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A method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting

A technology of oriented silicon steel and high magnetic induction, which is applied in the field of metallurgy, can solve problems such as inability to mass-produce and affect the lamination coefficient, and achieve the effects of reducing high-frequency iron loss, increasing production rhythm, and improving recrystallization

Active Publication Date: 2018-07-03
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this patent document, the use of hot-rolled coil uncoiling for cold-rolled lamination will seriously affect the lamination coefficient, and it cannot be used in large-scale production.

Method used

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  • A method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting
  • A method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting

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Experimental program
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Effect test

Embodiment 1

[0032] In this embodiment, the method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting is carried out according to the following steps:

[0033] The molten steel is smelted according to the set composition, and its composition by weight percentage is: C 0.006%, Si 2.0%, Mn 0.4%, Al 0.003%, P 0.04%, S 0.0025%, and the balance is Fe;

[0034] Strip continuous casting process: molten steel enters the tundish through the gate, the preheating temperature of the tundish is 1230°C, the superheat is controlled at 30°C, the molten steel enters the strip continuous casting machine through the tundish, the liquid level is controlled at 120mm, and the casting speed is 60m / min, a molten pool is formed and solidified in the crystallizer composed of rotating casting rolls and side sealing plates, and the thickness of the casting strip is 1.5mm;

[0035] After the cast strip is taken out of the roll, it is cooled t...

Embodiment 2

[0040] In this embodiment, the method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting is carried out according to the following steps:

[0041] Smelting molten steel according to the set composition, its composition by weight percentage is: C 0.0052%, Si 2.2%, Mn0.35%, Al 0.003%, P 0.05%, S 0.0022%, and the balance is Fe;

[0042] Strip continuous casting process: molten steel enters the tundish through the gate, the preheating temperature of the tundish is 1230°C, the superheat is controlled at 30°C, the molten steel enters the strip continuous casting machine through the tundish, the liquid level is controlled at 120mm, and the casting speed is 60m / min, a molten pool is formed and solidified in the crystallizer composed of rotating casting rolls and side sealing plates, and the thickness of the casting strip is 1.5mm;

[0043] After the cast strip is taken out of the roll, it is cooled to 950°C a...

Embodiment 3

[0047] In this embodiment, the method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting is carried out according to the following steps:

[0048] Smelting molten steel according to the set composition, its composition by weight percentage is: C 0.004%, Si 3.0%, Mn 0.2%, Al 0.0015%, P 0.03%, S 0.0018%, and the balance is Fe;

[0049] Strip continuous casting process: molten steel enters the tundish through the gate, the preheating temperature of the tundish is 1250°C, the superheat is controlled at 20°C, the molten steel enters the thin strip continuous casting machine through the tundish, the liquid level is controlled at 100mm, and the casting speed is 70m / min, a molten pool is formed and solidified in the crystallizer composed of rotating casting rolls and side sealing plates, with a thickness of 1.2mm;

[0050] After the cast strip is taken out of the roll, it is cooled to 900°C at a rate of 70°C / ...

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Abstract

The invention belongs to the field of metallurgical technology, and particularly relates to a method for preparing high magnetic induction non-oriented silicon steel thin specification products based on thin strip continuous casting. Follow the following steps: (1) Smelt molten steel according to the set composition. Its composition in mass percentage is: C≤0.003%, Si 2.0~3.5%, Mn≤0.01%, Al≤0.003%, P 0.02~0.06%, S≤0.003%, the balance is Fe and unavoidable impurities; (2) thin strip continuous casting to obtain cast strip; (3) hot rolling under inert atmosphere conditions; (4) cooling to 650°C and coiling, removing iron oxide scale The thick steel strip is subjected to single-stage multi-pass cold rolling; (5) the cold-rolled strip is continuously annealed, then coated with an insulating layer and dried to obtain high-performance non-oriented silicon steel thin specification products. The method of the present invention is based on thin strip continuous casting technology, simplifies the process, reduces production costs, and improves the magnetic properties of non-oriented silicon steel thin-spec finished products.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for preparing thin gauge products of high magnetic induction non-oriented silicon steel based on thin strip continuous casting. Background technique [0002] Silicon steel is an indispensable energy-saving metal soft magnetic material in the electric power, electronics and military industries. Thin gauge non-oriented silicon steel is mainly used as the core material of medium and high frequency (400Hz~10kHz) motors and micro motors, and has always been a shortage in the Chinese market. kind of material. Non-oriented silicon steel thin-gauge products generally refer to electrical steel with a silicon content of 1.0-4.0% and a thickness of 0.08-0.20mm. With its low iron loss and high magnetic induction characteristics, it is used on the stator and rotor cores of medium and high frequency motors . With the global energy shortage and climate warming, energy ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C21D8/12C21D1/26C21D1/74
CPCC21D1/26C21D1/74C21D8/1222C21D8/1272C22C38/002C22C38/004C22C38/02C22C38/04C22C38/06
Inventor 李成刚方烽兰梦飞张元祥卢翔王洋曹光明袁国王国栋
Owner NORTHEASTERN UNIV LIAONING
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