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What are the factors affecting ndfeb magnet demagnetization?

by:Newland     2020-04-09
Powerful magnets generally refers to the ndfeb magnets, mainly by rare earth neodymium praseodymium and common elements of iron alloy, this material has wide application in the market at present, but the powerful magnets in use process will often encounter magnetic weaken or disappear is often happens, we summarize the cause of the strong magnet demagnetization demagnetization mainly include the following: 1, after baking oven magnet demagnetization. 2, try the magnet itself and high magnetic field magnet force disappearing or N/S pole change ( Charger demagnetization machine) 。 3, magnet demagnetization after injection or demagnetization, ndfeb N series of minimum heat resistance is 80 ℃, and sometimes injection basic is above 120 ℃, so the short time of 2 seconds to 3 seconds of injection molding, may cause some demagnetization. 4, magnet material contains too much lead to weak magnetic impurities. This is the most common results showed purchasers. Because shopping around on the quote, choose low price. Customer requirements over there is obviously use N35 grades, the results offer low adverse manufacturers use N28, N33 materials, customers don't expect can be detected, if up to 30 k, is slowly by fluxmeter measure? It's really important, a reliable and stable suppliers. Not that price and how would it be possible to use N35 material to do for you? And some ndfeb magnet is used for packaging, can suck anyway, garbage is waste of material. 5, material containing metal Lan cause magnet powder, etc. 6, ndfeb magnet demagnetization after hot pressing, often used glass fiber board hot pressing, temperature above 150 ℃. 7, impact to result magnet demagnetization, such as high collision frequency, etc. , to be very careful in the process of transportation. A: what are the typical features of ndfeb magnet? Next: what are the powerful magnets little common sense?
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