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Manufacturing method of Fe-Ni50series alloy powder and magnetic powder core

A technology of alloy powder and manufacturing method, which is applied in the field of Fe-Ni50 series alloy powder and magnetic powder core manufacturing, can solve the problems of high internal resistance, low loss, unspecified magnetic permeability and AC-DC superposition performance, etc., to improve the resistivity , the effect of reducing power loss and improving filling rate

Inactive Publication Date: 2007-07-18
武汉欣达磁性材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The recent Japanese Patent Application No. 2005-82853 adds Cr and Mn each 0.4Nt% / less than 0.8wt% to the Fe-50wt% Fe-Ni soft magnetic alloy, and the water atomization powder produces a spherical shape with low loss. High internal resistance, vacuum smelting, loss 243-284kw / m 3 , the magnetic permeability and AC / DC superposition performance are not specified

Method used

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  • Manufacturing method of Fe-Ni50series alloy powder and magnetic powder core
  • Manufacturing method of Fe-Ni50series alloy powder and magnetic powder core
  • Manufacturing method of Fe-Ni50series alloy powder and magnetic powder core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put industrial pure iron, nickel plate, metal manganese, and sponge titanium into an induction furnace protected by nitrogen gas for smelting, and the chemical composition of smelting is 49-50% nickel, 0.1-0.6% manganese, 0.1-0.6% titanium, and Mn+Ti≥ 0.6%, the rest is iron alloy steel liquid, spray the liquid steel into -100 mesh powder by water spray cooling method, dry the powder at about 100 ℃, process it into flakes by mechanical method, enter the heat treatment furnace, under the protection of hydrogen , 800°C±20°C reduction treatment for 2-4 hours, after cooling, sieve it, according to 100-200 mesh, it accounts for 10±5%, 200-320 mesh accounts for 50±5%, and the rest is fine powder less than 320 mesh. Adjust the particle size of the powder, and then passivate the surface of the powder with an acidic solution to form a coating film on the surface of the alloy powder, use fine mica powder or kaolin for insulation, the dosage is 0.2-1.0%, and use sodium silicate solu...

Embodiment 2

[0019] Embodiment 2: The process procedure is the same as that of Example 1, and its alloy composition is: Ni: 49.6%, Mn: 0.5%, Ti: 0.2%, and the balance is Fe. The basic parameters of its magnetic properties are shown in Table 2:

[0020] The data in Table 2 shows that, compared with Example 1, the content of Mn and Ti has some changes, the decrease of magnetic permeability after AC superimposition does not change much, and the loss slightly increases, but is lower than that of commercial products.

Embodiment 3

[0022] The process procedure is the same as that of Example 1, and its alloy composition is: Ni: 49.8%, Mn: 0.4%, Ti: 0.6%, and the remainder is Fe. The basic parameters of its magnetic properties are shown in Table 3:

[0023] The data in Table 3 shows that compared with Example 1, the contents of Mn and Ti have increased, and the magnetic permeability after AC superimposition decreases slightly faster, μe=81%μ 0 Its loss decreased slightly, which may be the effect of finer grains.

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Abstract

The present invention relates to a preparation method of soft magnetic Fe-Ni50 system alloy powder. Said method includes the following steps: smelting Fe-Ni50 system alloy, spraying to obtain powder by adopting water atomization process, processing said powder, making heat treatment, passivation treatment, adding insulating agent, lubricating agent and demoulding agent into the alloy powder, mould-pressing and forming, heat treatment and coating surface.

Description

technical field [0001] The invention relates to the technical field of manufacturing magnetic objects, in particular to a Fe-N i50 It is a manufacturing method of alloy powder and magnetic powder core. Background technique [0002] In recent years, the rapid development of the electronic power industry requires the energy saving and miniaturization of electronic equipment and instruments along with the high efficiency and miniaturization of electronic components and components. at a frequency of 10kH z -500kH z A large number of iron powder cores are used in the range, but the power loss is relatively large, and the effective magnetic permeability is about 75. Fe-Ni50 alloy magnetic powder core, also known as high-flux magnetic powder core, has high saturation magnetic flux density and low core loss, and is used as a magnetic device with high frequency, high power, high DC bias or high peak AC flux density Iron cores have advantages. Among the magnetic powder cores, the...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 王茜王锋
Owner 武汉欣达磁性材料有限公司
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