Non-oriented high-silicon electrical steel ribbon and its making method

A technology of high-silicon electrical steel and high-silicon steel, which is applied in the fields of metallurgical technology and material science, can solve problems such as low yield, complicated preparation process, and environmental pollution, and achieve the effect of solving poor processing performance and improving processing performance

Inactive Publication Date: 2013-04-24
NORTHEASTERN UNIV
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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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  • Non-oriented high-silicon electrical steel ribbon and its making method
  • Non-oriented high-silicon electrical steel ribbon and its making method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The chemical composition of a non-oriented high-silicon electrical steel thin strip is: 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 unavoidable impurities, and the thickness of the strip is 0.35mm.

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

[0028] (1) Smelting: The chemical composition obtained by smelting in a vacuum smelting furnace is: 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 liquid high silicon steel of Fe and unavoidable impurities;

[0029] (2) Casting and rolling: Liquid high silicon steel is cast into twin-roll casting and rolling equipment at 1460°C, the casting and rolling speed is 35m / min, forming a non-oriented high silicon steel cast strip, which is air-cooled to room temperature a...

Embodiment 2

[0039] The chemical composition of a non-oriented high-silicon electrical steel thin strip is: 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 unavoidable impurities, and the thickness of the strip is 0.35mm.

[0040] The preparation method of a kind of non-oriented high-silicon electrical steel thin strip of above-mentioned composition is carried out according to the following steps:

[0041] (1) Smelting: The chemical composition obtained by smelting in a vacuum smelting furnace is: 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 Fe and unavoidable impurities as the balance;

[0042] (2) Casting and rolling: Liquid high silicon steel is cast into twin-roll casting and rolling equipment at 1440°C, with a casting and rolling speed of 30m / min, to form a non-oriented high silicon steel cast strip, which is air-cooled to room tempe...

Embodiment 3

[0050] The chemical composition of a non-oriented high-silicon electrical steel thin strip is Si: 7.0%, Cr: 5.0%, Al: 0.06%, Mn: 0.8%, N: 0.005%, S: 0.002%, P: 0.18 %, O: 0.001, C: 0.005%, the balance is Fe and unavoidable impurities, and the thickness of the strip is 0.35mm.

[0051] The preparation method of a kind of non-oriented high-silicon electrical steel strip of the present invention is carried out according to the following steps:

[0052] (1) Smelting: Vacuum smelting furnace is used to smelt high-silicon steel, and the chemical components obtained are Si: 7.0%, Cr: 5.0%, Al: 0.06%, Mn: 0.8%, N: 0.005%, S: 0.002%, P: 0.18%, O: 0.001, C: 0.005%, the balance is liquid high silicon steel of Fe and unavoidable impurities;

[0053] (2) Casting and rolling: Cast the above-mentioned liquid high-silicon steel into a twin-roll casting and rolling equipment at 1420°C, with a casting-rolling speed of 10 m / min, to form a non-oriented high-silicon steel cast strip, and air-cool...

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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 specifically relates to a non-oriented high-silicon electrical steel strip and a preparation method thereof. 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 rap...

Claims

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Application Information

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Patent Type & Authority Applications(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
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