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Electromagnetic stirring method for high-carbon steel secondary cooling zone

A technology of electromagnetic stirring and electromagnetic stirrer, which is applied in the field of iron and steel metallurgy, can solve the problems of cumbersome process and high equipment requirements, and achieve the effect of simple operation method, reducing the degree of carbon segregation, and reducing the phenomenon of white and bright bands

Active Publication Date: 2020-06-12
NANJING IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that it has extremely high requirements on the device and the process is extremely cumbersome.

Method used

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  • Electromagnetic stirring method for high-carbon steel secondary cooling zone
  • Electromagnetic stirring method for high-carbon steel secondary cooling zone
  • Electromagnetic stirring method for high-carbon steel secondary cooling zone

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Embodiment 1

[0027] In order to make the present invention clearer, a kind of electromagnetic stirring method used in the high carbon steel secondary cooling zone of the present invention will be further described below in conjunction with the accompanying drawings. The specific embodiments described here are only used to explain the present invention and are not intended to limit this invention.

[0028] Such as figure 1 Shown, a kind of electromagnetic stirring method that is used for high carbon steel secondary cold zone, the device used comprises electromagnetic stirrer 1, and electromagnetic stirrer 1 comprises iron core 2 and the coil 3 that is wound outside it, and coil 3 is provided with The magnetic shielding ring 4 specifically includes the following steps:

[0029] (1) Install the electromagnetic stirrer 1: first wind the coil 3 on the iron core 2, and wind five windings, the lengths of the windings at both ends are equal, the lengths of the three windings in the middle are equ...

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Abstract

The invention discloses an electromagnetic stirring method for a high-carbon steel secondary cooling zone. The method includes the specific following steps of firstly, installing an electromagnetic stirrer and making the working face of the electromagnetic stirrer face the secondary cooling zone; secondly, exerting currents of the same frequency, the same intensity and the same phase sequence on all windings of the electromagnetic stirrer, and exciting a strong traveling wave magnetic field and making the magnetic field last for a period of time; thirdly, reducing the current value, exerting the currents of the same frequency, the same intensity and the same phase sequence on all the windings of the electromagnetic stirrer, exciting a weak traveling wave magnetic field in the same traveling direction as the strong traveling wave magnetic field, and making the magnetic field last for a period of time; and fourthly, executing the second step and the third step again until continuous casting ends. The method has the advantages that strong and weak alternate type stirring is adopted, the operating method is simple, the carbon segregation degree in a casting blank is remarkably reduced,and the white band phenomenon is reduced.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to an electromagnetic stirring method used in a secondary cooling zone of high-carbon steel. Background technique [0002] Generally, the device used in the process is an electromagnetic stirrer in the secondary cold zone, including an iron core, a winding, and a magnetic shielding ring; the coil is wound on the iron core, which is called a winding; the alternating current generates a magnetic field through the winding, and there is a magnetic field outside the winding. Shielding ring, the outer surface of the magnetic shielding ring is the non-working surface, and the surface not covered by the magnetic shielding ring is the working surface. A typical electromagnetic stirring process is a continuous operation mode. The details are as follows: under the same frequency and the same electromagnetic intensity, alternating currents with different initial phases are ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/115
CPCB22D11/115
Inventor 吴伟勤雷洪方磊张开顾宏刘天宇陈从俊
Owner NANJING IRON & STEEL CO LTD
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