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Production method of non-oriented electrical steel

A technology of grain-oriented electrical steel and production method, which is applied in the field of steel rolling, can solve the problems of low equiaxed crystallinity, and achieve the effect of improving the equiaxed crystallinity.

Active Publication Date: 2014-02-19
BEIJING SHOUGANG CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a production method of non-oriented electrical steel, which solves the technical problem of low equiaxed grain rate existing in non-oriented electrical steel products

Method used

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  • Production method of non-oriented electrical steel
  • Production method of non-oriented electrical steel
  • Production method of non-oriented electrical steel

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Embodiment 1

[0015] A method for producing non-oriented electrical steel provided in an embodiment of the present invention, comprising:

[0016] (1) Roller electromagnetic stirring technology with 4 pairs of electromagnetic stirring rollers in the secondary cooling section is adopted.

[0017] (2) The electromagnetic stirring parameters of non-oriented electrical steel are set as follows: all 4 pairs of electromagnetic stirring rollers are turned on, the current is 400A, and the frequency is 5Hz.

[0018] (3) During the production of non-oriented electrical steel, the electromagnetic stirring is started when the casting length is 7-9m, and the electromagnetic stirring is automatically turned off after the casting machine stops pouring.

[0019] (4) During the operation of the electromagnetic stirring equipment, control the electromagnetic stirring water flow ≥ 9m 3 / h, pure water conductivity ≤ 50μ / cm.

[0020] (5) The width of the white bright band increases with the increase of the eq...

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Abstract

The invention discloses a production method of non-oriented electrical steel. The method includes the steps of adopting roller type electromagnetic stirring on a secondary cooling section, opening all rollers for electromagnetic stirring, starting the electromagnetic stirring when the casting length is 7-9m and stopping the electromagnetic stirring after a casting machine stops casting, and controlling the water flow rate to be not less than 9 <3> / h and the pure water conductivity to be not more than 50mu in the electromagnetic stirring process. According to the method for improving the equiaxial crystal ratio of the non-oriented electrical steel, the roller type electromagnetic stirring is adopted in the secondary cooling section, the carbon content and nitrogen content of the non-oriented electrical steel are controlled, and therefore the equiaxial crystal ratio of non-oriented electrical steel products can be improved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to a method for increasing the equiaxed crystal ratio of non-oriented electrical steel. Background technique [0002] In the production process of non-oriented electrical steel, due to the low equiaxed crystal ratio of the initial slab, in order to improve the rolling quality of silicon steel and reduce rolling defects such as corrugation in the subsequent rolling process, the solidification structure must be refined in the continuous casting process , Reduce slab center segregation and center porosity, improve inclusion distribution, promote composition homogeneity, and increase equiaxed crystal ratio of non-oriented electrical steel slab. Therefore, the introduction of voestalpine dynamic soft reduction technology and dynamic water distribution technology in the continuous casting machine can achieve very significant effects on refining the solidification structure, reducing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/114
Inventor 张涛毕泽阳胡卫东李志军干明朱江波
Owner BEIJING SHOUGANG CO LTD
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