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Method for manufacturing high insulation resistor FeSiCr metal soft-magnetic material

A metal soft magnetic and manufacturing method technology, applied in the direction of inductor/transformer/magnet manufacturing, magnetic materials, circuits, etc., can solve the problems of non-densification, low insulation resistance, low withstand voltage, etc., and achieve the effect of overcoming low insulation resistance

Active Publication Date: 2017-06-09
TDG HLDG CO LTD
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Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide a method for manufacturing a high insulation resistance FeSiCr metal soft magnetic material, which effectively overcomes the defects of low insulation resistance, low withstand voltage, uneven coating, and lack of density in the traditional process. The insulation resistance IR of the high insulation resistance FeSiCr metal soft magnetic material made by the method of the present invention is greater than 1GΩ, the withstand voltage is greater than 100V, and the magnetic permeability is 60 (1 ± 20%)

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  • Method for manufacturing high insulation resistor FeSiCr metal soft-magnetic material
  • Method for manufacturing high insulation resistor FeSiCr metal soft-magnetic material

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Embodiment Construction

[0028] A kind of manufacture method of high insulation FeSiCr metal soft magnetic material, concrete steps are as follows:

[0029] (1) Melting: carried out in a melting furnace, the melting temperature is 1580 ℃ ~ 1680 ℃, the silicon content in the main component is 3.5 ~ 7.0wt%, the Cr content is 4.5 ~ 6.0wt%, the balance is iron and unavoidable Mn, Ni, C, S, P, O and other impurities, wherein the unavoidable sum of Mn, Ni, C, S, P, O and other impurities is less than 0.25wt%.

[0030] (2) Gas and water combined atomization: use gas and water combined atomization to control the O content in the powder to less than 0.15wt%. figure 1 shown;

[0031] (3) Screening: Screening with different meshes;

[0032] (4) Powder grading ratio: -500 mesh accounts for 55%, -600 mesh accounts for 35%, and -800 mesh accounts for 10%;

[0033] (5) Mixing: It is carried out in a three-dimensional motion mixer, and the powder after grading and proportioning is evenly mixed;

[0034] (6) Powder ...

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Abstract

The invention discloses a method for manufacturing a high insulation resistor FeSiCr metal soft-magnetic material. The method includes melting; gas and water combined atomization; screening; powder classification matching; mixing; powder passivating; stirring and coating; pelletizing; compression moulding; and sintering. (6) powder passivating: preheating powder to the temperature of 75-90 DEG C, adding a mixed solution of 0.1-0.35 wt% of manganese phosphate and 0.1-0.35 wt% of chromium phosphate with respect to the powder, performing stirring for 10-15 min, performing drying at the temperature of 120 DEG C for 2 hours, and performing screening through a 100-mesh screen. The method can effectively overcome the defects that the insulation resistance is low, the withstand voltage is low, and the coating layer is not even and is not compact in the conventional processes; and according to the high insulation resistor FeSiCr metal soft-magnetic material acquired by the method, the insulation resistance IR is greater than 1G Ohm, the withstand voltage is greater than 100 V, and the magnetic conductivity is 60 (1+ / -20%).

Description

technical field [0001] The invention relates to a method for manufacturing a metal soft magnetic material, in particular to a method for manufacturing a high insulation resistance FeSiCr metal soft magnetic material. Background technique [0002] At present, MnZn, NiZn or NiCuZn ferrite can be generally used as the material of the magnetic material of the inductance part, and they have higher magnetic permeability and resistivity at high frequency (10 2 ~10 8 Ω·cm), but due to its relatively low saturation flux density Bs, the DC bias characteristics of the device are insufficient. In recent years, electronic terminal products continue to develop in the direction of miniaturization, integration, and high current. In order to meet this requirement, the technology of converting the material of the magnetic body from the existing ferrite to FeSiCr metal soft magnetic material is emerging. . Compared with ferrite, the saturation magnetic flux density of FeSiCr metal soft magn...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F41/02
CPCH01F1/14766H01F41/0266
Inventor 马占华杨代权孙蒋平赵栋骏李小龙吴利强
Owner TDG HLDG CO LTD
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