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A kind of ultra-thin silicon steel strip and preparation method thereof

A silicon steel strip and ultra-thin technology, which is applied in the field of ultra-thin silicon steel strip and its preparation, can solve the problems of strip cracking, large strip fluctuation, and low lamination coefficient, and achieve low width and size requirements and production The effect of high efficiency and simple operation

Active Publication Date: 2022-02-08
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is that the silicon steel sheet produced by the strip manufacturing method in the prior art is rolled by silicon steel sheets that cannot be applied to different thicknesses, and the strip is prone to cracking and broken strips during the rolling process. , the magnetic performance of the finished silicon steel sheet cannot be guaranteed; and because the strip fluctuates greatly in the vertical direction, the lamination coefficient is low, resulting in the quality of the finished iron core cannot be guaranteed

Method used

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  • A kind of ultra-thin silicon steel strip and preparation method thereof
  • A kind of ultra-thin silicon steel strip and preparation method thereof

Examples

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Effect test

Embodiment 1

[0037] This embodiment provides a method for preparing an ultra-thin silicon steel strip, the steps are as follows:

[0038] Material selection: slitting oriented silicon steel coils are oriented silicon steel strips with a thickness of 0.30mm and a width of 300mm;

[0039] Pickling: Send the above-mentioned silicon steel strip to the pickling tank for pickling. The pickling tank is an aqueous hydrochloric acid solution with a concentration of 5wt%. A heating plate is installed in the pickling tank to ensure that the pickling temperature is 80°C. The time is 6 minutes, and the grain-oriented silicon steel strip without bottom layer is obtained;

[0040] Cold rolling: three rolling processes through a 20-high rolling mill, among which,

[0041] The first reduction ratio is 45%, the first total rolling force is 35T, the pre-tension stress of the rolling roll is 20KN, and the post-tension stress of the rolling roll is 15KN.

[0042]The second reduction ratio is 35%, the second ...

Embodiment 2

[0051] This embodiment provides a method for preparing an ultra-thin silicon steel strip, the steps are as follows:

[0052] Material selection: slitting oriented silicon steel coils are oriented silicon steel strips with a thickness of 0.27mm and a width of 280mm;

[0053] Pickling: Send the above-mentioned silicon steel strip to the pickling tank for pickling. The pickling tank is an aqueous hydrochloric acid solution with a concentration of 30wt%. A heating plate is installed in the pickling tank to ensure that the pickling temperature is 100°C. The time is 5min, and the oriented silicon steel strip without bottom layer is obtained;

[0054] Cold rolling: three rolling processes through a 20-high rolling mill, among which,

[0055] The first reduction rate is 50%, the first total rolling force is 25T, the pre-tension stress of the rolling roll is 17KN, and the post-tension stress of the rolling roll is 13KN.

[0056] The second reduction ratio is 20%, the second total rol...

Embodiment 3

[0064] This embodiment provides a method for preparing an ultra-thin silicon steel strip, the steps are as follows:

[0065] Material selection: slitting oriented silicon steel coils are oriented silicon steel strips with a thickness of 0.27mm and a width of 350mm;

[0066] Pickling: Send the above-mentioned silicon steel strip to the pickling tank for pickling. The pickling tank is an aqueous hydrochloric acid solution with a concentration of 10 wt%. A heating plate is installed in the pickling tank to ensure that the pickling temperature is 100°C. The time is 3min, and the oriented silicon steel strip without bottom layer is obtained;

[0067] Cold rolling: three rolling processes through a 20-high rolling mill, among which,

[0068] The first reduction rate is 53%, the first total rolling force is 30T, the pre-tension stress of the rolling roll is 20KN, and the post-tension stress of the rolling roll is 15KN.

[0069] The second reduction ratio is 25%, the second total ro...

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Abstract

The invention discloses an ultra-thin silicon steel strip and a preparation method thereof, which comprises the following steps: material selection, cold rolling and post-treatment. Material selection: select the oriented silicon steel strip; cold rolling: roll the oriented silicon steel strip at least once in a rolling mill to obtain a cold-rolled strip with a total reduction rate of 65%-80%; post-processing: the cold rolled strip The rolled strip is annealed to obtain the finished silicon steel strip. The preparation method of the ultra-thin silicon steel strip provided by the present invention, on the one hand, avoids the twinning phenomenon of the strip; on the other hand, improves the guarantee that the silicon steel strip has no edge cracks, realizes the control of the edge wave height, and improves the magnetic properties of the sub-finished silicon steel sheet .

Description

technical field [0001] The invention relates to the technical field of oriented silicon steel strip rolling, in particular to an ultra-thin silicon steel strip and a preparation method thereof. Background technique [0002] Ultra-thin silicon steel refers to the iron-silicon alloy strip with a thickness of ≤0.1mm, which is mainly used for making iron cores of anode saturated reactors, choke coils, inductance coils and other devices under medium and high frequency conditions of ≥400Hz. Ultra-thin silicon steel is mainly processed and prepared by high magnetic induction oriented silicon steel finished product as raw material. Due to the particularity of the raw material structure - the grain size is large, for example, some grains can reach more than 5cm, so the strip itself is brittle and hard. Edge cracks and strip breaks are prone to occur during the rolling process. [0003] At present, the Chinese patent application publication number CN104438325A discloses a method for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12
CPCC21D8/1233C21D8/1272
Inventor 何承绪孟利马光杨富尧刘洋高洁吴雪程灵韩钰陈新
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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