Amorphous magnetic powder core and preparation method thereof
A magnetic powder core and amorphous technology, applied in the field of amorphous magnetic powder core and its preparation, can solve the problems of large coercive force, high loss, low magnetic permeability, etc., and achieve excellent comprehensive magnetic properties
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[0035] The preparation method of the amorphous magnetic powder core in the present invention specifically involves the following steps:
[0036] S1, the alloy raw material is smelted in a smelting furnace to prepare a master alloy;
[0037] S2, prepare corresponding amorphous powder with the master alloy;
[0038] S3, mixing the amorphous powder in a proportion to obtain an amorphous mixed powder;
[0039] S4, insulating and coating the amorphous mixed powder to obtain an amorphous coating powder;
[0040] S5, adding a lubricant to the amorphous coated powder, and stirring and mixing to obtain an amorphous finished powder;
[0041] S6, subjecting the amorphous finished powder to pressing treatment, sintering treatment, annealing treatment and curing treatment to obtain a magnetic powder core base block;
[0042] S7, subjecting the magnetic powder core base block to surface coating treatment to obtain an amorphous magnetic powder core.
[0043] In step S1, the present inven...
Embodiment 1
[0047] The chemical composition expression of the master alloy for the iron-based amorphous alloy is Fe 76 Si 7.5 B 7 C 4 Ni 1.5 Cr 3, the corresponding amorphous powder is prepared from the master alloy, and then mixed in a conventional powder ratio. After conventional insulation coating treatment, pressing treatment, sintering treatment, annealing treatment, curing treatment and surface coating treatment , the corresponding magnetic powder core can be prepared.
[0048] Specifically, the powder ratio is 100-150 mesh accounting for 10%, 150-200 mesh accounting for 50%, 200-270 mesh accounting for 30%, 270-400 mesh accounting for 10%, and the prepared magnetic powder core The permeability is 60, the DC bias capacity is 55%, and the loss is 310mw / cm3@50k, 100mT.
Embodiment 2
[0050] The chemical composition expression of the master alloy for the iron-based amorphous alloy is Fe 75 Si 8 B 7 C 4 Mo 1 Cr 5 , the corresponding amorphous powder is prepared from the master alloy, and then mixed in a conventional powder ratio. After conventional insulation coating treatment, pressing treatment, sintering treatment, annealing treatment, curing treatment and surface coating treatment , the corresponding magnetic powder core can be prepared.
[0051] Specifically, the powder ratio is 100-150 mesh accounting for 10%, 150-200 mesh accounting for 50%, 200-270 mesh accounting for 30%, 270-400 mesh accounting for 10%, and the prepared magnetic powder core The permeability is 60, the DC bias capacity is 51%; the loss is 186mw / cm3@50k, 100mT.
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