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Preparation method for thin-strip continuous casting strong Goss texture Fe-Si alloy thin-strip billet

A fe-si and thin strip technology, which is applied in the field of thin strip continuous casting of strong Gaussian textured Fe-Si alloy thin strip billets, can solve problems such as increasing energy consumption, and achieve the effect of reducing casting speed and simplifying process.

Inactive Publication Date: 2018-06-19
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method strictly controls the hot rolling temperature and reduction, and increases energy consumption

Method used

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  • Preparation method for thin-strip continuous casting strong Goss texture Fe-Si alloy thin-strip billet
  • Preparation method for thin-strip continuous casting strong Goss texture Fe-Si alloy thin-strip billet
  • Preparation method for thin-strip continuous casting strong Goss texture Fe-Si alloy thin-strip billet

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Experimental program
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Effect test

Embodiment 1

[0022] In this embodiment, the preparation method of thin strip continuous casting strong Gauss texture Fe-Si alloy thin strip is carried out according to the following steps:

[0023] (1) Smelting molten steel, its composition according to the mass percentage is: C 0.005%, Si 3.0%, Mn 0.20%, Al 0.45%, S 0.005%, N 0.004%, P 0.003%, and the balance is Fe.

[0024] (2) Control the pouring temperature at 1540°C, pour the smelted molten steel through the tundish into the molten pool composed of two counter-rotating casting rolls and side sealing plates to obtain a 2.4mm thick silicon steel casting strip, and then cool it to room temperature . The diameter of the casting roll is 550mm, and the side sealing plate is made of boron nitride. The contact arc angle between the molten steel and the casting roll is 45°, and the casting speed is 20m / min.

[0025] The metallographic structure of the obtained Fe-Si alloy cast strip is as follows figure 1 As shown, the long axis direction o...

Embodiment 2

[0027] In this embodiment, the preparation method of thin strip continuous casting strong Gauss texture Fe-Si alloy thin strip is carried out according to the following steps:

[0028] (1) Smelting molten steel, its composition according to mass percentage is: C 0.004%, Si 2.8%, Mn 0.15%, Al 0.30%, S 0.01%, N 0.008%, P 0.007%, and the balance is Fe.

[0029] (2) Control the pouring temperature to 1550°C, pour the smelted molten steel through the tundish into the molten pool composed of two counter-rotating casting rolls and side sealing plates to obtain a 2.8mm thick silicon steel casting strip, and then cool it to room temperature . The diameter of the casting roll is 550mm, and the side sealing plate is made of boron nitride. The contact arc angle between the molten steel and the casting roll is 38°, and the casting speed is 17m / min.

[0030] The long axis direction of the obtained silicon steel cast strip crystal grains and the normal direction of the cast strip have an i...

Embodiment 3

[0032] In this embodiment, the preparation method of thin strip continuous casting strong Gauss texture Fe-Si alloy thin strip is carried out according to the following steps:

[0033] (1) Smelting molten steel, its composition according to the mass percentage is: C 0.005%, Si 3.2%, Mn 0.27%, Al 0.50%, S 0.008%, N 0.008%, P 0.003%, the balance is Fe.

[0034] (2) Control the pouring temperature to 1530°C, and pour the smelted molten steel through the tundish into the molten pool composed of two counter-rotating casting rolls and side sealing plates to obtain a 2.1mm thick silicon steel casting strip, and then cool it to room temperature . The diameter of the casting roll is 550mm, and the side sealing plate is made of boron nitride. The contact arc angle between the molten steel and the casting roll is 48°, and the casting speed is 22m / min.

[0035] The major axis direction of the grains of the obtained Fe-Si alloy cast strip is inclined at an angle of 30-60° to the normal d...

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Abstract

The invention belongs to the field of silicon steel manufacturing, and particularly relates to a preparation method for a thin-strip continuous casting strong Goss texture Fe-Si alloy thin-strip billet. The preparation method is conducted according to the following steps that (1) molten steel is smelted according to set components which comprise, by weight percentage, less than 0.005% of C, 2.8-3.2% of Si, 0.15-0.30% of Mn, 0.30-0.50% of Al, 0.005-0.01% of S, 0.003-0.008% of N, less than 0.008% of P and the balance Fe; and (2) thin-strip continuous casting is carried out to obtain a 2-3 mm casting strip. The pouring temperature is controlled to be 1530-1560 DEG C, the angle of the arc of contact of the molten steel and a casting roller is 35-50 degrees, and the casting speed is 17-22 m / min. The long axis direction of obtained silicon steel casting strip grains and the casting strip normal direction are at an inclination angle larger than or equal to 20 degrees, the average grain size is about 170-270 micrometers, and the volume fraction of the Goss texture is larger than 4.0%. The preparation method can remarkably improve the Goss texture in the thin-strip continuous casting silicon steel casting strip, the process is simple and stable, and good strip billet materials can be provided for preparation of silicon steel.

Description

technical field [0001] The invention belongs to the field of oriented silicon steel manufacturing, and in particular relates to a method for preparing thin strip continuous casting Fe-Si alloy thin strip billet with strong Gauss texture. Background technique [0002] Oriented silicon steel is an iron-silicon alloy containing about 3% silicon. Its finished sheet has a very strong {110}<001>Gauss (Goss) texture, and the <001> direction of almost all grains is parallel to the rolling direction. So it has very superior magnetization performance. Grain-oriented silicon steel is an important iron core material for transformers. Under the working conditions of a given magnetic field, its extremely high magnetic induction and extremely low iron loss can significantly reduce energy loss, save materials and electric energy. The preparation of grain-oriented silicon steel usually requires strict alloy composition design and complex and precise processing technology. Any pr...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/06B22D11/06
CPCC22C38/02B22D11/0622C22C38/001C22C38/004C22C38/04C22C38/06
Inventor 焦海涛许云波邱文政张元祥曹光明李成刚方烽李建平
Owner NORTHEASTERN UNIV