Method for promoting growth of GOSS textures of silicon steel strips by using pulse current

A pulsed current and high-frequency pulsed current technology, applied in furnaces, heat treatment equipment, heat treatment furnaces, etc., can solve the problems of low efficiency and high energy consumption, and achieve the effects of low energy consumption, reduction of oxidation degree and production cost.

Inactive Publication Date: 2013-05-29
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0004] In order to overcome the problems of high energy consumption and low efficiency in the crystallization process of existing high magnetic induction silicon steel, the present invention provides a method for promoting the growth of GOSS texture of silicon steel strips by using pulse current, so as to reduce energy consumption and improve efficiency. Promote the formation of a large number of GOSS textures in the primary recrystallization process of silicon steel strips, which in turn facilitates the subsequent secondary recrystallization, and obtains silicon steel strips with excellent magnetic properties

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  • Method for promoting growth of GOSS textures of silicon steel strips by using pulse current
  • Method for promoting growth of GOSS textures of silicon steel strips by using pulse current
  • Method for promoting growth of GOSS textures of silicon steel strips by using pulse current

Examples

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Effect test

Embodiment 1

[0040] Example 1 ： The high magnetic induction cold-rolled silicon steel strip with a Si content of 3% is processed, with a width of 30mm and a thickness of 0.3mm.

[0041] refer to figure 1 , the continuous silicon steel strip 7 is driven by the unwinding and rewinding devices to transmit at a speed of 2m / min in the direction of the arrow 6, and the positive and negative electrodes of the pulse power supply 5 are respectively made from the conductive wheels 3 and 4 (conductive wheels) made of copper nickel-clad layers. The diameter is 100mm, and the distance between the electrification segments is 150mm) and is connected to the electrification area segment of the moving silicon steel strip 7 for electrical stimulation. is 300Hz, and the peak value of the current density is 120A / mm 2 , the power-on time is 8 seconds.

[0042] The experiment found that, compared with the cold-rolled silicon steel strip treated by unidirectional high-energy pulse current electrical stimulatio...

Embodiment 2

[0045] Example 2 ： The high magnetic induction cold-rolled silicon steel strip with a Si content of 3% is processed, with a width of 30mm and a thickness of 0.3mm.

[0046] refer to figure 1 , the continuous silicon steel strip 7 is driven by the unwinding and rewinding devices to transmit at a speed of 2.5m / min in the direction of arrow 6, and the positive and negative electrodes of the pulse power supply 5 are respectively connected from the conductive wheels 3 and 4 made of copper nickel-clad layers. The electrified region segment of the moving silicon steel strip 7 was subjected to electrical stimulation treatment. The pulse width of the unidirectional high-energy pulse current applied to the electrified region segment of the silicon steel strip was 85 μs, the frequency was 700 Hz, and the peak value of the current density was 138 A / mm. 2 , the energization time is 8 seconds, and the surface temperature of the silicon steel strip is measured to reach 850 ℃.

[0047] Expe...

Embodiment 3

[0049] Example 3 ： A high magnetic induction cold-rolled silicon steel strip with a Si content of 3% is processed, with a width of 30 mm and a thickness of 0.3 mm.

[0050] refer to figure 1 , the continuous silicon steel strip 7 is driven by the unwinding and rewinding device to transmit in the direction of arrow 6 at a speed of 2m / min. Pulse power supply 5 adopts high-frequency switching pulse power supply, the output waveform is rectangular wave, the frequency is 15-30KHz, and the voltage is 2-12V. The positive and negative poles of the high-frequency switching pulse power supply are respectively connected to the electrified area section of the moving silicon steel strip 7 from the conductive wheels 3 and 4 made of copper nickel-clad layers, and a high frequency of 30KHz and 7.2V is applied during the electrical stimulation treatment. The pulse voltage is applied to the electrified area of ​​the silicon steel strip, the electrification time is 5 seconds, and the surface t...

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Abstract

A method for promoting the growth of silicon steel strip GOSS texture by using pulse current, comprising the following steps: the silicon steel strip is driven by a transmission device to transmit at a speed of 2-10m / min; The energized region section of the silicon steel strip is continuously electrically stimulated in the air atmosphere to promote the generation of a large amount of GOSS texture in the primary recrystallization process; wherein the silicon steel strip is a high magnetic The cold-rolled silicon steel strip has a thickness of 0.1-0.5mm, a width of 10-150mm, and a silicon content of 0.5-6.5%. Compared with the traditional heat treatment furnace annealing process, the method has low energy consumption, high production efficiency, low production cost, and more GOSS texture components in the primary recrystallization process. Through EBSD detection, the GOSS texture content in the silicon steel strip treated with pulse current electrical stimulation is as high as 15-25%.

Description

technical field [0001] The invention belongs to the treatment process of silicon steel strip, in particular a method for promoting the growth of GOSS texture in the primary recrystallization process of silicon steel strip by using pulse current. Many parts, low energy consumption, high production efficiency, and does not require gas protection. Background technique [0002] At present, in order to achieve the purpose of saving energy and protecting the environment, the focus of global attention is on the production process of high-oriented silicon steel, and silicon steel with high-oriented GOSS (Gauss) texture has high magnetic induction, low iron loss, and magnetic induction. It has the characteristics of small expansion and good surface quality, and has become the focus of research and development in the iron and steel fields of various countries. In the production of high magnetic induction silicon steel, in order to obtain a GOSS texture with a high degree of orientati...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/62
Inventor 唐国翌胡国梁
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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