Short-flow high-efficiency preparation method of thin high-silicon electrical steel strip

A high-silicon electrical steel, short-process technology, applied in metal rolling and other directions, can solve the problems of high equipment and control requirements, high cost, complex preparation process of silicon electrical steel strip, etc. Effects of hydrostatic pressure, improved microstructure, and shape and distribution of precipitates

Active Publication Date: 2010-11-17
UNIV OF SCI & TECH BEIJING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The purpose of the present invention is to provide a short-process and high-efficiency preparation method of high-silicon electrical steel strip, which solves the problems of complex preparation process, high equ

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1: Fe-6.5Si-0.05B ​​high-silicon electrical steel thin strip with a thickness of 0.18 mm was prepared by stainless steel sheathed rolling method.

[0032] (1) The alloy is smelted in a vacuum melting furnace, the composition is: Fe-6.5Si-0.05B, and the rod-shaped billet with a diameter of 7mm is cut on the ingot by wire cutting;

[0033] (2) Directional solidification: The alloy billet is prepared into a columnar crystal bar with a diameter of 7.5mm and a texture of containing more than 80% by using the zone melting directional solidification technology. The preparation process is: melt temperature 1500°C, cooling water temperature 25°C , The distance between the highest temperature zone of the melt and the cooling water is 8mm, and the solidification rate is 2mm / min;

[0034] (3) Quenching treatment process: heat preservation at 900°C for 1 hour under the protection of argon, and then quench, and the quenching medium is quenching oil;

[0035] (4) Oxide skin re...

Embodiment 2

[0040] Example 2: Fe-6.5Si-0.03B high-silicon electrical steel thin strip with a thickness of 0.20 mm was prepared by 45# steel ladle rolling method.

[0041] (1) The alloy is smelted in a vacuum melting furnace, the composition is: Fe-6.5Si-0.03B, and a rod-shaped billet with a diameter of 10mm is cut on the ingot by wire cutting;

[0042] (2) Directional solidification: The alloy billet is prepared into a columnar crystal bar with a diameter of 10.5mm and a texture of containing more than 80% by using the zone melting directional solidification technology. The preparation process is: melt temperature 1500°C, cooling water temperature 25°C , The distance between the highest temperature zone of the melt and the cooling water is 5mm, and the solidification rate is 1.5mm / min;

[0043] (3) Quenching treatment process: heat preservation at 800°C for 2 hours under the protection of argon, then quench, and the quenching medium is quenching oil;

[0044] (4) Oxide skin removal: the...

Embodiment 3

[0049] Example 3: Fe-6.5Si-0.01B high-silicon electrical steel thin strip with a thickness of 0.20 mm was prepared by pure iron sheathed rolling method.

[0050] (1) The alloy is smelted in a vacuum melting furnace, the composition is: Fe-6.5Si-0.01B, and the ingot is cut by wire cutting to 12×6×120mm 3 slab blank;

[0051] (2) Directional solidification: the alloy billet is prepared by zone melting directional solidification technology into a cross-sectional size of 12.5×6.5mrn 2 , Containing more than 80% silk-textured columnar crystal plates, the preparation process is: melt temperature 1550 ° C, cooling water temperature 25 ° C, the distance between the highest temperature zone of the melt and the cooling water is 5 mm, and the solidification rate is 1 mm / min;

[0052] (3) Quenching treatment process: heat preservation at 1000°C for 2 hours under the protection of argon, then quench, and the quenching medium is quenching oil;

[0053] (4) Oxide skin removal: the surface...

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Abstract

The invention discloses a short-flow high-efficiency preparation method of a thin high-silicon electrical steel strip, which belongs to the field of metal material preparation and processing. The short-flow high-efficiency preparation method of the thin high-silicon electrical steel strip is characterized by comprising the following steps of: preparing a column-shaped crystal rod blank or plate blank, which contains more than 80 percent (100) of silk texture, from a Fe-(6.5 wt percent) Si alloy blank and by using zone melting directional solidification technology; keeping the rod blank or the plate blank at the temperature of between 700 and 1,000 DEG C in an argon protective atmosphere for 1 to 5 hours and then performing quenching treatment, and removing the oxide skin on the surface of the quenched rod blank or the quenched plate blank by a mechanical method or manual grinding; wrapping the rod blank or the plate blank by using stainless steel, common carbon steel or pure iron as a wrapping material, heating the whole body after the wrapping and performing middle-temperature rolling; and peeling the wrapped sheath, washing the high-silicon electrical steel with acid and then performing room-temperature rolling to obtain the thin high-silicon electrical strip with a splendid surface. The short-flow high-efficiency preparation method of the thin high-silicon electrical steel string has the advantages that: the yield of the thin strip prepared by the process approaches 100 percent; the prepared thin high-silicon electrical steel strip has a splendid surface and a uniform texture, the minimal bending radius is less than 2.5 millimeters, and the thin high-silicon electrical steel strip can be directly coiled to form an annular core of a transformer or an inductor and also can be prepared into high-silicon electrical steel through subsequent treatment.

Description

Technical field: [0001] The invention relates to a short-flow and high-efficiency preparation method for high-silicon electrical steel strips, which belongs to the technical field of metal material preparation and processing, and in particular provides a high-efficiency preparation and processing technology for high-performance, low-plasticity and difficult-to-process alloy strips. Background technique: [0002] Silicon steel, also known as electrical steel, is mainly used as the iron core of various motors and transformers and other electrical components. It is an indispensable soft magnetic alloy for electric power, electronics and military industries. With the increase of silicon content, the resistivity and permeability of silicon steel increase, the coercive force and eddy current loss decrease, especially when the silicon content reaches about 6.5% (mass percentage), the magnetostriction coefficient tends to zero (only 0.6×10 -8 ), which can significantly reduce the n...

Claims

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Application Information

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IPC IPC(8): C22C38/02B22D7/00C21D1/18B21B1/22
Inventor 谢建新付华栋张志豪杨强
Owner UNIV OF SCI & TECH BEIJING
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