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A low-cost high-saturation magnetization iron-based soft magnetic alloy and its preparation method

A magnetization, soft magnetic alloy technology, applied in the direction of magnetic objects, magnetic materials, electrical components, etc., can solve the problems of low saturation magnetization, high saturation magnetization, limited use range, etc., to achieve high saturation magnetization, good saturation Magnetization intensity, effect of reducing production cost

Active Publication Date: 2019-04-09
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

FINEMET alloy is now widely used in industrial production due to its high magnetic permeability, low loss and other characteristics, but its saturation magnetization is low, and the composition Fe with the best comprehensive magnetic properties 73.5 Si 13.5 B 9 Nb 3 Cu 1 The saturation magnetization is only 1.24T, which greatly limits its application range
Although NANOPERM alloy and HITPERM alloy have improved the saturation magnetic induction intensity of the material, they are easily oxidized, have poor processability, and have relatively large coercive force, so it is difficult to obtain a wide range of application and promotion, as disclosed in Chinese patent CN 102304669 A Fe-based nanocrystalline soft magnetic alloy, the highest saturation magnetization alloy Fe 82.7 B 10 C 6 Cu 1.3 Reaching 1.83T, the coercive force is as high as 15.5A / m; the lowest coercive force alloy Fe 83 B 10 C 6 Si 1 Cu 1 The saturation magnetization is 1.78T, and the coercive force is 4.5A / m; high saturation magnetization and low coercive force cannot be guaranteed at the same time
Moreover, the above three nanocrystalline soft magnetic alloy systems all contain a high proportion of noble metal elements such as Nb, Zr, Hf, etc., which makes the production cost high

Method used

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  • A low-cost high-saturation magnetization iron-based soft magnetic alloy and its preparation method
  • A low-cost high-saturation magnetization iron-based soft magnetic alloy and its preparation method
  • A low-cost high-saturation magnetization iron-based soft magnetic alloy and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] Weigh metal raw materials iron, boron iron, copper, carbon iron and niobium according to a certain proportion, and put them into a vacuum melting furnace to prepare alloy ingots. This process needs to be smelted repeatedly (at least 3 times) to make the alloy components smelt evenly; smelting The temperature is 1800~2000℃; the time of each smelting is about 15.

[0066] The alloy ingot was crushed and put into acetone solution, cleaned in ultrasonic waves, and dried in the air for later use.

[0067] Put the crushed alloy ingot into the quartz tube of the quenching strip-making equipment, and use the single-roll quenching strip method at a speed of 50m / s to prepare a thin alloy strip with a width of 2 mm and a thickness of about 25 microns.

[0068] Put the prepared amorphous alloy thin strip into a heat treatment furnace, under the protection of nitrogen gas environment, raise the temperature to 440°C at a heating rate of 20°C / min, keep it warm for 10 minutes, and then...

Embodiment 2

[0074] Weigh metal raw materials iron, boron iron, copper, carbon iron and niobium according to a certain proportion, and put them into a vacuum melting furnace to prepare alloy ingots. This process needs to be smelted repeatedly (at least 3 times) to make the alloy components smelt evenly; smelting The temperature is 1800~2000℃; the time of each melting is about 15s.

[0075] The alloy ingot was crushed and put into acetone solution, cleaned in ultrasonic waves, and dried in the air for later use.

[0076] Put the crushed alloy ingot into the quartz tube of the quenching strip-making equipment, and use the single-roll quenching strip method at a speed of 50m / s to prepare a thin alloy strip with a width of 2 mm and a thickness of about 25 microns.

[0077] Put the prepared amorphous alloy strip into a heat treatment furnace, under the protection of nitrogen gas environment, raise the temperature to 420°C at a heating rate of 20°C / min, keep it warm for 10 minutes, and then cool...

Embodiment 3

[0083] Weigh metal raw materials iron, boron iron, copper, carbon iron and niobium according to a certain proportion, and put them into a vacuum melting furnace to prepare alloy ingots. This process needs to be smelted repeatedly (at least 3 times) to make the alloy components smelt evenly; smelting The temperature is 1800~2000℃; the time of each melting is about 15s.

[0084] The alloy ingot was crushed and put into acetone solution, cleaned in ultrasonic waves, and dried in the air for later use.

[0085] Put the crushed alloy ingot into the quartz tube of the quenching strip-making equipment, and use the single-roll quenching strip method at a speed of 50m / s to prepare a thin alloy strip with a width of 2 mm and a thickness of about 25 microns.

[0086]Put the prepared amorphous alloy strip into a heat treatment furnace, under the protection of nitrogen gas environment, raise the temperature to 420°C at a heating rate of 20°C / min, keep it warm for 10 minutes, and then cool ...

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Abstract

The invention provides a low-cost high-saturation magnetization intensity iron-based soft magnetic alloy. The alloy comprises the ingredients of Fe<a1>B<a2>C<a3>Cu<a4>M<a5>, wherein M is one or several kinds of Nb, Ti, Hf or W; a1 is greater than or equal to 83 and less than or equal to 86; a2 is greater than or equal to 7 and less than or equal to 12; a3 is greater than or equal to 2 and less than or equal to 6; a4 is greater than 0 and less than or equal to 1; a5 is greater than or equal to 0.05 and less than or equal to 1; and a1+a2+a3+a4+a5 is equal to 100. Compared with the prior art, copper content is lowered, boron content is lowered and iron content is improved, so that the soft magnetic alloy has high saturation magnetization intensity, and the coercivity of the soft magnetic alloy is lowered by adding a small quantity of niobium and other alloys; and meanwhile, the carbon element is adopted to replace a silicon element, so that relatively low cost is satisfied while the soft magnetic performance of the alloy is improved. The invention also provides a preparation method for the low-cost high-saturation magnetization intensity iron-based soft magnetic alloy.

Description

technical field [0001] The invention relates to the technical field of soft magnetic alloys, in particular to an iron-based soft magnetic alloy with low cost and high saturation magnetization. Background technique [0002] Since the successful research of amorphous soft magnetic materials in the 1970s, their superior soft magnetic properties have been favored by many researchers. Iron-based amorphous / nanocrystalline soft magnetic alloys have excellent soft magnetic properties, high saturation magnetic induction, low Coercive force, high magnetic permeability, low loss, high and stable Curie temperature and other characteristics have been research hotspots in the field of materials and condensed matter physics for decades. In addition, the iron-based amorphous / nanocrystalline soft magnetic alloy has a simple preparation process and low cost, and is widely used in transformers, inductors, sensors and other fields and has good application prospects. [0003] The research on na...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/147C22C38/32C22C38/16C22C38/12C22C38/14
CPCC22C38/002C22C38/12C22C38/14C22C38/16C22C38/32H01F1/14716
Inventor 王国太杨元政袁涵姚春莲周林徐佳李文
Owner GUANGDONG UNIV OF TECH
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