Method for producing non-oriented silicon steel by virtue of continuous casting and rolling flow of non-oriented silicon steel and thin slabs

A thin slab continuous casting, oriented silicon steel technology, applied in metal rolling and other directions, can solve the problems of affecting the magnetic properties and surface quality of finished products, prone to corrugated defects, and less continuous casting billets.

Active Publication Date: 2018-08-07
INNER MONGOLIA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The existing thin slab continuous casting and rolling production process of low-grade non-oriented silicon steel is basically mature, but for high-grade non-oriented silicon steel, especially when the silicon content is greater than 2.5%, it is all produced by the traditional thick slab process, because the thin slab The continuous casting and rolling process has the characteristics of fast cooling speed and no electromagnetic stirring. The continuous casting slab has fewer equiaxed crystals

Method used

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  • Method for producing non-oriented silicon steel by virtue of continuous casting and rolling flow of non-oriented silicon steel and thin slabs
  • Method for producing non-oriented silicon steel by virtue of continuous casting and rolling flow of non-oriented silicon steel and thin slabs

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Embodiment 1

[0056] The method for producing non-oriented silicon steel in the thin slab continuous casting and rolling process of this embodiment includes the following steps:

[0057] Step A: Smelting;

[0058] In the smelting process of step A, the converter smelting is carried out first, and then the RH refining treatment is carried out. After the treatment, the mass percentage of the chemical composition of the molten steel terminal is:

[0059] Si: 2.5%, Al: 1.5%, Mn: 1.5%, [S+O+C+N+Ti]: 76ppm, La: 0.005%, the balance is Fe and other impurity elements;

[0060] Add the rare earth elements 1 minute after the RH refining and alloying is completed, and stir after adding the rare earth elements for 3 minutes;

[0061] Step B: Continuous casting;

[0062] In the continuous casting process of step B, the drawing speed is controlled to 4.6 m / min, and the continuous casting obtains a slab with a thickness of 70 mm; wherein, the superheat of the tundish is controlled to -5°C, and the equiaxed crystal ra...

Embodiment 2

[0073] The method for producing non-oriented silicon steel in the thin slab continuous casting and rolling process of this embodiment includes the following steps:

[0074] Step A: Smelting;

[0075] In the smelting process of step A, the converter smelting is carried out first, and then the RH refining treatment is carried out. After the treatment, the mass percentage of the chemical composition of the molten steel terminal is:

[0076] Si: 3.0%, Al: 1.0%, Mn: 1.0%, [S+O+C+N+Ti]: 70ppm, (La+Ce): 0.008%, the balance is Fe and other impurity elements;

[0077] Add the rare earth element 2 minutes after the end of the RH refining and alloying, and stir after adding the rare earth element for 4 minutes;

[0078] Step B: Continuous casting;

[0079] In the continuous casting process of step B, the drawing speed is controlled to 3.5 m / min, and the casting slab with a thickness of 50 mm is obtained by continuous casting; wherein, the superheat of the tundish is controlled at -5°C, and the equi...

Embodiment 3

[0090] The method for producing non-oriented silicon steel in the thin slab continuous casting and rolling process of this embodiment includes the following steps:

[0091] Step A: Smelting;

[0092] In the smelting process of step A, the converter smelting is carried out first, and then the RH refining treatment is carried out. After the treatment, the mass percentage of the chemical composition of the molten steel terminal is:

[0093] Si: 3.5%, Al: 0.10%, Mn: 0.10%, [S+O+C+N+Ti]: 67ppm, rare earth elements (La+Ce+Nd): 0.01%, the balance is Fe and other impurity elements ;

[0094] Add the rare earth element 2 minutes after the end of the RH refining and alloying, and stir after adding the rare earth element for 4 minutes;

[0095] Step B: Continuous casting;

[0096] In the continuous casting process of step B, the drawing speed is controlled to 2.8 m / min, and the continuous casting obtains a slab with a thickness of 30 mm; wherein, the superheat of the tundish is controlled at -6°C,...

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Abstract

The invention discloses a method for producing non-oriented silicon steel by virtue of a continuous casting and rolling flow of non-oriented silicon steel and thin slabs, and relates to non-oriented silicon steel and a production method thereof. The method comprises the following steps: (A) smelting, (B) continuous casting, (C) heating, (D) hot continuous rolling, (E) acid pickling, (F) cold rolling and (G) recrystallization annealing. According to the method, qualified high-grade non-oriented silicon steel is prepared by virtue of the thin slab casting and rolling flow.

Description

Technical field [0001] The invention relates to a non-oriented silicon steel and a production method thereof, and more specifically, to a method for producing high-grade and high-efficiency non-oriented silicon steel by an impermanent process of non-oriented silicon steel and thin slab continuous casting and rolling process. Background technique [0002] There are currently published thin slab continuous casting and rolling processes for producing non-oriented silicon steel, such as patent publication number: CN102134675 A, patent publication number: CN 101906577 A, and patent publication number: CN 103088253 A. The patent applications are basically low-grade. Or medium-grade non-oriented silicon steel production method. [0003] The existing thin slab continuous casting and rolling process for producing low- and medium-grade non-oriented silicon steel is basically mature, but for high-grade non-oriented silicon steel, especially when the silicon content is greater than 2.5%, the t...

Claims

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Application Information

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IPC IPC(8): C22C38/06C22C38/02C22C38/04C21D8/12B21B1/46
CPCB21B1/463C21D8/1211C22C38/005C22C38/02C22C38/04C22C38/06
Inventor 樊立峰朱蓉郭锋何建中陆斌张文博乔继强华国龙
Owner INNER MONGOLIA UNIV OF TECH
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