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Sendust alloy magnetic powder core preparation method

A technology of magnetic powder core and alloy powder, applied in the field of preparing Sendaiste alloy magnetic powder core, can solve the problems of increasing oxygen content, poor magnetic loss performance, increasing stress, etc. Effect

Inactive Publication Date: 2018-01-09
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

And the Super Sendaisite alloy on the market, such as the patent of invention whose authorized announcement number is CN 103551565 B discloses a kind of manufacturing method of soft magnetic silicon-aluminum-nickel alloy powder, its main process is to make thin strips after smelting, and then A series of processes such as crushing and ball milling, the process of crushing and ball milling not only increases the stress in the process, but also greatly increases the oxygen content, and the magnetic loss performance is very poor

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  • Sendust alloy magnetic powder core preparation method

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Effect test

Embodiment 1

[0047] A method for preparing a Sendaiste alloy magnetic powder core, comprising the following steps:

[0048] Step 1: Preparation of alloy powder: take the following metal raw materials in mass percentages: 4% aluminum, 6% silicon, 3.27% nickel, and the rest are iron, and the alloy melt is obtained after metal smelting at a temperature of 1650 ° C. Said alloy melt adopts liquid nitrogen as protective gas, adjusts the pressure of the spray plate to be 45bar, and the spraying flow rate is 15Kg / min for gas atomization to obtain alloy powder;

[0049] Step 2: Alloy powder insulation coating treatment: after the alloy powder is sieved, add a phosphoric acid solution accounting for 0.5% by weight of the alloy powder for passivation, and after drying, add 0.5% by weight of the alloy powder The percentage is 0.5% low-melting point glass powder, stir evenly, then add the silicone resin that accounts for 1% by weight of the alloy powder, stir evenly, and finally add zinc stearate accou...

Embodiment 2

[0052] A method for preparing a Sendaiste alloy magnetic powder core, comprising the following steps:

[0053] Step 1: Preparation of alloy powder: take the following metal raw materials in mass percentages: 4% aluminum, 6% silicon, 3.27% nickel, and the rest are iron. After metal smelting at a temperature of 1400 ° C, an alloy melt is obtained. Said alloy melt adopts liquid nitrogen as a protective gas, adjusts the pressure of the spray plate to 50bar, and sprays the powder at a flow rate of 7Kg / min for gas atomization to obtain alloy powder;

[0054] Step 2: Alloy powder insulation coating treatment: After the alloy powder is sieved, add a phosphoric acid solution accounting for 0.1% by weight of the alloy powder for passivation, and after drying, add 0.1% by weight of the alloy powder The percentage is 0.5% low-melting point glass powder, stir evenly, then add silicone resin that accounts for 2.5% by weight of the alloy powder, stir evenly, and finally add zinc stearate acc...

Embodiment 3

[0057] A method for preparing a Sendaiste alloy magnetic powder core, comprising the following steps:

[0058] Step 1: Prepare alloy powder: take the following metal raw materials in mass percentages: 4% aluminum, 6% silicon, 3.27% nickel, and the rest are iron. After metal smelting at a temperature of 1800 ° C, an alloy melt is obtained. Said alloy melt adopts liquid nitrogen as the protective gas, adjusts the pressure of the spray plate to 5bar, and sprays the powder at a flow rate of 30Kg / min for gas atomization to obtain the alloy powder;

[0059] Step 2: Alloy powder insulation coating treatment: after the alloy powder is sieved, add a phosphoric acid solution accounting for 5% by weight of the alloy powder for passivation, and after drying, add The percentage is 0.5% low-melting point glass powder, stir evenly, then add the silicone resin that accounts for 0.5% by weight of the alloy powder, stir evenly, finally add zinc stearate accounting for 0.5% by weight of the allo...

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Abstract

The invention provides a sendust alloy magnetic powder core preparation method. The method includes: step one, preparing alloy powder, to be more specific, subjecting metal raw materials including aluminum, silicon, nickel and iron to metal smelting to obtain alloy melt, and preparing the alloy melt into alloy powder according to a gas atomization method; step two, insulation coating treatment ofthe alloy powder; step three, magnetic powder core spraying insulating treatment. By direct preparation of the super sendust alloy powder according to the gas atomization method, production proceduresare reduced, stress caused by shaping processes including crushing, ball milling and the like is eliminated, the oxygen content of a prepared sendust alloy magnetic powder core is reduced, and magnetic performances of the sendust alloy magnetic powder core are improved. In addition, by insulation coating treatment of the alloy powder, a super sendust alloy powder core appropriate in magnetic conductivity and low in loss can be obtained.

Description

technical field [0001] The invention belongs to the technical field of magnetic material preparation, and in particular relates to a method for preparing a Sendaiste alloy magnetic powder core. Background technique [0002] As early as the early 1970s, in order to improve the brittleness of sendust soft magnetic alloy materials, some researchers developed a composition of Fe 86.73 Ni 3.27 Si 6 al 4 (wt.%) alloy is named as Super-Sendus alloy, that is, Super Sendaiste alloy. In terms of alloy properties, Super Sentai Alloy has higher maximum magnetic permeability, saturation magnetization and Curie temperature than Sentai Alloy (Silicon Aluminum Alloy) and improves the workability and plasticity of the alloy. [0003] At present, most of the Sendai Stern alloy is made by gas atomization powder. Since the powder obtained by gas atomization powder is spherical, the effective demagnetization coefficient is large, and the fluidity is better than that of crushed sendust. For ...

Claims

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Application Information

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IPC IPC(8): H01F1/147H01F1/26B22F1/02C21D1/26
Inventor 纪杰江志滨庞靖
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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