Manufacturing method for soft-magnetic Fe-Si-Al-Ni alloy powder

A kind of alloy powder, manufacturing method technology

Inactive Publication Date: 2014-02-05
武汉欣达磁性材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pulverization of iron-nickel alloys (Ni81 Mo2, Fe50 Ni50) and iron-silicon alloys (Fe-6.5Si, FeSi6 Al4 Ni3.2) can only be produced by atomization, especially the atomized powder of iron-silicon alloys. The formability of the pressed product is poor, the magnetic core loss of the pressed product (magnetic powder core) of the water atomized powder is large, and the cost of the gas atomized powder is high

Method used

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  • Manufacturing method for soft-magnetic Fe-Si-Al-Ni alloy powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) The alloy is smelted in a nominal 500kg induction heating vacuum quick-setting furnace. Industrial pure iron, polysilicon, pure aluminum, pure nickel, manganese metal, ferrophosphorus alloy and sponge titanium are put into the furnace for smelting in a certain proportion, and they are quickly solidified into flakes under vacuum protection. The mass percentage content of its chemical composition is: Si4.50%, Al4.0%, Ni1.50%, P0.30%, Mn0.20%, Ti0.40%, C0.012%, O280PPm, N230PPm, the rest is Fe ;

[0017] 2) Break the above-mentioned alloy flakes into 3-10mm granular flakes by mechanical crushing method;

[0018] 3) Carry out hydrogen protection heat treatment on the obtained granular flakes at a temperature of 1050°C for 3 hours;

[0019] 4) Put the heat-treated pellets into a ball mill to grind them into a fine powder of -100 mesh (<150μm);

[0020] 5) Carry out nitrogen protection heat treatment on the above-mentioned fine powder, the temperature is 800 ℃, keep war...

Embodiment 2

[0025] 1) The smelting of the alloy and the preparation of thin flakes are the same as in Example 1. The mass percentage content of the chemical composition of the alloy is: Si5.0%, Al3.0%, Ni1.50%, P0.50%, Mn0. 40%, Ti0.10%, C0.010%, O 2BOPPm, N235ppm, the rest is Fe;

[0026] 2) The thin flakes are mechanically crushed into 3-10mm granular flakes;

[0027] 3) The heat treatment of the sheet material is the same as that of Example 1-3, the heat treatment temperature is 1150°C, and the holding time is 2 hours;

[0028] 4) Ball milling of pellets and flakes is the same as that of Example 1-4;

[0029] 5) The heat treatment of the fine powder is the same as that of Example 1-5, the heat treatment temperature under nitrogen protection is 880°C, and the temperature is kept for 4 hours;

[0030] 6) Electromagnetic properties of the alloy: μo is 2350Gs / oe, μm is 19500Gs / Oe, Hc is 0.16Oe, ρ is 68μΩ . ,cm.

Embodiment 3

[0032] 1) Alloy smelting and thin flakes are the same as in Example 1-1. The chemical composition of the alloy is as follows: Si4.0%, Al3.5%, Ni1.50%, P0.10%, Mn0.10 %, Ti0.25%, C0.008%, O 2 80ppm, N 2 30ppm, the rest is Fe;

[0033] 2) The thin flakes are mechanically broken into 3-10mm granular flakes;

[0034] 3) The heat treatment of the granular flakes is protected by hydrogen, the temperature is 950 ° C, and the temperature is kept for 2 hours;

[0035] 4) Put the processed pellets into a ball mill and grind them into a fine powder of -100 mesh;

[0036] 5) The fine powder will be subjected to nitrogen protection heat treatment at a temperature of 900°C for 4 hours;

[0037] 6) Electromagnetic properties of the alloy; μ 0 It is 2400Gs / Oe, μm is 19000Gs / Oe, Hc is 0.15Oe, and ρ is 70μΩ·cm.

[0038] Magnetic properties of alloy powder: jHc 1.14Oe, Ms 190.0emu / g, Mr 0.12 emu / g.

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Abstract

A manufacturing method for soft-magnetic Fe-Si-Al-Ni alloy powder comprises smelting alloy formed by 4.0% to 5.0% of Si, 3.0% to 4.0% of Al, 1.0% to 2.5% of Ni, 0.1% to 0.4% of Ti, 0.1% to 0.4% of Mn, 0.1% to 0.5% of P, 0.02% or less of C, and the balance Fe through an induction heating vacuum rapid solidification furnace, performing rapid solidification on the alloy to manufacture sheet materials, and subjecting the sheet materials to mechanical crushing, thermal processing of crushed materials, ball milling of the materials into fine powder, annealing treatment and screening and particle size distribution. The method has the advantages that the smelting alloy material is pure, the alloy saturation induction density Bs is more than 18000 gausses, and the adding of Ni can guarantee that the alloy magnetostriction coefficient is zero; excellent soft magnetic properties are provided during magnetic powder core manufacturing, and the AC / DC superposition performance is good particularly when the magnetic conductivity of pressed products is mu e60, for example, when AC is 100 KHz, DCH is equal to 50 Oe, mu 50 >=88% mu O, and the magnetic core loss is lower than that of the high-flux Fe50 Ni50 magnetic powder core, so that the soft-magnetic Fe-Si-Al-Ni alloy powder can replace Fe50 Ni50 and Fe-Si alloy magnetic powder cores to be used in electronic and electric industries.

Description

Technical field [0001] The invention is a manufacturing method for magnetic objects -especially the manufacturing method of iron, silicon, aluminum -nickel alloy powder with soft magnetic characteristics. Background technique [0002] In recent years, with the advancement of science and technology, the improvement of environmental protection and energy -saving requirements has prompted the electronics and electrical industries to carry out research and development in smallcant and high efficiency directions. The metal soft magnetic powder core has received great attention because of the production of this material.Electronic components have the functions of energy storage and electromagnetic conversion. The specific application is the switching power supply for manufacturing control and conversion. The early used iron nickel alloy magnetic powder core is restricted by the market due to its high price.Subsequently, a large number of pure iron powder cores were used, but its magnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C22C38/14C22C33/04C21D1/74B22D11/06B22F9/04H01F1/147H01F1/20
Inventor 刘善宜祝家贵刘志文王锋
Owner 武汉欣达磁性材料有限公司
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