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Method for preparing high-magnetic-strength non-oriented silicon steel thin products on basis of thin-strip 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, improving production rhythm, and expanding temperature range

Active Publication Date: 2017-08-18
NORTHEASTERN UNIV
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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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  • Method for preparing high-magnetic-strength non-oriented silicon steel thin products on basis of thin-strip casting
  • Method for preparing high-magnetic-strength non-oriented silicon steel thin products on basis of thin-strip casting

Examples

Experimental program
Comparison scheme
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 technical field of metallurgy, and particularly relates to a method for preparing high-magnetic-strength non-oriented silicon steel thin products on the basis of thin-strip casting. The method comprises the following steps: (1) smelting molten steel according to set ingredients, wherein the molten steel comprises the following ingredients in percentages by mass: less than or equal to 0.003% of C, 2.0-3.5% of Si, less than or equal to 0.01% of Mn, less than or equal to 0.003% of Al, 0.02-0.06% of P, less than or equal to 0.003% of S, and the balance of Fe and inevitable impurities; (2) carrying out thin-strip casting to obtain a cast strip; (3) carrying out hot rolling under the condition of an inert atmosphere; (4) reeling the cast strip after the cast strip is cooled to the temperature of 650 DEG C, removing iron oxide scale and then carrying out single-stage multi-pass cold rolling; and (5) carrying out continuous annealing on the cold rolled strip, coating the cold rolled strip with an insulating layer and then drying the insulating layer to obtain the high-performance non-oriented silicon steel thin products. The method is based on a thin-strip casting technology, the process is simplified, the production cost is reduced, and the magnetic performance of the non-oriented silicon steel thin finished products is improved.

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 Applications(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
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