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A kind of low-grade non-oriented electrical steel and its manufacturing method

A technology of oriented electrical steel and manufacturing method, applied in the direction of temperature control, etc., can solve the problems of poor rolling stability of low-grade non-oriented electrical steel, affecting the size and shape accuracy of low-grade non-oriented electrical steel hot-rolled coils, and achieving Effects of improving dimension and shape accuracy and stabilizing the finish rolling process

Active Publication Date: 2022-07-15
SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a low-grade non-oriented electrical steel and its manufacturing method to solve or partially solve the problem of poor rolling stability of low-grade non-oriented electrical steel, which affects the size and plate size of hot-rolled coils of low-grade non-oriented electrical steel. The technical problem of type precision

Method used

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  • A kind of low-grade non-oriented electrical steel and its manufacturing method
  • A kind of low-grade non-oriented electrical steel and its manufacturing method
  • A kind of low-grade non-oriented electrical steel and its manufacturing method

Examples

Experimental program
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Effect test

Embodiment 1

[0043] The scheme provided by the invention is applied to 50W1000, and a batch of 22 rolls is rolled in total, and its process control is as follows:

[0044] Al element content: 0.9%~1.1%;

[0045] Slab temperature control: 1153~1172℃;

[0046] Rough rolling RT2 temperature control: 1027~1043℃;

[0047] Finish rolling and finishing rolling temperature control: 907~932℃;

[0048] After the hot rolling is completed, the size of the coil and the qualified rate of the plate shape are counted, and the magnetic properties are tested according to the requirements of GB / T 2521.1-2016.

Embodiment 2

[0050] The scheme provided by the present invention is applied to 50W800, and a batch of 32 rolls is rolled in total, and its process control is as follows:

[0051] Al element content: 1.4%~1.6%;

[0052] Slab temperature control: 1164~1198℃;

[0053] Rough rolling RT2 temperature control: 1008~1038℃;

[0054] Finish rolling and finishing rolling temperature control: 901~938℃;

[0055] After the hot rolling is completed, the size of the coil and the qualified rate of the plate shape are counted, and the magnetic properties are tested according to the requirements of GB / T 2521.1-2016.

Embodiment 3

[0057] The scheme provided by the invention is applied to 50W1300, and a batch of 30 rolls is rolled in total, and its process control is as follows:

[0058] Al element content: 0.6%~1.0%;

[0059] Slab temperature control: 1151~1179℃;

[0060] Rough rolling RT2 temperature control: 1021~1047℃;

[0061] Finish rolling and finishing rolling temperature control: 901~938℃;

[0062] After the hot rolling is completed, the size of the coil and the qualified rate of the plate shape are counted, and the magnetic properties are tested according to the requirements of GB / T 2521.1-2016.

[0063] Corresponding to Examples 1 to 3, the historical steel coil production data before applying the solution of the present invention is counted, and the details are as follows:

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Abstract

The invention discloses a method for manufacturing a low-grade non-oriented electrical steel, comprising: during steelmaking, increasing the aluminum element content of a slab of the low-grade non-oriented electrical steel by 0.08% to 0.08% by weight. 0.12%; when the hot-rolled slab is heated, the unheated temperature of the slab is controlled to be 1150°C to 1200°C; when the hot-rolled rough rolling is performed, the rough rolling RT2 temperature of the slab is controlled to be 1000 to 1050°C; the above The method is to increase the phase transition temperature of the low-grade non-oriented electrical steel by increasing the aluminum content, combined with the temperature control of the slab and the RT2 temperature control of the rough rolling, to ensure that the low-grade non-oriented electrical steel will not be affected by the phase transition during the finishing rolling process. The rolling force fluctuates due to variable area rolling, thereby stabilizing the finishing rolling process and improving the size and shape accuracy of the low-grade non-oriented electrical steel coil after finishing rolling.

Description

technical field [0001] The present application relates to the technical field of electrical steel, in particular to a low-grade non-oriented electrical steel and a manufacturing method thereof. Background technique [0002] In the production process of low-grade electrical steel, there are mainly four production processes: steelmaking, hot rolling, continuous cold rolling, and annealing. The process stability of steelmaking and hot rolling directly affects the performance stability of low-grade products. For low-grade non-oriented electrical steel, due to the characteristics of its hot rolling process, the rolling stability is often reduced, which increases the fluctuation of the size, shape and rolling temperature of the hot-rolled sheet of electrical steel. The rolling process cannot be compensated, which will eventually lead to large fluctuations in the size and performance of low-grade electrical steel products, reducing the stability of use by users, and reducing market...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/06C21D8/12B21B37/74
CPCC22C38/06C21D8/1222B21B37/74
Inventor 李盈程林刘玉金张保磊胡志远周晓琪侍爱臣马琳
Owner SHOUGANG ZHIXIN QIAN AN ELECTROMAGNETIC MATERIALS CO LTD
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