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Iron-based nanocrystalline magnetically soft alloy and preparation method thereof

A technology of iron-based nanocrystals and soft magnetic alloys, applied in magnetic materials, manufacturing tools, magnetic objects, etc., can solve the problems of difficult to achieve comprehensive soft magnetic properties, short holding time for crystallization treatment, low saturation magnetic induction intensity, etc. Achieve the effect of promoting industrial production, simplifying heat treatment process, and high comprehensive soft magnetic properties

Active Publication Date: 2016-03-30
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the FINEMET alloy system still has obvious disadvantages: the saturation magnetic induction is not high
[0015] The above-mentioned patents have improved the soft magnetic properties of nanocrystalline alloy materials to varying degrees by adjusting the alloy composition and optimizing the heat treatment process. The time is too short, which greatly limits its industrial application; (2) In terms of soft magnetic properties, it is difficult to achieve excellent and stable comprehensive soft magnetic properties, that is, to achieve high saturation magnetic induction and low coercivity at the same time force
[0016] To sum up, there is a lack of nanocrystalline soft magnetic alloy materials and their products with simple heat treatment process and excellent and stable soft magnetic properties in the market.

Method used

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  • Iron-based nanocrystalline magnetically soft alloy and preparation method thereof
  • Iron-based nanocrystalline magnetically soft alloy and preparation method thereof
  • Iron-based nanocrystalline magnetically soft alloy and preparation method thereof

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Embodiment 1

[0038] In this embodiment, the compositional chemical formula of the iron-based nanocrystalline soft magnetic alloy is Fe 82 Si 4 B 10 P 2 Cu 1 V 1 .

[0039] The preparation method of the above-mentioned iron-based nanocrystalline soft magnetic alloy is as follows:

[0040] (1) Prepare commercially available Fe 3 P intermediate alloy ingot;

[0041] (2) The pure raw materials of Fe, Si, B, Cu, V with a purity of 99.99% and the intermediate alloy ingot Fe 3 P (99.9%), according to the atomic percentage of the alloy composition;

[0042] (3) Place the raw materials weighed in step (2) in a high-frequency induction melting furnace for melting, first vacuumize to 5×10 -2 Below Pa, then fill in an appropriate amount of protective gas argon. After the alloy is melted, keep it warm for 30 minutes to melt the alloy raw material evenly, then pour it into the casting copper mold, and cool to obtain the alloy ingot;

[0043] (4) Break the alloy ingot, put the broken alloy ingo...

Embodiment 2

[0051] In this embodiment, the compositional chemical formula of the iron-based nanocrystalline soft magnetic alloy is Fe 82 Si 4 B 10 P 2 Cu 1 Ta 1 .

[0052] The preparation method of the above-mentioned iron-based nanocrystalline soft magnetic alloy is as follows:

[0053] (1) Prepare commercially available Fe 3 P intermediate alloy ingot; the high-purity Fe and Ta raw materials are made into Fe according to the alloy composition (atomic percentage) 23 Ta 2 The proportion of ingredients, the prepared Fe 23 Ta 2 The alloy raw materials are put into the water-cooled copper crucible of the electric arc melting furnace, and the vacuum is firstly evacuated to 5×10 -2 Below Pa, then fill in an appropriate amount of protective gas argon for smelting, smelt evenly and then cool down with the furnace, repeat arc smelting 4 times under the same conditions to obtain Fe with uniform composition 23 Ta 2 master alloy ingot;

[0054] (2) Fe, Si, B, Cu pure raw materials with ...

Embodiment 3

[0060] In this embodiment, the compositional chemical formula of the iron-based nanocrystalline soft magnetic alloy is Fe 82 Si 4 B 10 P 2 Cu 1 W 1 .

[0061] The preparation method of the above-mentioned iron-based nanocrystalline soft magnetic alloy is as follows:

[0062] (1) Prepare commercially available Fe 3 P intermediate alloy ingot; the high-purity Fe and W raw materials are converted to Fe according to the alloy composition (atomic percentage) 9 The ratio of W is used for batching, and the prepared Fe 9 Put the W alloy raw material into the water-cooled copper crucible of the electric arc melting furnace, and firstly evacuate to 5×10 -2 Below Pa, then fill in an appropriate amount of protective gas argon for smelting, smelt evenly and then cool down with the furnace, repeat arc smelting 4 times under the same conditions to obtain Fe with uniform composition 9 W master alloy ingot;

[0063] (2) Fe, Si, B, Cu pure raw materials with a purity of 99.99% and the...

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Abstract

The invention provides an iron-based nanocrystalline magnetically soft alloy. The chemical formula of the components of the iron-based nanocrystalline magnetically soft alloy is FeaSibBcPdCueMf, wherein M is selected from at least one kind of transition metal elements V, Ta and W; the subscripts a, b, c, d, e and f represent atom percentage contents of each corresponding element; a is greater than 80 and less than 84; b is greater than 2 and less than 6; c is greater than 8 and less than 12; d is greater than 1 and less than 4; e is greater than 0 and less than 2; f is greater than 0 and less than 4; and a+b+c+d+e+f is equal to 100. Experiments prove that the alloy material has the advantages of high amorphous forming ability, excellent comprehensive soft magnetic property, and high thermal stability; when the alloy material is prepared from amorphous strips by thermal processing, when the thermal processing temperature reaches 100 DEG C, and when the thermal insulation time is extended to be 90 mins, the high comprehensive soft magnetic property of the alloy still can be kept; and therefore, the process conditions of the thermal processing are greatly lowered, the thermal processing process is simplified, and the industrial production is greatly promoted.

Description

technical field [0001] The invention relates to soft magnetic materials in the field of functional materials, in particular to an iron-based nanocrystalline soft magnetic alloy and a preparation method thereof. The alloy material has strong amorphous forming ability and high thermal stability, and can also be passed through The simple and easy heat treatment process obtains excellent and stable soft magnetic properties. Background technique [0002] Since its inception, iron-based nanocrystalline soft magnetic alloy materials have received great attention and in-depth research due to their characteristics of high saturation magnetic induction, high magnetic permeability, low loss, and low coercive force, and have been widely used in switching power supplies. and electromagnetic sensors. [0003] Since Hitachi Metals Yoshizawa et al. discovered Fe-Si-B-Nb-Cu alloys in 1988, the in-depth exploration of iron-based nanocrystalline alloy materials has pushed the research and dev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/147C21D9/52
Inventor 常春涛向震王安定门贺王新敏潘登
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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