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A nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and its preparation method

A nanocrystalline soft magnetic, iron-based amorphous technology, applied in the direction of magnetic objects, magnetic materials, metal material coating technology, etc., can solve the problems of low nitriding temperature, short nitriding time, poor toughness, etc., to achieve nitriding Low nitrogen temperature, short nitriding time, good corrosion resistance

Active Publication Date: 2020-08-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the deficiencies in this field, the present invention provides a method for preparing a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy, which promotes the rapid nitriding reaction, avoids long-term high-temperature treatment, and has the advantages of nitriding The characteristics of low temperature and short nitriding time can be used for large-area continuous nitriding treatment, which overcomes the problem of iron-based amorphous crystallization in the nitriding process, and solves the problem of poor toughness and difficult processing of iron-based amorphous soft magnetic alloys after nitriding It has the advantages of simple and efficient, low cost, controllable product quality and suitable for large-scale production.

Method used

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  • A nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and its preparation method
  • A nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and its preparation method
  • A nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and its preparation method

Examples

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Effect test

Embodiment 1

[0061] Preparation of nitrogen-containing iron-based amorphous soft magnetic alloy strips, the chemical formula is (Fe 90 Zr 7 B 3 ) 99.75 N 0.25 .

[0062] (1) Elemental Fe, Zr and B are uniformly mixed according to the above stoichiometric ratio, and an arc melting furnace is used to prepare a parent soft magnetic alloy ingot with uniform composition.

[0063] (2) Grinding the surface impurities of the parent soft magnetic alloy ingot obtained in step (1) with a grinding wheel, and then placing it in a single-roll quick quenching device to obtain the original iron-based amorphous soft magnetic alloy strip (original iron-based amorphous) . The obtained original iron-based amorphous soft magnetic alloy strip has a smooth surface and a thickness of 23 μm, and the XRD pattern is as follows figure 1 As shown, it has a completely amorphous structure.

[0064] (3) Plasma nitriding treatment is carried out to the original iron-based amorphous soft magnetic alloy strip that st...

Embodiment 2

[0069] The nitrogen-containing iron-based amorphous soft magnetic alloy strip prepared in Example 1 is subjected to high vacuum heat treatment to obtain a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy strip (nitrogen-containing iron-based nanocrystalline), and the heat treatment temperature is 630 ° C , the processing time is 1h.

[0070] The nitrogen content of the obtained nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy strip is 900ppm, the saturation magnetic induction is 1.63T, and the corrosion rate is 0.11mm / a under the condition that the corrosion medium is 0.5M NaCl solution, which has excellent Saturation magnetic induction and corrosion resistance.

[0071] The XRD pattern of the obtained nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy strip is as follows figure 1 As mentioned, the transmission electron microscope photos are as follows image 3 As shown, the grain size of the n...

Embodiment 3

[0073] Preparation of nitrogen-containing iron-based amorphous soft magnetic alloy strips, the chemical formula is (Fe 84 Nb 7 B 9 ) 99.85 N 0.15 .

[0074] (1) Elemental Fe, Nb and B are uniformly mixed according to the above stoichiometric ratio, and an arc melting furnace is used to prepare a parent soft magnetic alloy ingot with uniform composition.

[0075] (2) Grinding the surface impurities of the parent soft magnetic alloy ingot obtained in step (1) with a grinding wheel, and then placing it in a single-roll quenching device to obtain iron-based amorphous soft magnetic alloy strips. The obtained iron-based amorphous soft magnetic alloy strip has a smooth surface and a completely amorphous structure.

[0076] (3) plasma nitriding treatment is carried out to the iron-based amorphous soft magnetic alloy strip that step (2) obtains, adopting-300V pulse bias voltage, frequency is 40kHz, and duty cycle is 20%, and arc plasma source current is 50A, The nitriding tempera...

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Abstract

The invention discloses a preparation method of a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy, comprising: plasma nitriding the iron-based amorphous soft magnetic alloy to obtain a nitrogen-containing iron-based amorphous soft magnetic alloy with a completely amorphous structure After the alloying, the annealing treatment is carried out to obtain the nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy. The temperature of plasma nitriding is 100-400°C, and the nitriding time is 10-60 minutes. The preparation method of the present invention has the characteristics of low nitriding temperature and short nitriding time, overcomes the problem of iron-based amorphous crystallization in the nitriding process, and solves the problems of poor toughness and difficult processing of iron-based amorphous soft magnetic alloy after nitriding question. The invention also discloses the nitrogen-containing iron-based amorphous soft magnetic alloy and the nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy prepared by the above preparation method. The grain size of the nanocrystal is 10-15nm, and the saturation magnetic induction is 1.48- 1.74T.

Description

technical field [0001] The invention relates to the field of magnetoelectric functional materials, in particular to a nitrogen-containing iron-based amorphous nanocrystalline soft magnetic alloy and a preparation method thereof. Background technique [0002] Amorphous nanocrystalline soft magnetic materials have many excellent properties, such as high saturation magnetic induction, low coercive force, high magnetic permeability and low high frequency loss. Among them, the iron-based amorphous nanocrystalline soft magnetic alloy is obtained by annealing above the crystallization temperature of the iron-based amorphous substrate, in which nanometer-sized body-centered cubic iron (bcc-Fe) grains are scattered on the substrate. [0003] The use of amorphous and nanocrystalline soft magnetic alloy materials as magnetic devices can effectively promote their "miniaturization", "lightweight" and "high efficiency". Compared with traditional soft magnetic materials, they have obvious ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C8/38C22C45/02C21D1/26C21D1/30H01F1/153C22C38/02C22C38/16C22C38/10C22C38/12C22C38/14C22C38/06
CPCC21D1/26C21D1/30C22C38/002C22C38/02C22C38/06C22C38/10C22C38/12C22C38/14C22C38/16C22C38/32C22C45/02C23C8/38H01F1/15308H01F1/15333
Inventor 黎嘉威王文泉董亚强贺爱娜
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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