Mu90 iron, silicon and nickel magnetic powder core material and method for manufacturing same

A magnetic powder core, FeSiNi technology, applied in the field of μ90 FeSiNi magnetic powder core material and its preparation, can solve the problems of high overall loss, high eddy current loss, reduced coercivity, etc. The effect of reducing coercivity and reducing impurities

Active Publication Date: 2014-05-28
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, doping a small amount of Nb and V elements can inhibit the oxidation of the iron-silicon alloy, prevent oxide inclusions in the grains, reduce the coercive force, and reduce the hysteresis loss of the magnetic core, but the trace amount of Nb and V elements The incorporation of Fe-Si alloy basically has no effect on the resistivity, and the eddy current loss is relatively high, so the overall loss of Fe-Si core is relatively high

Method used

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  • Mu90 iron, silicon and nickel magnetic powder core material and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 86 parts by weight of industrial iron ingots and 6 parts by weight of silicon ingots, and put them into a vacuum of 6.7×10 -3 The initial smelting is carried out in a vacuum intermediate frequency induction furnace of Pa, and an appropriate amount of SiO is added 2 , used to remove slag. The smelting temperature is 1460°C, the smelting time is 1h, and the iron-silicon binary alloy ingot is obtained by cooling with the furnace. The iron-silicon binary alloy ingot is crushed with a crusher to obtain fragments with a diameter of 3 cm, and 8 parts by weight of nickel powder with a particle size of -300 mesh are evenly mixed into the fragments, and secondary melting is carried out in a vacuum intermediate frequency induction furnace. The melting temperature is 1470°C and the melting time is 1.5h. After the alloy is smelted, it directly enters the tundish of the vacuum air atomization powder making machine, sprays the powder with nitrogen, collects the gas atomized po...

Embodiment 2

[0029] Weigh 82 parts by weight of industrial iron ingots and 8 parts by weight of silicon ingots, and put them into a vacuum of 6.7×10 -3 The initial smelting is carried out in a vacuum intermediate frequency induction furnace of Pa, and an appropriate amount of SiO is added 2 , used to remove slag. The smelting temperature is 1600°C, the smelting time is 1h, and the iron-silicon binary alloy ingot is obtained by cooling with the furnace. The iron-silicon binary alloy ingot is crushed with a crusher to obtain fragments with a diameter of 6 cm, and 10 parts by weight of nickel powder with a particle size of -300 mesh is evenly mixed into the fragments, and secondary melting is carried out in a vacuum intermediate frequency induction furnace. The melting temperature is 1600°C and the melting time is 1.5h. After the alloy is smelted, it directly enters the tundish of the air atomization powder making machine, sprays the powder with nitrogen, collects the aerosol powder, and si...

Embodiment 3

[0031] Weigh 91 parts by weight of industrial iron ingots and 4 parts by weight of silicon ingots, and put them into a vacuum of 6.7×10 -3 The initial smelting is carried out in a vacuum intermediate frequency induction furnace of Pa, and an appropriate amount of SiO is added 2, used to remove slag. The smelting temperature is 1500°C, the smelting time is 1h, and the iron-silicon binary alloy ingot is obtained by cooling with the furnace. The iron-silicon binary alloy ingot is crushed with a crusher to obtain fragments with a diameter of 4 cm, and 5 parts by weight of nickel powder with a particle size of -300 mesh are evenly mixed into the fragments, and secondary melting is carried out in a vacuum intermediate frequency induction furnace. The melting temperature is 1500°C and the melting time is 1.5h. After the alloy is smelted, it directly enters the tundish of the air atomization powder making machine, sprays the powder with nitrogen, collects the aerosol powder, and sie...

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Abstract

The invention discloses a method for manufacturing a mu90 iron, silicon and nickel magnetic powder core material. The method includes steps of primarily melting 82-91wt% of iron and 4-8wt% of silicon to obtain a mixture; adding 5-10wt% of nickel powder into the mixture and secondarily melting the nickel powder and the mixture to form iron, silicon and nickel ternary alloy; spraying mist to manufacture powder; treating the surface of the powder; performing mold pressing on the powder and forming a material; performing heat treatment on the material and spraying paint on the surface of the material to obtain the iron, silicon and nickel magnetic powder core material. The invention further discloses the mu90 iron, silicon and nickel magnetic powder core material manufactured by the method. The method and the mu90 iron, silicon and nickel magnetic powder core material have the advantages that a magnetic core manufactured by the method is low in cost and consumption and high in direct-current superposition performance.

Description

technical field [0001] The invention relates to the technical field of soft magnetic materials, in particular to a μ90 Fe-Si-Ni magnetic powder core material and a preparation method thereof. Background technique [0002] Metal magnetic powder cores have the advantages of high saturation magnetic induction, high Curie temperature and constant magnetic permeability, and are widely used in high-current power devices. With the gradual promotion of solar power generation and wind power generation, the magnetic core used in the inverter is required to have high DC superposition characteristics, low loss and good frequency stability. At present, the magnetic cores widely used in this field are mainly iron-silicon magnetic powder cores, iron-silicon magnetic powder cores, low cost, high DC superposition performance, but high loss, generally Pcv=2100mw / cm 3 (100k, 100mT), the heat is relatively serious, which is not conducive to the energy saving and high efficiency of the device. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147H01F1/20C22C33/06C23C22/03B22F1/00C22C38/08
Inventor 张章明金天明金旭东包大新
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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