

  1. Product performance:

  Strong neodymium magnets are all unified standards, and the main indicators we understand are remanence, coercivity, magnetic energy product grades, etc. Strong neodymium magnets of different specifications and sizes can be distinguished by Gaussian sum, and the quality and performance of this magnet can be distinguished by Gaussian. The coercive force can only be tested by the magnetic characteristic tester, generally, there is no such condition for the user to test.

  2. Product appearance:

  It can be used to inspect the appearance of the product, mainly in 5 aspects:

  (1) Pockmarks: including bubbles. Scars, electroplating tumors, slag layer, local too thick;

  (2) Edge: chipping, residual material;

  (3) Scratches knife marks, line marks, nail scratches, etc.;

  (4) Cracks: cracks, etc.;

  (5) Sand holes: pinholes, pores, particles, etc., depending on whether there are missing edges or corners around, whether the electroplating is intact, and whether the size meets the design requirements. The neodymium iron boron magnets are coated to prevent the surface of the magnet from being damaged. Corrosion and rust. The same specification is placed on a surface that can be absorbed, which can be used to distinguish the size of the magnetic force.

  If you compare the user's requirements for powerful magnets, you can use the demagnetization curve category to analyze and understand the magnetic properties of the measured magnets.

  The above is the method to detect the quality of strong neodymium magnets, hoping to help you how to quickly identify the quality of strong magnets.

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