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FeNi-based amorphous soft magnetic alloy and preparation method of soft magnetic alloy

A soft magnetic alloy and soft magnetic alloy ribbon technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of low content of ferromagnetic element FeNi, low alloy forming ability, low saturation magnetic induction intensity, etc., to achieve excellent soft Magnetic and mechanical properties, high amorphous forming ability, large critical size effect

Active Publication Date: 2013-01-09
朗峰新材料启东有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Chinese patent application CN1066745A discloses a FeNiCrSiBP amorphous alloy, which can be heat-treated in air, but the forming ability of the alloy is low, and cannot reach the forming ability of preparing ribbon, rod or block samples, and antiferromagnetic The addition of element Cr leads to a significant decrease in the saturation magnetic induction
Compared with the currently used iron-nickel amorphous soft magnetic alloys, although the above two alloys have improved amorphous forming ability, due to the addition of a large amount of amorphous forming elements, the content of ferromagnetic element FeNi is low, resulting in a significant saturation magnetic induction. reduce
The reduction of saturation magnetic induction is not conducive to the miniaturization and high efficiency of devices, and the high production and application costs significantly affect its application as a soft magnetic material
[0011] In the existing amorphous soft magnetic alloys, the improvement of soft magnetic properties and mechanical properties often restrict each other, and it is difficult to improve the properties of the alloy at the same time

Method used

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Experimental program
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Effect test

Embodiment 1

[0071] Melting composition is Fe 38 Ni 38 B 21.5-d-e Si d P e Nb 2.5 The alloys were prepared by copper mold casting method to prepare amorphous alloy rods with different diameters, the critical diameter of the alloy was determined, and the amorphous forming ability of the alloy was calibrated. Specifically, by calculating the critical diameter of an amorphous rod, the larger the critical diameter, the amorphous structure can be obtained even at a slow cooling rate, which means that it has a high ability to form amorphous. Amorphous alloy strips with different B, P and Si contents were prepared by single-roll rapid quenching method, and the thermophysical parameters of the amorphous alloy were tested by DSC. Put the strip into the tube furnace at T g Heat treatment at -50°C for 10 minutes, and test the magnetic properties of the strip after heat treatment. The test performance is shown in Table 1.

[0072]

[0073]

[0074]Table 1 Properties of amorphous alloys w...

Embodiment 2

[0084] Smelting of different Fe and Ni total contents (Fe 0.5 Ni 0.5 ) a+b (B 0.646 Si 0.125 P 0.125 Nb 0.104 ) 100-a-b Alloy, using the copper mold casting method to prepare amorphous alloy rods with different diameters, determine the critical diameter of the alloy, and calibrate the forming ability of the alloy. The amorphous strips with different Fe and Ni total contents were prepared by single-roll rapid quenching method, and the thermal physical parameters of the amorphous alloy were tested by DSC, and the strips were put into the tube furnace at T g Heat treatment at -50°C for 10 minutes, and test the magnetic properties of the strip. The test performance is shown in Table 2:

[0085]

[0086] Table 2 Properties of amorphous alloys with different Fe and Ni total contents

[0087] The increase of the total content of Fe and Ni leads to the decrease of the content of amorphous forming elements, but the alloy composition is closer to the eutectic point, the role...

Embodiment 3

[0094] Melting Fe with different Ni content a Ni 78-a B 14.2 Si 2.75 P 2.75 Nb 2.3 Alloy, prepare amorphous alloy rods with different diameters by copper mold casting method, determine the critical diameter of the alloy, and calibrate the amorphous forming ability of the alloy. Amorphous strips with different Ni content were prepared by single-roll rapid quenching method, and the thermal physical parameters were tested by DSC. The strips were put into the tube furnace at T g Heat treatment at -50°C for 10 minutes, and test the magnetic properties of the strip. The test performance is shown in Table 3:

[0095]

[0096] Table 3 Properties of amorphous alloys with different Ni contents

[0097] In this system, the physical and chemical properties of Fe and Ni are similar, they are the same kind of atoms, and their atomic radii are similar, 0.124 and 0.125 respectively; The content of Ni does not obviously affect the close-packed structure of the system, and the format...

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Abstract

The invention discloses a FeNi-based amorphous soft magnetic alloy, of which the formula is FeaNibBcSidPeNbf, wherein a, b, c, d, e and f are atomic percentages; the FeNi-based amorphous soft magnetic alloy is characterized in that a is not less than 10 and not more than 75; b is not less than 5 and not more than 70; c is not less than 4 and not more than 24; d is not less than 0.1 and not more than 15; e is not less than 1 and not more than 14 and f is not less than 0.01 and not more than 6; moreover, the sum of a and b is not less than 72 and not more than 84, and the sum of a, b, c, d, e and f is 100 percent. The FeNi-based amorphous soft magnetic alloy has the characteristics of high content of FeNi elements, large critical dimension, high amorphous formation capacity, excellent soft magnetic performance and mechanical property; the breaking strength is more than 3.3 Gpa and the compressive ductility is more than 7 percent. In addition, the invention further provides a method for preparing FeNi-based amorphous soft magnetic alloy belts or rods.

Description

technical field [0001] The invention relates to an amorphous alloy and a preparation method thereof, in particular to an FeNi-based amorphous soft magnetic alloy with high amorphous forming ability, excellent soft magnetic properties and mechanical properties and a preparation method thereof. Background technique [0002] Since its appearance in 1967, amorphous soft magnetic alloys have attracted great attention immediately, and have become one of the hotspots in material research in recent decades. Amorphous soft magnetic alloys show good soft magnetic properties due to their irregular arrangement of atoms, aperiodicity, and no grain boundaries, few pinning points or pinning lines of magnetic domains, and small magnetic crystal anisotropy. : Small coercive force, high magnetic permeability, high magnetic induction, high resistivity, low loss, good frequency characteristics. Widely used in the field of power electronics, it can greatly promote the development of various ele...

Claims

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Application Information

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IPC IPC(8): H01F1/153C22C45/00C22C45/02C22C45/04
Inventor 沈宝龙
Owner 朗峰新材料启东有限公司
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