High magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy and preparation method thereof

A technology of iron-based amorphous alloys and nanocrystalline alloys, applied in magnetic materials, magnetic objects, electrical components, etc., can solve problems such as uneven distribution of nitrogen elements and difficulty in doping iron-based amorphous alloys with nitrogen

Active Publication Date: 2019-03-08
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] Aiming at the deficiencies in this field, the present invention provides a method for preparing a high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy, which is prepared by using nitrogen-containing raw materials, which not only greatly improves the performance of the iron-based amorphous nanocrystalline alloy. The saturation magnetic induction intensity is high, and the follow-up nitriding step is omitted, which overcomes the difficulty of nitrogen doping in iron-based amorphous alloys and the uneven distribution of nitrogen elements in the past. It is simple and efficient, low in cost, controllable in product quality and suitable for large-scale production. and other advantages, which have guiding significance for improving the saturation magnetic induction of materials

Method used

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  • High magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy and preparation method thereof
  • High magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy and preparation method thereof
  • High magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy and preparation method thereof

Examples

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Effect test

Embodiment 1

[0074] Preparation of nitrogen-coupled iron-based amorphous alloy strips, the chemical formula is (Fe 90 Zr 7 B 3 ) 99.75 N 0.25 .

[0075] (1) Elemental Fe, Zr, B, and ZrN are uniformly mixed according to the above stoichiometric ratio, and a nitrogen-coupled iron-based alloy ingot with uniform composition is prepared by using an electric arc melting furnace. First evacuate until the air pressure is lower than 2.0×10 -2 Pa, and then filled with argon until the pressure is 0.05MPa for multiple smelting, after smelting, the molten alloy ingot is cooled for 30 minutes to obtain a nitrogen-coupled iron-based alloy ingot with uniform composition.

[0076] (2) The obtained nitrogen-coupled iron-based alloy ingot is ground with a grinding wheel to remove surface impurities, crushed and remelted, and packed into a quartz tube with a nozzle at the bottom. The width of the nozzle is 0.8mm, and the gas pressure in the furnace chamber is adjusted to be low. At the standard atmosphe...

Embodiment 2

[0081] The nitrogen-coupled iron-based amorphous alloy strip prepared in Example 1 is subjected to high vacuum heat treatment to obtain a high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy strip, and the chemical molecular formula is (Fe 90 Zr 7 B 3 ) 99.75 N 0.25 .

[0082] The obtained completely amorphous nitrogen-coupled iron-based amorphous alloy strips were placed in a quartz tube and evacuated to 5.0×10 -3 Pa, place the quartz tube in a heat treatment furnace, raise the temperature to 510 °C at a rate of about 2 °C / s, keep it warm for 15 minutes, then heat it up to 630 °C, keep it for 1 hour, then quickly take out the quartz tube and place it in water to quench to room temperature. Then high-vacuum tempering was carried out at 200°C for 90 minutes to obtain a high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy ribbon.

[0083] The nitrogen content of the obtained high magnetic induction nitrogen-coupl...

Embodiment 3

[0086] Preparation of high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy strips, the chemical formula is Fe 76.5 Si 12.7 B 8 Cu 1 (Nb 0.75 Mo 0.75 )N 0.3 .

[0087] (1) Put elemental Fe, Si, B, Cu, Nb, Mo, and NbN into the alumina crucible in the induction melting furnace after mixing uniformly according to the above stoichiometric ratio, and evacuate until the air pressure is lower than 2.0×10 -2 Pa, and then filled with argon to a pressure of 0.05MPa for smelting, heat preservation for 25 minutes after melting, and then pour the molten alloy ingot into a copper mold to cool for 30 minutes to obtain a nitrogen-coupled iron-based alloy ingot with uniform composition.

[0088] (2) The obtained nitrogen-coupled iron-based alloy ingot is ground with a grinding wheel to remove surface impurities, crushed and remelted, and then packed into a quartz tube with a nozzle at the bottom. The width of the nozzle is 0.8mm, and the furnace chamber pres...

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Abstract

The invention discloses a high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy and a preparation method thereof. The method comprises the steps that (1) nitrogen-containing raw materials are smelted into a nitrogen-coupled iron-based alloy ingot casting; (2) the obtained nitrogen-coupled iron-based alloy ingot casting is crushed and refused, and then a completely amorphous nitrogen-coupled iron-based amorphous alloy is obtained through a rapid quenching preparation technology; and (3) the obtained completely amorphous nitrogen-coupled iron-based amorphous alloy is sequentially subjected to two-stage annealing and tempering to obtain the high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy, wherein the temperature of the first-stage annealing of the two-stage annealing is lower than the first crystallization starting temperature by 20-50 DEG C, and the temperature of the second-stage annealing is between the first crystallization starting temperature and the second crystallization starting temperature. The method improves the saturation flux density of the iron-based amorphous nanocrystalline alloy and also improves the service performance of the iron-based amorphous nanocrystalline magnetically soft alloy in a complex and hostile environment.

Description

technical field [0001] The invention relates to the field of magnetoelectric functional materials, in particular to a high magnetic induction nitrogen-coupled iron-based amorphous nanocrystalline alloy and a preparation method thereof. Background technique [0002] With the development of the electronic power industry, it is urgent to develop an alloy material with high saturation magnetic induction. Iron-based amorphous nanocrystalline alloys have the advantages of low coercivity, high effective magnetic permeability, low iron loss, low cost, and simple production process, and have received extensive attention in recent years. [0003] Notification number is that the patent specification of CN 101796207 B discloses a kind of amorphous alloy strip with excellent machinability, the Fe that embodiment 1 provides 余量 Cu 0.98 Nb 3.1 Si 13.4 B 9.3 The saturation magnetic induction of the amorphous alloy ribbon is 1.24T. [0004] The patent specification with the publication ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02C21D1/26H01F1/047
Inventor 黎嘉威王文泉董亚强贺爱娜李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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