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Method for enhancing hot-rolled Gaussian texture of double-roller ribbon continuous casting oriented silicon steel

A technology of twin-roll strip continuous casting and oriented silicon steel, which is applied in metal rolling and other directions, can solve the problems of low strength of hot-rolled Goss texture and difficulty in manufacturing oriented silicon steel, and achieve enhanced hot-rolled Goss texture and simple process Effect

Inactive Publication Date: 2013-08-21
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention provides a method for enhancing the hot-rolled Goss texture of oriented silicon steel in twin-roll thin strip continuous casting, with the purpose of solving the problems caused by hot-rolled Goss texture under the existing twin-roll thin strip continuous casting conditions. The low structural strength caused the difficulty in the manufacture of grain-oriented silicon steel

Method used

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  • Method for enhancing hot-rolled Gaussian texture of double-roller ribbon continuous casting oriented silicon steel
  • Method for enhancing hot-rolled Gaussian texture of double-roller ribbon continuous casting oriented silicon steel
  • Method for enhancing hot-rolled Gaussian texture of double-roller ribbon continuous casting oriented silicon steel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The chemical composition of grain-oriented silicon steel in the examples is shown in Table 1.

[0025] like figure 1 As shown, molten steel is smelted in an intermediate frequency vacuum induction furnace 1. The molten steel is passed through a twin-roll continuous casting machine 2 to form an oriented silicon steel thin strip 3 with a thickness of 3 mm. It is air-cooled to 1100° C. and is subjected to two passes of asynchronous hot rolling on a hot rolling mill 4. The speed ratio is 1.30, the total reduction ratio is 35%, and the hot-rolled sheet 5 is obtained. After the hot-rolled sheet is cooled to 600°C, it is coiled on the coiler 6 to obtain a hot-rolled sheet of oriented silicon steel with enhanced Goss texture.

[0026] figure 2 is the texture distribution diagram of each thickness layer of the asynchronously hot-rolled grain-oriented silicon steel sheet near the fast roll, where the parameter s Indicates the measurement position of the texture, s= 2 a / d ,i...

Embodiment 2

[0030] The chemical composition of the grain-oriented silicon steel in the examples is shown in Table 2.

[0031] like figure 1 As shown, molten steel is smelted in an intermediate frequency vacuum induction furnace 1. The molten steel is passed through a twin-roll continuous casting machine 2 to form an oriented silicon steel thin strip 3 with a thickness of 10mm. It is air-cooled to 850°C and is subjected to 2 passes of asynchronous hot rolling on a hot rolling mill 4. The speed ratio is 1.10, the total reduction rate is 50%, and the hot-rolled sheet 5 is obtained. After the hot-rolled sheet is cooled to 500°C, it is coiled on the coiler 6 to obtain a hot-rolled sheet of oriented silicon steel with enhanced Goss texture.

[0032] After testing, the surface layer of the asynchronously hot-rolled grain-oriented silicon steel sheet in this example near the fast roll is stronger {001} The fiber texture, the central layer is a diffuse texture, and a strong Gaussian textur...

Embodiment 3

[0036] The chemical composition of grain-oriented silicon steel in the examples is shown in Table 3.

[0037] like figure 1 As shown, molten steel is smelted in an intermediate frequency vacuum induction furnace 1. The molten steel is passed through a twin-roll continuous casting machine 2 to form an oriented silicon steel thin strip 3 with a thickness of 1mm, and is air-cooled to 1200°C for one pass of asynchronous hot rolling on a hot rolling mill 4. The speed ratio is 1.50, the total reduction rate is 10%, and the hot-rolled sheet 5 is obtained. After the hot-rolled sheet is cooled to 700°C, it is coiled on the coiler 6 to obtain a hot-rolled sheet of oriented silicon steel with enhanced Goss texture.

[0038] After testing, the surface layer of the asynchronously hot-rolled grain-oriented silicon steel sheet in this example near the fast roll is stronger {001} The fiber texture, the central layer is a diffuse texture, and a strong Gaussian texture is observed.

...

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Abstract

The invention belongs to the field of oriented silicon steel manufacturing, and in particular relates to a method for enhancing a hot-rolled Gaussian texture of double-roller ribbon continuous casting oriented silicon steel. Steel liquid is smelted by adopting a medium-frequency vacuum induction furnace and forms an oriented silicon steel ribbon which is 1-10 mm thick through double-roller continuous casting; the ribbon is cooled by air to the temperature of 850-1,200 DEG C for performing asynchronous rolling; the differentiate speed ratio is 1.10-1.50; the ribbon is rolled by one gate or two gates; the total press-down rate is controlled to be 10-50 percent; a hot-rolled plate is cooled to the temperature of 500-700 DEG C and then is coiled; and therefore, an oriented silicon steel hot-rolled plate with the enhanced Gaussian texture is obtained. By the method, the hot-rolled Gaussian texture of the double-roller ribbon continuous casting oriented silicon steel can be obviously enhanced by effectively controlling three technical parameters, namely the rolling temperature, the differentiate speed ratio and the total press-down rate. The technology adopted by the invention is simple and stable and can be used for a production flow of the double-roller ribbon continuous casting oriented silicon steel.

Description

[0001] technical field [0002] The invention belongs to the field of oriented silicon steel manufacturing, and in particular relates to a method for enhancing the hot-rolled Goss texture of twin-roll strip continuous casting oriented silicon steel. Background technique [0003] Oriented silicon steel (including ordinary oriented silicon steel and high magnetic induction oriented silicon steel) is a soft magnetic material containing about 3% silicon. Due to its strong {110}(001) Gauss texture, it has low iron loss and High magnetic induction intensity, mainly used in transformer core. The existing production process of grain-oriented silicon steel has problems such as complex equipment, many manufacturing processes, large energy consumption, and large environmental load. Twin-roll thin strip continuous casting is a technology that uses two rotating cooling rolls as crystallizers to directly produce thin strips with liquid metal. It is a short-flow, near-net shape processing...

Claims

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Application Information

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IPC IPC(8): C22C38/04C21D8/12B21B1/46B22D11/06
Inventor 刘海涛宋红宇鲁辉虎刘振宇李成刚曹光明衣海龙王国栋
Owner NORTHEASTERN UNIV
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