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Iron-based amorphous alloy strip and preparation method thereof

An iron-based amorphous alloy and strip technology, which is applied in the direction of magnetic materials, manufacturing tools, heat treatment equipment, etc., can solve the problems of increased iron content, reduced spraying time, and reduced yield, so as to achieve a dense and smooth surface, High saturation magnetic induction intensity, the effect of reducing soft magnetic properties

Active Publication Date: 2019-03-22
QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most representative is the Metglas2605Co alloy developed by Allied-Signal Company of the United States. The saturation magnetic induction of this alloy reaches 1.8T, but the alloy contains 18% Co element, which makes the cost too high to be used in industrial production. application
At present, the amorphous strip with high saturation magnetic induction applied on the market is an alloy developed by Hitachi Metals Co., Ltd. with the brand name "2605HB1M". From its published patent information (publication number CN1721563A), this alloy is actually The Fe-Si-B-C alloy has a saturation magnetic induction of 1.64T; however, the process of controlling the distribution of C element content on the surface of the strip by blowing C-containing gas during the preparation process will directly make it difficult to control the production process conditions of its products. The stability of industrial production cannot be guaranteed
[0005] In addition, the rest of the research on amorphous strips with high saturation magnetic induction is basically from the perspective of research institutes. For example, Shin Nippon Steel Corporation announced a Fe-Si-B-P-C alloy in patent CN1356403A. The saturation magnetic induction Reaching 1.75T is difficult to achieve in actual industrial production
[0006] Compared with the conventional magnetic induction amorphous strip, the iron content of the high saturation magnetic induction amorphous strip is generally 2 to 3 atoms higher, but the increase of the iron content reduces the relative amorphous forming elements. Under the same preparation conditions In this situation, the preparation of amorphous strips with high saturation magnetic induction is more difficult, the continuous spraying time is reduced, the yield is reduced, and the quality of the strips is seriously deteriorated.

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  • Iron-based amorphous alloy strip and preparation method thereof

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preparation example Construction

[0046] The present application also provides a method for preparing the above-mentioned iron-based amorphous alloy strip, comprising the following steps:

[0047] A) smelting and refining after batching according to the composition of the iron-based amorphous alloy shown in formula (I), to obtain molten steel;

[0048] B) performing single-roll rapid quenching on the molten steel, and then performing heat treatment to obtain an iron-based amorphous alloy strip;

[0049] In the process of single-roll rapid quenching, the roughness of the cooling roll surface is 0.1-0.5 μm;

[0050] Fe a Si b B c C d m f (I);

[0051] Wherein, M is a trace element;

[0052] a, b, c, d and f correspond to the atomic percentage of each element, 81.0≤a≤83.0, 0.5≤b≤6.5, 12.0≤c≤14.5, 0.1≤d≤1.3, f≤0.4, a+b +c+d+f=100.

[0053] In the process of preparing iron-based amorphous alloy strips, the applicant first smelts and refines the ingredients according to the ingredients of the iron-based am...

Embodiment 1

[0063] The present invention respectively according to Fe 81.75 Si 3.85 B 13.1 C 1.3 and Fe 82.65 Si 3.45 B 13.78 C 0.12 The alloy composition is smelted, and the iron-based amorphous strip with a width of 170mm and a thickness of 28μm is prepared; in the production process, the cooling roll needs to be pre-grinded after turning-coarse grinding and then fine grinding, and the roll surface after pre-grinding The surface flatness gradually increases and the roughness gradually decreases. During the belt spraying process, the online grinding stage is carried out. In this stage, only fine grinding is carried out, so that the roller surface has a surface roughness of 0.1-0.5μm in the entire rotation cycle and width range. degree (the specific surface roughness is shown in Table 1); when grinding, the grinding wheel swings perpendicular to the feeding direction. Table 1 lists the relationship data table between the number of pinholes on the surface and the strip lamination co...

Embodiment 2

[0069] The present invention presses Fe a Si b B c C d m fRaw materials such as iron source and metal silicon, ferroboron and other raw materials with different proportions are remelted in intermediate frequency smelting furnaces. After the smelting is completed, the steel is tapped to the intermediate frequency bottom furnace. The iron-based amorphous broadband with a width of 240 mm and a thickness of 26 to 30 μm is prepared by using the method used; in the production process, the cooling roll needs to be pre-grinded after turning-coarse grinding and then finely ground, and the surface flatness of the roll surface is gradually reduced after pre-grinding increase, the roughness gradually decreases, and the on-line grinding stage is carried out during the belt spraying process. In this stage, only fine grinding is carried out, so that the roller surface has a surface roughness of 0.1-0.5 μm in the entire rotation cycle and width range; during grinding , the grinding wheel ...

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Abstract

The invention provides an iron-based amorphous alloy strip as shown in a formula (1). The pinhole length of the iron-based amorphous alloy strip is greater than 0 and is smaller than or equal to 4 mm,the pinhole width is greater than 0 and smaller than or equal to 2 mm, and the number of pinholes in a strip with the length being 2 m does not exceed 5. The invention further provides a preparationmethod of the iron-based amorphous alloy strip. The method comprises the following steps that A) after ingredients of a shown iron-based amorphous alloy are prepared, smelting and refining are performed so as to obtain molten steel; and B) the molten steel is subjected to single-roll rapid quenching, then heat treatment is performed, and the iron-based amorphous alloy strip is obtained. Accordingto the iron-based amorphous alloy strip and the preparation method thereof, the surface quality of the iron-based amorphous alloy strip is controlled by optimizing the alloy ingredients and the preparation technology, so that the iron-based amorphous alloy strip with the high saturation flux density, high lamination coefficient, low loss and high tenacity is obtained.

Description

technical field [0001] The invention relates to the technical field of soft magnetic materials, in particular to an iron-based amorphous alloy strip and a preparation method thereof. Background technique [0002] Iron-based amorphous strips have excellent soft magnetic properties and can be used as iron core materials for distribution transformers. Compared with the traditional transformer made of silicon steel sheet, the magnetization process of iron-based amorphous alloy is quite easy on the one hand, thereby greatly reducing the no-load loss of the transformer; Ingot billeting, initial rolling, annealing, hot rolling, annealing, pickling, finish rolling, shearing to thin plate products require several process links and dozens of processes, while the production process of iron-based amorphous strip is simple and the production capacity The consumption is small, so the iron-based amorphous strip is called "double energy-saving material". [0003] In recent years, with the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02B22D11/06C21D9/52C21D1/04H01F1/153
CPCH01F1/15308H01F1/15341C21D1/04C21D9/52C22C45/02B22D11/0611B22D11/0665C22C1/11
Inventor 李晓雨庞靖刘红玉杨东
Owner QINGDAO YUNLU ADVANCED MATERIALS TECH CO LTD
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