High-silicon steel and preparation method thereof

A high-silicon steel and billet technology, which is applied in the field of high-silicon soft magnetic material preparation, can solve the problems of restricting industrial production and large-scale application, difficult processing and molding, and deterioration of magnetic properties, so as to avoid strain hardening, improve elongation, The effect of improving processing performance

Active Publication Date: 2021-06-04
BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the Si content increases, the elongation of silicon steel deteriorates sharply, but due to its poor mechanical properties, it is difficult to process and form, which greatly limits its industrial production and large-scale application.
At present, in order to solve the above problems, the mechanical properties of silicon steel are improved by adding single elements such as B, Cu, Al, Ce, etc., but this method causes a significant deterioration of the magnetic properties while increasing the elongation.

Method used

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  • High-silicon steel and preparation method thereof
  • High-silicon steel and preparation method thereof
  • High-silicon steel and preparation method thereof

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Embodiment approach

[0042] As an implementation manner of the examples of the present invention, the metallographic structure of the high silicon steel is α-BCC (ferrite)

[0043] On the other hand, the embodiment of the present invention also provides a method for preparing the above-mentioned high silicon steel, the method comprising:

[0044]S1, obtaining a steel slab; the steel slab is composed of the following chemical components in mass fractions: Si: 5.0-7.0%, Ni: 0.001-0.05%, Ce: 0.0001-0.0002%, and the rest is Fe and unavoidable impurities;

[0045] S2, heating the billet to a temperature of 1180-1200° C., holding the temperature for 3-4 hours, and then forging to obtain an intermediate billet;

[0046] S3, rolling the intermediate billet once at a temperature of 950-1100° C. to obtain a thick steel strip;

[0047] S4, heating the thick steel strip to a temperature of 160-400° C., keeping it warm for 8-12 minutes, and then performing secondary rolling to obtain a thin steel strip;

[0...

Embodiment 1

[0063] This embodiment 1 provides a magnetically compatible Fe-6.5Si-0.001Ni-0.002Ce high silicon steel and its preparation method, the preparation method comprising the following steps:

[0064] In the first step, Fe-6.5Si-0.001Ni-0.002Ce is smelted by vacuum induction melting method, and the unit is w.t.%, that is, the mass percentage content. And at 1200 ℃ for 4h homogenization heat treatment.

[0065] In the second step, the alloy ingot is forged into a square alloy block with a thickness of 20mm at 1200°C in an atmospheric environment.

[0066] The third step is to carry out multi-pass rolling on the alloy block at 1100° C. to obtain an alloy sheet with a thickness of 2 mm.

[0067] The fourth step is to perform surface grinding on the rolled alloy plate to remove scale.

[0068] The fifth step is to carry out multi-pass rolling on the alloy ingot at 300° C., the reduction rate in the first pass is 12%, and the average reduction rate is 6%. The diameter of the roll is 8...

Embodiment 2

[0071] This embodiment 2 provides a magnetically compatible Fe-6.5Si-0.1Ni-0.0005Ce high-silicon steel and a preparation method thereof, the preparation method comprising the following steps:

[0072] In the first step, Fe-6.5Si-0.1Ni-0.0005Ce is smelted by vacuum induction melting method, and the unit is w.t.%, that is, the mass percentage content. And at 1200 ℃ for 4h homogenization heat treatment.

[0073] In the second step, the alloy ingot is forged into a square alloy block with a thickness of 20mm at 1200°C in an atmospheric environment.

[0074] The third step is to carry out multi-pass rolling on the alloy block at 1000° C. to obtain an alloy sheet with a thickness of 2 mm.

[0075] The fourth step is to perform surface grinding on the rolled alloy plate to remove scale.

[0076] The fifth step is to carry out multi-pass rolling on the alloy ingot at 300° C., the reduction rate of the first pass is 10%, and the average reduction rate is 8%. The diameter of the roll ...

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Abstract

The invention provides high-silicon steel and a preparation method thereof. The high-silicon steel consists of the following chemical components in percentage by mass: 5.0 to 7.0 percent of Si, 0.001 to 0.05 percent of Ni, 0.0001 to 0.0002 percent of Ce and the balance of Fe and inevitable impurities. According to the high-silicon steel provided by the invention, the ductility is 15 to 22 percent, the tensile strength is 739 to 824 MPa, the magnetic induction intensity B8 is 1.26 to 1.29 T, the iron loss P2/10k is 68 to 80 W/kg, the coercive force is 10.6 to 13.4/m, the maximum magnetic conductivity is 19000 to 25000, and the high-silicon steel has good magnetic performance and extensibility, is easy to process and can be produced and applied in a large scale.

Description

technical field [0001] The invention belongs to the technical field of preparation of high-silicon soft magnetic materials, and in particular relates to a high-silicon steel and a preparation method thereof. Background technique [0002] Silicon steel, also known as Fe-Si alloy, is an important magnetic material used in the electric and electronic industries to manufacture generators, motors, transformers, transformers, relays and other electrical instruments. Silicon steel has the largest output and consumption in the field of magnetic materials, and is a very important class of metal functional materials. From the generator that generates electric energy, the transformer that transmits electric energy to the motor that utilizes electric energy, etc., the iron core material is silicon steel sheet made of silicon steel, which plays an extremely important role in storing and converting energy. [0003] For Fe-Si alloy, with the increase of Si content, the hardness increases,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/08C22C38/02C21D8/02
CPCC22C38/08C22C38/02C22C38/005C21D8/0226C21D2211/005
Inventor 于海原徐明舟李振瑞
Owner BEIJING BEIYE FUNCTIONAL MATERIALS CORP
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