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A method for preparing non-oriented silicon steel thin strip with developed {100} plane texture based on thin strip continuous casting

A technology of oriented silicon steel and thin strip, which is applied in the field of metallurgy, can solve the problems of the thickness limitation of finished products, the inability to produce thin-gauge and high-grade non-oriented silicon steel, etc., and achieve the effects of simplified rolling process, specific and feasible manufacturing method, and short process flow

Active Publication Date: 2018-10-16
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

U.S. Patent US5482107 discloses a method for producing electrical steel by thin strip continuous casting. This invention mainly preserves the favorable texture in the as-cast structure by reducing the rolling reduction, but the thickness of the final product is limited, so it cannot produce thin steel. High specification non-oriented silicon steel

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  • A method for preparing non-oriented silicon steel thin strip with developed {100} plane texture based on thin strip continuous casting
  • A method for preparing non-oriented silicon steel thin strip with developed {100} plane texture based on thin strip continuous casting

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Embodiment 1

[0037] In this embodiment, the method for preparing a non-oriented silicon steel strip with a developed {100} plane texture based on strip continuous casting is carried out according to the following steps:

[0038] The molten steel is smelted according to the set composition, and its composition is: C 0.01%, Si 1.5%, Mn 0.2%, Al0.0046%, S 0.002%, and the balance is Fe;

[0039] Strip continuous casting process: molten steel enters the tundish through the gate, the tundish preheating temperature is 1200°C, and the superheating degree is controlled at 45°C. The molten steel enters the thin strip continuous casting machine through the tundish to form a casting strip, and the casting speed is controlled at 45m / min, control the liquid level height of the molten pool to 130mm, and control the thickness of the casting strip to 1.8mm; the proportion of columnar crystals in the non-oriented silicon steel casting strip reaches 80%, and there is a small amount of uniformly distribu...

Embodiment 2

[0045] In this embodiment, the method for preparing a non-oriented silicon steel strip with a developed {100} plane texture based on strip continuous casting is carried out according to the following steps:

[0046] The molten steel is smelted according to the set composition, and its composition by weight percentage is: C 0.04%, Si 2.5%, Mn 0.3%, Al0.0038%, S 0.005%, and the balance is Fe;

[0047] Strip continuous casting process: molten steel enters the tundish through the gate, the preheating temperature of the tundish is 1230°C, and the superheating degree is controlled at 30°C. The molten steel enters the thin strip continuous casting machine through the tundish to form a casting strip, and the casting speed is controlled at 40m / min, control the liquid level height of the molten pool to 110mm, and control the thickness of the cast strip to 1.5mm; the proportion of columnar crystals in the non-oriented silicon steel cast strip is 55%, and there is a small amount of ...

Embodiment 3

[0052] In this embodiment, the method for preparing a non-oriented silicon steel strip with a developed {100} plane texture based on strip continuous casting is carried out according to the following steps:

[0053] The molten steel is smelted according to the set composition, and its composition by weight percentage is: C 0.02%, Si 2.0%, Mn 0.2%, Al0.0043%, S 0.002%, and the balance is Fe;

[0054] Strip continuous casting process: molten steel enters the tundish through the gate, the preheating temperature of the tundish is 1220°C, and the superheating degree is controlled at 40°C. The molten steel enters the thin strip continuous casting machine through the tundish to form a casting strip, and the casting speed is controlled at 60m / min, the liquid level height of the molten pool is controlled to 120mm, and the thickness of the cast strip is controlled to 2.1mm; the proportion of columnar crystals in the non-oriented silicon steel cast strip is 65%, and there is a smal...

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Abstract

The invention belongs to the field of metallurgical technology, and particularly relates to a method for preparing non-oriented silicon steel thin strips with developed {100} surface texture based on continuous casting of thin strips. Follow the following steps: (1) Smelt molten steel according to the set composition. Its composition by weight is: C 0.01~0.05%, Si 1.5~3.0%, Mn 0.2~0.3%, Al≤0.005%, V 0.01~0.04% , S 0.002~0.005%, the balance is Fe and inevitable impurities; (2) Cast strip is formed after thin strip continuous casting process; (3) Hot rolling under inert atmosphere conditions; (4) Pickling to remove oxide scale, Then perform single-stage or two-stage cold rolling; (6) two-stage recrystallization annealing, coating with insulating coating and drying to obtain high-performance non-oriented silicon steel. The present invention provides a method for preparing non-oriented silicon steel thin strips with developed {100} surface texture based on thin strip continuous casting. On the basis of partially utilizing the genetic effect of {100} texture in the initial solidification structure, it provides driving force through subsequent decarburization phase transformation. The force promotes the formation of a developed {100} plane texture in the finished plate, thereby obtaining high-performance non-oriented silicon steel.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for preparing a non-oriented silicon steel strip with a developed {100} surface texture based on strip continuous casting. Background technique [0002] Silicon steel is the most widely used soft magnetic material in industry, and industrial non-oriented silicon steel is the most widely used electrical steel material, which is widely used in various motors. The performance of non-oriented silicon steel sheets is not only directly related to the loss of electric energy, but also determines the performance, volume, weight and cost of products such as motors and transformers. Therefore, reducing iron loss and magnetic anisotropy and increasing magnetic induction have become the research of silicon steel. focus. The <100> of the body-centered cubic crystal is the easy magnetization direction, and the <111> crystal axis is the hard magnetization di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/12B22D11/06
CPCB22D11/06C21D8/1211C21D8/1222C21D8/1233C21D8/1272C22C38/004C22C38/02C22C38/04C22C38/06
Inventor 方烽张元祥兰梦飞卢翔王洋曹光明李成刚袁国王国栋
Owner NORTHEASTERN UNIV LIAONING
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