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Preparing method of high silicon electrical steel strip with gradient-distributed silicon content

A high-silicon electrical steel, gradient distribution technology, applied in the field of metallurgy, can solve problems such as low production efficiency and serious environmental pollution, and achieve the effects of high production efficiency, low environmental pollution, and reduction of high-frequency iron loss

Active Publication Date: 2014-04-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the CVD method has serious environmental pollution and low production efficiency.

Method used

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  • Preparing method of high silicon electrical steel strip with gradient-distributed silicon content
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preparation example Construction

[0029] The preparation method of the hot-rolled high-silicon steel plate in the embodiment of the present invention is as follows: the slab is made by melting and casting, and then hot-rolled. The starting temperature of the hot rolling is 1000-1200°C, and the finishing temperature is 700-1000°C. , The reduction rate is 50~99%.

[0030]The preparation method of the warm-cold-rolled high-silicon steel plate in the embodiment of the present invention is as follows: first, the slab is made by melting and casting, and then hot-rolled to make a hot-rolled high-silicon steel plate. The final rolling temperature is 700~1000°C, and the reduction rate is 50~99%; then the hot-rolled high silicon steel plate is subjected to warm and cold rolling, the temperature of warm and cold rolling is room temperature~690°C, and the reduction rate is 10~95%, Made into warm and cold rolled high silicon steel plate.

[0031] The ordinary silicon steel plate in the embodiment of the present invention ...

Embodiment 1

[0039] Prepare a high-silicon steel plate, its composition contains Si 7.0%, S 0.05%, P 0.05%, C 0.05% by weight percentage, and the balance is Fe and unavoidable impurities; the high-silicon steel plate is a hot-rolled high-silicon steel plate;

[0040] Prepare common silicon steel plate, its composition contains Si 3.5%, Al 1.0%, P 0.05%, S 0.05%, C 0.05% by weight percentage, the balance is Fe and unavoidable impurity; Common silicon steel plate is hot-rolled common silicon steel plate;

[0041] Select two high-silicon steel plates and one ordinary silicon steel plate with the same length and width; the thicknesses of the two high-silicon steel plates are 1mm and 3mm respectively, and the thickness of the ordinary silicon steel plate is 16mm; Each high-silicon steel plate removes the oxide layer on one surface; then the ordinary silicon steel plate is placed between two high-silicon steel plates, so that the surfaces of the high-silicon steel plate and the common silicon ste...

Embodiment 2

[0046] Prepare high-silicon steel plate, its composition contains Si 6.55%, Al 0.006%, Mn 0.01%, S 0.006%, P 0.008%, C 0.005% by weight percentage, the balance is Fe and unavoidable impurities; high-silicon steel plate is hot-rolled High silicon steel plate;

[0047] Prepare ordinary silicon steel plate, its composition contains Mn 0.002%, P 0.002%, S 0.003%, C 0.006% by weight percentage, the balance is Fe and unavoidable impurities; ordinary silicon steel plate is the slab made by melting and casting;

[0048] Select two high-silicon steel plates and one ordinary silicon steel plate with the same length and width; the thickness of the two high-silicon steel plates is 20mm, and the thickness of the ordinary silicon steel plate is 300mm; Remove the oxide layer on one surface of each plate; then place the ordinary silicon steel plate between two high silicon steel plates, so that the surfaces of the high silicon steel plate and the ordinary silicon steel plate with the oxide la...

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Abstract

The invention provides a preparing method of a high silicon electrical steel strip with gradient-distributed silicon content, and belongs to the technical field of metallurgy. The preparing method includes preparing high silicon steel plates and ordinary steel plates; selecting two high silicon steel plates and one ordinary steel plate which are same in size; removing oxide layers respectively; then placing the ordinary steel plate between the two high silicon steel plates, and obtaining a combined blank; placing the combined blank at an inert atmosphere, a reducing atmosphere, an inert-reducing mixed atmosphere or in a vacuum condition, heating and preserving heat; then performing multi pass hot rolling, and obtaining a composite silicon steel plate; pickling the composite silicon steel plate, cold rolling, and annealing finally. Compared with a traditional chemical vapor deposition method, the preparing method of the high silicon electrical steel strip with gradient-distributed silicon content is low in environment pollution, high in producing efficiency, and has good application prospect.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a preparation method of a high-silicon electrical steel strip with a gradient distribution of silicon content. Background technique [0002] Electrical steel is the most widely used soft magnetic material in power electronic equipment, mainly used in the iron core of transformers and motors. With the increase of silicon content in electrical steel, the resistivity and permeability increase, and the coercive force and magnetocrystalline anisotropy decrease. The electrical steel with a silicon content of 6.5wt.% Si has the best comprehensive soft magnetic properties. Compared with 3.0wt.% Si silicon steel, the magnetocrystalline anisotropy coefficient K1 is reduced by 30%, and the magnetostriction coefficient λs is reduced by 90%. The process can significantly reduce energy consumption and reduce noise. With the increase of operating frequency, the advantages of so...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B9/00B21B15/00C22C38/60C22C38/06C22C38/34
Inventor 左良沙玉辉柳金龙张芳柯云海
Owner NORTHEASTERN UNIV
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