Iron base amorphous soft-magnetic alloy powder and magnetic powder core containing said powder as well as method for preparing said magnetic powder core
A soft magnetic alloy and magnetic powder core technology, applied in the field of iron-based amorphous soft magnetic alloy powder and magnetic powder core containing the powder
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[0052] The preparation method of the magnetic powder core mainly includes the following steps:
[0053] 1. The above-mentioned iron-based amorphous alloy powder of the present invention is mixed with a binder, an optional insulating agent and an optional lubricant and dried into a dry powder;
[0054] 2. Compression molding;
[0055] 3. Annealing of magnetic powder core;
[0056] 4. Magnetic powder core aging treatment.
[0057] In addition, before the first mixing step, it may optionally include sieving the iron-based amorphous soft magnetic alloy powder. In the optional sieving step, the sieving of the powder in the present invention can be achieved by using experimental sieves, standard slapping vibrating sieves, other types of vibrating sieves and airflow powder classification equipment.
[0058] Step 1: The powder is mixed with a binder and optionally an insulating agent and a lubricant and dried into a dry powder
[0059] The amorphous soft magnetic powder of the p...
Embodiment 1
[0073] The powders in this example are made of iron-based amorphous soft magnetic alloys with different compositions, and are prepared by water atomization, and the atomization pressure is 20 kg / cm 2 , the atomized powder is dried in a vacuum drying oven at 180°C for 8 hours, and then the powder is classified with a slap-type vibrating sieve to obtain -80-+200 mesh, -200-+300 mesh, -300-+400 mesh and -400 mesh powder. Alloy compositions are Fe 76 Cr 1 Mo 1 sn 2 P 8 C 2 B 4 Si 6 , Fe 76 Cr 1 Mo 1 sn 2 P 10 C 2 B 4 Si 4 , Fe 74 Cr 2 Mo 2 sn 2 P 10 C 2 B 4 Si 4 , Fe 72 Cr 4 Mo 2 sn 2 P 10 C 2 B 4 Si 4 , Fe 74 Cr 2 Nb 2 sn 2 P 10 C 2 B 4 Si 4 and Fe 74 Cr 2 Nb 2 al 2 P 10 C 2 B 4 Si 4 .
[0074] The properties of the prepared powders were tested separately. Among them, the powder morphology was observed by scanning electron microscope, the powder morphology was close to spherical and the surface was smooth ( Figure 1~3 ); Powder t...
Embodiment 2
[0088] In this embodiment, the alloy composition is Fe 72 Cr 4 Mo 2 sn 2 P 10 C2 B 4 Si 4 The amorphous soft magnetic powder, the width of the supercooled liquid phase region is 38K, and the preparation method is as described in Example 1. The powder has a saturation magnetic induction of 1.2T. Afterwards, the powders of -100-+200 mesh, -200-+300 mesh, -300-+400 mesh, and -400 mesh of this alloy were used to prepare magnetic powder cores respectively, and the preparation method was as described in Example 1.
[0089] Magnetic powder core properties are shown in Table 3 and Figure 6 , Figure 7 . It can be seen from Table 3 that the magnetic permeability after annealing at 440°C is higher than 60. Depend on Figure 6 It can be seen that the magnetic permeability basically does not change with the test frequency in the frequency range Figure 7 It can be seen that the external field of the DC bias characteristic is about 100Oe when the inductance decays to 50%. In s...
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Abstract
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