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Preparation method for non-oriented high-silicon electrical steel ribbon

A technology of high silicon electrical steel and high silicon steel, applied in the fields of metallurgical technology and material science, can solve the problems of low yield, complex preparation process, environmental pollution, etc., and achieve the effect of solving poor processing performance and improving processing performance.

Inactive Publication Date: 2015-06-17
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method has complex preparation process, low yield and serious environmental pollution.

Method used

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  • Preparation method for non-oriented high-silicon electrical steel ribbon
  • Preparation method for non-oriented high-silicon electrical steel ribbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The chemical composition of a non-oriented high-silicon electrical steel strip is as follows by weight percentage: Si: 4.5%, Al: 0.6%, Mn: 0.3%, N: 0.0033%, S: 0.0038%, P: 0.0066%, Cr: 2.1%, C: 0.004%, O: 0.002%, the balance is Fe and inevitable impurities, the thickness of the thin strip is 0.35mm.

[0027] The preparation method of a non-oriented high silicon electrical steel strip with the above composition is carried out according to the following steps:

[0028] (1) Smelting: The chemical composition obtained by smelting in a vacuum smelting furnace is as follows: Si: 4.5%, Al: 0.6%, Mn: 0.3%, N: 0.0033%, S: 0.0038%, P: 0.0066%, Cr: 2.1%, C: 0.004%, O: 0.002%, liquid high silicon steel with the balance Fe and inevitable impurities;

[0029] (2) Casting and rolling: liquid high silicon steel is cast into twin-roll casting equipment at 1460°C, and the casting speed is 35m / min to form a non-oriented high silicon steel cast strip. After exiting the cast roll, it is air-coole...

Embodiment 2

[0038] The chemical composition of a non-oriented high-silicon electrical steel strip is as follows by weight percentage: Si: 6.5%, Al: 0.2%, Mn: 0.6%, N: 0.0033%, S: 0.0028%, P: 0.0067%, Cr: 3%, C: 0.006%, O: 0.002%, the balance is Fe and inevitable impurities, the thickness of the thin strip is 0.35mm.

[0039] The preparation method of a non-oriented high silicon electrical steel strip with the above composition is carried out according to the following steps:

[0040] (1) Smelting: The chemical composition obtained by vacuum smelting furnace is as follows: Si: 6.5%, Al: 0.2%, Mn: 0.6%, N: 0.0033%, S: 0.0028%, P: 0.0067%, Cr: 3%, C: 0.006%, O: 0.002%, liquid high silicon steel with the balance Fe and unavoidable impurities;

[0041] (2) Casting and rolling: liquid high silicon steel is cast into twin-roll casting equipment at 1440°C, and the casting speed is 30m / min to form a non-oriented high silicon steel cast strip. After the cast roll is discharged, it is air-cooled to ro...

Embodiment 3

[0048] The chemical composition of a non-oriented high silicon electrical steel strip is Si: 7.0%, Cr: 5.0%, Al: 0.06%, Mn: 0.8%, N: 0.005%, S: 0.002%, P: 0.18 in weight percentage %, O: 0.001, C: 0.005%, the balance is Fe and inevitable impurities, the thickness of the thin strip is 0.35mm.

[0049] The preparation method of a non-oriented high silicon electrical steel strip of the present invention is carried out according to the following steps:

[0050] (1) Smelting: Using vacuum smelting furnace to smelt high silicon steel, the chemical composition obtained by weight percentage is Si: 7.0%, Cr: 5.0%, Al: 0.06%, Mn: 0.8%, N: 0.005%, S: Liquid high silicon steel with 0.002%, P: 0.18%, O: 0.001, C: 0.005%, the balance is Fe and unavoidable impurities;

[0051] (2) Casting and rolling: Cast the above-mentioned liquid high silicon steel into a twin-roll casting and rolling equipment at 1420°C at a casting speed of 10 m / min to form a non-oriented high silicon steel cast strip, which ...

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Abstract

The invention relates to a non-oriented high-silicon electrical steel ribbon and its making method, and belongs to the fields of the metallurgical technology and the material science. The chemical components of the ribbon comprise 4.5-7.0wt% of Si, 2.0-5.0wt% of Cr, 0.06-1.0wt% of Al, 0.3-0.8wt% of Mn, 0.005wt% or less of N, 0.004wt% or less of S, 0.02wt% or less of P, 0.003wt% or less of O, 0.005wt% or less of C, and the balance Fe, and the thickness of the ribbon is 0.35-0.5mm. The making method comprises the following steps: smelting non-oriented high-silicon steel in a vacuum smelting furnace; carrying out double-roller ribbon roll-casting at a casting temperature of 1420-1460DEG C to the ribbon thickness of 1.0-1.5mm; carrying out hot rolling of the ribbon at 800-1100DEG C to the hot rolled ribbon thickness of 0.8-1.0mm; pickling, and preheating the ribbon, and carrying out warm rolling at 400-700DEG C; and annealing. The addition of the Cr element in the high-silicon electrical steel ribbon obviously improves the processing performance of the high-silicon steel ribbon, the iron loss value is same to the iron losses of present high-silicon steel products, and the magnetic induction intensity is above 0.03T higher than that of the present products. The making method has the advantages of simple technology, low energy consumption, high yield, and excellent product magnetic property.

Description

technical field [0001] The invention belongs to the field of metallurgical technology and material science, and in particular relates to a preparation method of a non-oriented high-silicon electrical steel strip. Background technique [0002] High-silicon electrical steel sheets, especially silicon steel sheets with a silicon content of 6.5wt%, have excellent soft magnetic properties, such as low iron loss at medium and high frequencies, close to zero magnetostriction, high magnetic permeability, and low coercive force. It is an ideal core material for making low noise, low iron loss transformers and reactors. However, this material has poor toughness and is difficult to prepare. Until the end of the 1970s, Fe-6.5%Si alloy was mainly prepared by rolling method, but it has not been able to be produced because the cold rolling brittleness has not been fundamentally solved. [0003] In 1978, Tsuya and Arail successfully prepared soft Fe-6.5%Si alloy thin strips by rapid solid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/34C21D8/12
Inventor 刘振宇曹光明李成刚刘海涛李昊泽王国栋
Owner NORTHEASTERN UNIV LIAONING
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