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Medium-temperature common oriented silicon steel and preparation method thereof

A common technology for oriented silicon steel, which is applied in the field of medium-temperature ordinary oriented silicon steel and its preparation, can solve problems such as edge cracks, cracks, and broken bands, and achieve the effects of reducing edge cracks, reducing hardness, and improving atmosphere

Active Publication Date: 2021-10-01
湖南华菱涟源钢铁有限公司 +1
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Problems solved by technology

[0005] This application provides a medium-temperature ordinary oriented silicon steel and its preparation method, aiming to solve the problems of edge cracks, cracks and even broken strips in the process of pickling, trimming and cold rolling of silicon steel

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  • Medium-temperature common oriented silicon steel and preparation method thereof
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  • Medium-temperature common oriented silicon steel and preparation method thereof

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[0034] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, not to limit the present application.

[0035] The applicant noticed that the existing medium-temperature ordinary grain-oriented silicon steel is prone to micro-cracks, small cracks, and even serious edge cracks after cold-rolling process, which eventually leads to large fissions and even broken belt accidents. Through further research, the applicant found that due to the high silicon content, coarse grains and high brittleness of ordinary grain-oriented silicon steel at medium temperature, the grains tend to grow excessively during the heating process, and the corners of the slab are more likely to be decarburized. Therefore, the silicon steel The qual...

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Abstract

The invention relates to medium-temperature common oriented silicon steel and a preparation method thereof. The preparation method sequentially comprises the steps of heating, descaling, controlled rolling, controlled cooling and coiling. The edge part structure type, the edge part decarburization width and the edge part grain size of the silicon steel are respectively controlled in the heating, controlled rolling, controlled cooling and coiling processes, so that the cracking rate of the subsequent cold rolling procedure is reduced, and the yield is improved. According to the preparation method of the medium-temperature common oriented silicon steel, the atmosphere of a heating furnace is improved, the rolling process is optimized and controlled, the cooling process is optimized and controlled, and the steel loading distance of a plate blank is adjusted, the edge part hardness of the prepared silicon steel is obviously reduced, and in the subsequent cold rolling process, the serious cracking rate is obviously reduced.

Description

technical field [0001] This application relates to the silicon steel manufacturing industry, in particular to a medium-temperature ordinary grain-oriented silicon steel and a preparation method thereof. Background technique [0002] Oriented silicon steel can be divided into high magnetic induction oriented silicon steel (HiB) and common oriented silicon steel (CGO) according to performance. Ordinary oriented silicon steel can be divided into high temperature oriented silicon steel (slab heating temperature is greater than 1350 ℃) and medium temperature oriented silicon steel according to the heating temperature of the slab. Oriented silicon steel (slab heating temperature 1250°C-1320°C). [0003] In the existing billet processing technology, the oriented silicon steel produced often has edge cracks, cracks and even broken strips in the process of pickling, edge trimming and cold rolling, which seriously affects the product yield and further affects the silicon steel factory...

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Application Information

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IPC IPC(8): B21B1/22B21B15/00B21B37/28B21B37/76B21B45/02B21B45/06B21B45/08
CPCB21B1/22B21B15/00B21B37/28B21B37/76B21B45/0218B21B45/06B21B45/08B21B2015/0057C21D2211/005C21D2211/003C21D2211/009
Inventor 龙明建邓必荣朱业超唐浩杨秀枝许光王自荣熊智威蔡苗李江波王刚张耀江
Owner 湖南华菱涟源钢铁有限公司
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