A Fe-based bulk permanent magnet alloy with excellent coercive force and preparation method thereof
A permanent magnet alloy, coercive force technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem of low coercivity of bulk permanent magnet materials, achieve excellent coercivity, overcome the complex processing technology, The effect of expanding the field of application
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[0022] Example 1
[0023] The composition (atomic percentage) of the Fe-based bulk alloy with hard magnetism in this embodiment is: Fe 63%, Nd 7%, Nb6, and B 24%. The preparation process and steps are as follows: 20 grams of industrial pure metal raw materials Fe, Nd, Nb and FeB alloy are prepared according to the Fe-based bulk alloy composition of this embodiment, and then smelted in a vacuum non-consumable electric arc furnace under argon protection , Melting current density is 150A / cm 2 , The alloy is repeatedly smelted 4 times to obtain a master alloy; after remelting the master alloy, it is poured by a copper mold negative pressure suction casting method to obtain a bulk amorphous alloy with a size of 1mm×10mm×80mm. Put the above bulk amorphous alloy at 690℃, the vacuum degree is 4×10 -3 Under Pa conditions, vacuum annealing is performed for 20 minutes, and finally the Fe-based bulk permanent magnet alloy with excellent coercivity of the present invention is prepared.
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