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Method for continuously casting steel

A billet and thickness direction technology, applied in the field of continuous casting of steel, can solve the problems of toughness reduction, hydrogen-induced cracks, easy cracks, etc., and achieve the effect of excellent internal quality, reduced segregation and center porosity

Inactive Publication Date: 2017-06-06
QINGDAO XINHEYI IND & TRADE CO LTD
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AI Technical Summary

Problems solved by technology

[0003] Products obtained by hot-working these slabs with macro-segregation as raw materials tend to suffer from toughness reduction or hydrogen-induced cracking, etc., and when these products are cold-worked into final products, cracks are likely to occur

Method used

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Embodiment Construction

[0017] A method of continuous casting of steel, in which at least a pair of striking and vibrating devices are provided on both sides of the short side surface of the casting slab including the unsolidified part when casting a slab with a rectangular cross section, by continuously striking the above-mentioned The short side surface of the slab is cast while applying vibration to the above-mentioned slab, and by hitting the above short side surface, two castings on the long side surface of the above-mentioned slab defined by the following formulas (1) and (2) occur. The intersection point of the curve of the displacement δ(x) in the thickness direction of the billet and the straight line when the displacement δ(x)=0.10mm, adjust the vibration energy, the distance between the guide rollers and the unsolidified thickness to hit the short side surface, so that the above intersection point The distance between the point of intersection far from the origin and the strike position of ...

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Abstract

The invention provides a method for continuously casting steel. By means of the method, segregation-free center-porosity-free casting blanks with high internal quality can be efficiently obtained by striking the casting blanks under proper conditions so as to make the casting blanks vibrate. According to the method for continuously casting steel, at least one pair of striking and vibrating devices is arranged on the two sides of the short edge faces of a casting blank containing unset parts when the casting blank with a rectangular cross section is cast through the manufacturing method; while the casting blank is cast, vibration is applied to the casting blank by continuously striking the short edge faces of the casting blank; and by striking the short edge faces, a displacement delta (x) curve of the long edge faces of the casting blank in the thickness direction of the casting blank and intersection points of lines when the displacement delta (x) is equal to 0.10 mm, which are defined in the formula (1) and the formula (2) below, are generated, and the short edge faces are struck by adjusting the vibration energy, the distance between shafts of guide rollers and the unset thickness, so that the distance between the intersection point, away from the original point, of the intersection points and the struck positions of the short edge faces of the casting blank in the width direction of the casting blank is 200 mm or above.

Description

technical field [0001] The present invention relates to a continuous casting method for steel that is cast while striking the surface of a slab including an unsolidified portion and vibrating the slab. Background technique [0002] Internal defects such as macro-segregation (visual segregation: macro-segregation) called center segregation, V-shaped segregation, and inverted V-shaped segregation are likely to occur at and near the center in the thickness direction of the slab cast by continuous casting . Central segregation refers to internal defects that appear when solute components (hereinafter also referred to as "segregation components") that are easy to segregate, such as C, S, P, and Mn, condense in the final solidification part of the slab, V-shaped segregation and inverted V-shaped segregation. These are internal defects in which the above-mentioned segregation components are concentrated in a V-shape or an inverted V-shape near the final solidification part of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/16B22D11/12
CPCB22D11/16B22D11/12
Inventor 吴佳
Owner QINGDAO XINHEYI IND & TRADE CO LTD
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