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A Method for Enhancing the {100} Recrystallization Texture of Thin Strip Continuous Casting Non-Oriented Silicon Steel

A technology of oriented silicon steel and recrystallization, applied in the field of metallurgy, can solve the problem of insufficient high magnetic induction non-oriented silicon steel, save equipment investment and energy consumption, improve recrystallization texture, and save the effect of hot rolling process

Inactive Publication Date: 2019-04-12
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In summary, these technical solutions are still insufficient in the preparation of high magnetic induction non-oriented silicon steel

Method used

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  • A Method for Enhancing the {100} Recrystallization Texture of Thin Strip Continuous Casting Non-Oriented Silicon Steel
  • A Method for Enhancing the {100} Recrystallization Texture of Thin Strip Continuous Casting Non-Oriented Silicon Steel
  • A Method for Enhancing the {100} Recrystallization Texture of Thin Strip Continuous Casting Non-Oriented Silicon Steel

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Experimental program
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Effect test

Embodiment 1

[0026] In this embodiment, the method for enhancing the {100} recrystallization texture of thin strip continuous casting non-oriented silicon steel is carried out according to the following steps:

[0027] (1) Smelting and continuous casting: molten steel for smelting, the composition is: C 0.004%, Si 3.3%, Al 0.5%, Mn 0.2%, P0.005%, S 0.003%, N 0.003%, B 0.004%, and the rest is iron. A thin strip continuous casting machine was used to obtain a 2.4mm cast strip, which was crimped and then cooled to room temperature.

[0028] (2) Cold rolling: The cast strip is directly cold rolled to 0.5mm after pickling.

[0029] (3) The first stage annealing: the cold-rolled sheet is annealed, the annealing temperature is 900°C, the holding time is 21s, the heating rate is 25°C / s, the cooling rate is 30°C / s, and the recrystallization rate is 43%. The role of the first stage annealing is to make Goss and Cube grains nucleate preferentially at the shear band.

[0030] (4) Second-stage annea...

Embodiment 2

[0034] In this embodiment, the method for enhancing the {100} recrystallization texture of thin strip continuous casting non-oriented silicon steel is carried out according to the following steps:

[0035] (1) Smelting and continuous casting: molten steel for smelting, divided into: C 0.004%, Si 3.0%, Al 0.7%, Mn 0.3%, P0.005%, S0.003%, N 0.003%, B 0.004%, the rest for iron. A thin strip continuous casting machine was used to obtain a 2.4 mm cast strip, which was crimped and then cooled to room temperature.

[0036] (2) Cold rolling: The cast strip is directly cold rolled to 0.5mm after pickling.

[0037] (3) The first stage annealing: the cold-rolled sheet is annealed, the annealing temperature is 800°C, the holding time is 27s, the heating rate is 20°C / s, the cooling rate is 30°C / s, and the recrystallization rate is 48%.

[0038] (4) Second-stage annealing: the primary annealed plate is subjected to the second annealing, the annealing temperature is 400°C, the holding time...

Embodiment 3

[0042] In this embodiment, the method for enhancing the {100} recrystallization texture of thin strip continuous casting non-oriented silicon steel is carried out according to the following steps:

[0043] (1) Smelting and continuous casting: molten steel for smelting, the composition is: C 0.004%, Si 2.5%, Al 0.4%, Mn 0.2%, P0.008%, S 0.004%, N 0.003%, B 0.003%, and the rest is iron. A thin strip continuous casting machine was used to obtain a 3.0mm cast strip, which was crimped and then cooled to room temperature.

[0044] (2) Cold rolling: The cast strip is directly cold rolled to 0.5mm after pickling.

[0045] (3) The first stage of annealing: the cold-rolled sheet is annealed, the annealing temperature is 1000°C, the holding time is 16s, the heating rate is 30°C / s, the cooling rate is 40°C / s, and the recrystallization rate is 58%.

[0046] (4) Second-stage annealing: the first-annealed plate is subjected to the second annealing, the annealing temperature is 550°C, the h...

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Abstract

The invention belongs to the field of metallurgical technology, and particularly relates to a method for enhancing the recrystallization texture of thin strip continuous cast non-oriented silicon steel {100}. The non-oriented silicon steel cast strip prepared by thin strip continuous casting is directly cold rolled to the finished thickness, and then annealed at 800-1000°C for 16-27 seconds to control the recrystallization rate of 40-60%. Then it is kept at 400-550°C for 30-120 minutes, and then annealed at 1000-1100°C for 2-5 minutes to obtain a non-oriented silicon steel finished plate, whose {100} recrystallization texture ratio can be increased to more than 30%. The present invention significantly enhances the {100} recrystallization texture by controlling the recrystallization and growth process of the cold-rolled structure of non-oriented silicon steel. The method is simple and effective.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a method for enhancing the {100} recrystallization texture of thin strip continuous casting non-oriented silicon steel. Background technique [0002] Non-oriented silicon steel is mainly used in the preparation of iron core materials for motors, generators and other equipment. It is an indispensable and important soft magnetic alloy for electric power, electronics and military industries. Magnetic induction and iron loss are two main properties of non-oriented silicon steel, which directly affect the energy conversion efficiency of electrical equipment. Under a specific composition, the magnetic properties are mainly affected by the grain size and crystal texture, in which the former mainly affects the iron loss, while the latter affects both the magnetic induction and the iron loss. For the Fe-Si alloy of BCC, the <001> direction is the easy magnetization d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21D8/12C22C38/02C22C38/04C22C38/06
CPCC21D8/1211C21D8/1233C21D8/1244C22C38/02C22C38/04C22C38/06
Inventor 焦海涛许云波张元祥曹光明李成刚李建平
Owner NORTHEASTERN UNIV