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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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 elemen

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  • FeNi-based amorphous soft magnetic alloy and preparation method of soft magnetic alloy
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[0070] Example 1

[0071] The smelting component is Fe 38 Ni 38 B 21.5-d-e Si d P e Nb 2.5 Amorphous alloy rods of different diameters were prepared by copper mold casting method, 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 the amorphous rod, the larger the critical diameter, the more amorphous structure can be obtained even at a slow cooling rate, which means high amorphous forming ability. Amorphous alloy strips with different B, P and Si contents were prepared by single-roll rapid quenching method, and the calorimetric physical 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 min, 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 with d...

Example Embodiment

[0083] Example 2

[0084] Smelting of different total Fe and Ni 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, prepare amorphous alloy rods with different diameters by copper mold casting method, determine the critical diameter of the alloy, and calibrate the forming ability of the alloy. Amorphous strips with different total Fe and Ni contents were prepared by the single-roll rapid quenching method, and the thermophysical parameters of the amorphous alloy were tested by DSC. The strips were placed in a tube furnace at T g Heat treatment at -50°C for 10min to 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 total Fe and Ni 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 of ...

Example Embodiment

[0093] Example 3

[0094] Smelting Fe with different Ni contents a Ni 78-a B 14.2 Si 2.75 P 2.75 Nb 2.3 Alloy, amorphous alloy rods of different diameters are prepared by copper mold casting method, the critical diameter of the alloy is determined, and the amorphous forming ability of the alloy is calibrated. Amorphous strips with different Ni contents were prepared by the single-roll rapid quenching method, and the thermophysical parameters were tested by DSC. The strips were placed in a tube furnace at T g Heat treatment at -50°C for 10min to 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, and they are the same atoms, and their atomic radii are similar, 0.124 and 0.125, respectively; the mixing enthalpies of Fe and Ni atoms and other atoms in the composition ...

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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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