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High-silicon steel plate strip and preparation method thereof

A technology of steel strips and high-silicon steels, which is applied in the field of preparation of high-silicon steel strips, can solve the problems of poor mechanical properties of strips, poor low-frequency magnetic properties, and reduced mechanical properties, and achieve a process suitable for mass production and simple operation. Effect

Inactive Publication Date: 2020-04-28
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the existence of these factors, the low-frequency magnetic properties of the strip are poor, and it needs to be heat-treated before it can be used.
However, after the strip is heat-treated at high temperature for a long time, the ordered phase will re-precipitate and the mechanical properties of the strip will deteriorate again.
[0005] In summary, the high silicon steel prepared by rapid solidification in the prior art has a large amount of internal stress after rapid cooling, and after heat treatment eliminates it, the appearance of ordered phases will lead to a decrease in mechanical properties

Method used

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  • High-silicon steel plate strip and preparation method thereof
  • High-silicon steel plate strip and preparation method thereof
  • High-silicon steel plate strip and preparation method thereof

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preparation example Construction

[0028] The invention provides a kind of preparation method of high silicon steel strip, comprising the following steps:

[0029] (1) Stack high-silicon steel into steel stacks;

[0030] (2) cold-rolling the steel stack to obtain a cold-rolled steel stack;

[0031] (3) heat-treating the stack of cold-rolled steel to obtain the high-silicon steel strip.

[0032] In the present invention, the high silicon steel in the step (1) is preferably produced by rapid solidification.

[0033] In the present invention, the rapid solidification method is preferably the strip-spinning method.

[0034] In the present invention, the steel stacks are obtained by neatly stacking high-silicon steels, and the size of the steel stacks is controlled according to actual production requirements.

[0035] In the present invention, the steel stack can be placed in a stainless steel sheath for fixing, and the stainless steel sheath is welded and sealed after being placed. The covering is mainly used f...

Embodiment 1

[0043] Step 1: Raw material preparation, the Fe-6.5wt% Si high silicon steel strip with a thickness of 0.035mm and a width of 55mm prepared by the 6-layer rapid solidification method is prepared according to figure 1 (a) Stacked. The neatly stacked strips are placed in a stainless steel sheath for fixation, and the stainless steel sheath is welded and sealed after placement.

[0044] Step 2: Rolling at room temperature: cold-rolling the wrapped high-silicon steel strip with a large amount of deformation, and cold-rolling with a deformation amount of 10% in each pass until the thickness of the sheet is 0.05 mm.

[0045] Step 3: Heat treatment: remove the stainless steel sheath, heat the rolled plate and strip to 1000°C at a rate of 8°C / min under a vacuum of 0.1Pa, then keep it warm for 3 hours, and conduct vacuum heat treatment to make the interlayer metallurgical bonding , to obtain a high-silicon steel strip with a thickness of 0.05 mm, a width of 57 mm, fine grains, and hig...

Embodiment 2

[0048] Step 1: raw material preparation, the Fe-6.5wt%Si high silicon steel strip with a thickness of 0.035mm and a width of 55mm prepared by the 12-layer rapid solidification strip method is prepared according to figure 1 (a) Stacked. The neatly stacked strips are placed in a stainless steel sheath for fixation, and the stainless steel sheath is welded and sealed after placement.

[0049] Step 2: Rolling at room temperature: cold-rolling the wrapped high-silicon steel strip with a large amount of deformation, and cold-rolling with a deformation amount of 5% in each pass until the thickness of the sheet is 0.1 mm.

[0050] Step 3: Heat treatment: remove the stainless steel sheath, heat the rolled plate and strip to 1000°C at a rate of 10°C / min under a vacuum of 0.1Pa, then keep it warm for 3 hours, and conduct vacuum heat treatment to make the interlayer metallurgical bond , to obtain a high-silicon steel strip with a thickness of 0.1 mm, a width of 57 mm, fine grains, and hi...

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Abstract

The invention provides a large-size high-plasticity high-silicon steel plate strip and a preparation method thereof, and belongs to the field of metal material preparation. The high-silicon steel strips prepared through rapid solidification melt-spinning is stacked in the width direction and the thickness direction, large-deformation cold rolling and heat treatment are carried out, and the finallyobtained high-silicon steel plate strip is controllable in width and thickness and outstanding in strength and room-temperature plasticity.

Description

technical field [0001] The invention belongs to the field of metal material preparation, and in particular relates to a method for preparing a high-silicon steel strip with controllable dimensions and room-temperature plasticity through a process of stacking and rolling combined with heat treatment. Background technique [0002] Silicon steel is the most widely used metal soft magnetic material, widely used in the iron core of generators, motors, transformers, etc. With the increase of silicon content, the electrical conductivity of silicon steel increases, the magnetic permeability increases, and the iron loss decreases. The high-silicon steel containing 6.5wt% silicon has more obvious reduction in high-frequency iron loss, and because the magnetostriction coefficient is basically zero, it can significantly reduce noise. It can be used in high-speed motors, high-frequency transformers, etc. to achieve the purpose of energy saving and noise reduction. However, the high sili...

Claims

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Application Information

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IPC IPC(8): B21B1/38B21B47/00C21D9/52
CPCB21B1/38B21B47/00B21B2001/386C21D9/52
Inventor 梁永锋陈彪林均品叶丰刘斌斌张来启
Owner UNIV OF SCI & TECH BEIJING