Manufacturing method of soft magnetic silicon-aluminum-nickel alloy powder

A kind of alloy powder, manufacturing method technology

Inactive Publication Date: 2016-08-17
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

But the iron-nickel alloy (Ni 81 Mo 2 , Fe 50 Ni 50 ) and iron-silicon alloy (Fe-6.5Si, FeSi6Al4Ni3.2) can only be produced by atomization method, especially the atomized powder of iron-silicon alloy has poor formability when making pressed products later, and the water atomized powder The magnetic core loss of the pressed product (magnetic powder core) is large, and the cost of the gas atomized powder is high

Method used

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  • Manufacturing method of soft magnetic silicon-aluminum-nickel 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%, O 2 80PPm,N 2 More than 30PPm is Fe;

[0017] 2) The above-mentioned alloy flakes are broken into 3-10mm particle flakes by a mechanical crushing method;

[0018] 3) Carrying out hydrogen protection heat treatment on the obtained granular flakes at a temperature of 1050° C. and keeping it warm for 3 hours;

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

[0020] 5) Carry out nitrogen protection heat treatment on the above-mentioned fi...

Embodiment 2

[0025] 1) The smelting of the alloy and the obtained thin sheet material, with the one of embodiment one, the mass percentage content of the chemical composition of the alloy is: Si5.0%, Al3.0%, Ni 1.50%, P0.50%, Mn0.40 %, Ti0.10%, C0.010%, O 2 BOPPm,N 2 More than 35ppm is Fe;

[0026] 2) The 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) pellet ball milling is the same as that of Embodiment 1-4;

[0029] 5) The heat treatment of the fine powder is the same as that of Example 1-5, and 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 making flakes are the same as in Example 1, the rolling percentage of the chemical composition of the alloy is: 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 flakes are mechanically crushed into 3-10mm granular flakes;

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

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

[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 0.12emu / 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 belongs to a manufacturing method of a magnetic object—especially a manufacturing method of sendust aluminum-nickel alloy powder with soft magnetic properties. 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 the direction of miniaturization and high efficiency. Metal soft magnetic powder cores have received great attention, because this material is made of Advanced electronic components have the functions of energy storage and electromagnetic conversion. The specific application is to manufacture control and conversion switching power supplies. The iron-nickel alloy magnetic powder cores used in the early days were restricted by the market due to their high prices. Looking for new cheap materials, Subsequently, a large numbe...

Claims

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Application Information

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Patent Type & Authority Patents(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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