Method for improving internal organization of casting blank of continuous casting machine and electromagnetic stirring device

An electromagnetic stirring and continuous casting machine technology, applied in the field of iron and steel metallurgy, can solve the problems of cracks on the surface of continuous casting slabs and the inability to reduce columnar crystals in a large amount, so as to eliminate shrinkage cavities and porosity, eliminate carbon and heavy metal segregation, and reduce columnar crystals. Effect

Inactive Publication Date: 2010-02-10
MCC CAPITAL ENGINEERING & RESEARCH
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Problems solved by technology

Moreover, the columnar crystals cannot be greatly reduced to form equiaxed crystals
In addition, due to strong cooling, surface cracks will occur on the surface of the continuous casting slab

Method used

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  • Method for improving internal organization of casting blank of continuous casting machine and electromagnetic stirring device
  • Method for improving internal organization of casting blank of continuous casting machine and electromagnetic stirring device
  • Method for improving internal organization of casting blank of continuous casting machine and electromagnetic stirring device

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0029] Such as Figure 3-Figure 5 As shown, the continuous casting slab of the continuous casting machine is generally divided into three areas during the production process, the liquid core L (ie, the liquid phase area), the solid-liquid phase area (or called the mushy area) M and the solid phase area S . The invention provides a method for improving the internal structure of the continuous casting slab of a continuous casting machine. The method is to carry out ...

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Abstract

The invention provides a method for improving the internal organization of a casting blank of a continuous casting machine and an electromagnetic stirring device, wherein the method is as follows: atthe tail end of a continuous casting bank liquid core on a secondary cooling zone of the continuous casting machine, carrying out electromagnetic stirring and generating forward and reverse alternantspiral rotating force which causes molten steel to rotate and flow along the casting direction of the continuous casting machine and appends static pressure to a solid-liquid phase zone of the tail end of the liquid core. The method and the electromagnetic stirring device of the invention can provide enough molten steel for supplying the volume contraction during the solidification of the liquid core and eliminating shrinkage cavity and loose, thus increasing the quality of the continuous blank.

Description

technical field [0001] The invention relates to an iron and steel metallurgy technology, specifically, a method for improving the internal structure of a continuous caster slab and an electromagnetic stirring device. Background technique [0002] Since the 1980s, the continuous casting machine production line has developed rapidly, and the quality requirements for continuous casting slabs are getting higher and higher, especially for special steel products. Under the forced cooling of the continuous casting slab in the secondary cooling section, the columnar crystals are particularly developed and grow from the outside to the center. In this way, the columnar crystals in the deep subcutaneous layer of the continuous casting slab increase and the equiaxed crystals are less, and the columnar crystals form a bridge. Billet quality is reduced. In addition, during the condensation process of the continuous casting slab, the volume shrinks, and the slab shell has been formed, so ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/115
Inventor 周德钢王军吴国庆
Owner MCC CAPITAL ENGINEERING & RESEARCH
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