Casting roll for twin roll strip caster

A technology of casting rolls and continuous casting machines, applied in casting equipment, casting melt containers, manufacturing tools, etc., can solve problems such as reduction in tensile strength and elongation

Inactive Publication Date: 2009-07-29
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dent 161 is a hemispherical depression with a diameter of 0.5-3 mm and a depth of 0.1-1 mm generated in the strip surface, which partially remains in the strip surface even after the rolling process; thus it is a surface defect , resulting in a disappointingly considerable reduction in tensile strength and elongation

Method used

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  • Casting roll for twin roll strip caster
  • Casting roll for twin roll strip caster
  • Casting roll for twin roll strip caster

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Embodiment Construction

[0045] The present invention will be specifically described below in conjunction with the accompanying drawings.

[0046] When casting TWIP steel into strip, casting rolls that have been surface treated by shot blasting (such as image 3 shown in ) and casting rolls using LBT-surface treated casting rolls (such as Figure 4 ) In both cases, indentations were produced in the surface layer of the strip. The dents are hemispherical depressions with a diameter of 0.5-3 mm and a depth of 0.1-1 mm generated in the surface layer of the strip, which have not been completely removed even by line hot rolling with a rolling reduction of 10-50%.

[0047] Depend on Figure 5 , it can be clearly seen that the indentation is produced by the depression in the surface layer of the casting roll.

[0048] Figure 5 (a) illustrates depressions formed in the surface layer of casting rolls by shot peening, and Figure 5 (b) illustrates dimples in the skin of a strip cast with a casting roll ha...

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Abstract

Disclosed is a casting roll for a twin roll strip caster, and particularly, a casting roll for a twin roll strip caster, in which a continuous gas channel, for preventing the generation of dents in the surface of a strip when casting TWIP steel in order to improve the mechanical properties of the strip, including increasing the tensile strength and elongation, is formed in the surface of the casting roll, thus discharging gas mixed when the strip is cast, thereby preventing the generation of dents in the surface of the strip when casting the TWIP steel, in particular, a continuous gas channelis formed, thereby decreasing a conventional dent index and discouraging the generation of dents.

Description

technical field [0001] The present invention relates to a casting roll for a twin-roll strip caster, and more particularly to such a casting roll for a twin-roll strip caster in which in order to avoid strip skin when casting TWIP steel Indentations are generated in the strip to improve the mechanical properties of the strip (including increased tensile strength and elongation), and continuous gas channels are formed on the surface of the casting roll to discharge the gas mixed in when casting the strip, thereby in Casting of TWIP steel avoids dent formation in the strip surface, in particular, creates continuous gas channels, thereby reducing the conventional dent index and hindering dent formation. Background technique [0002] In the conventional twin-roll strip casting process, such as figure 1 As shown in , molten steel 140 in a tundish 130 is supplied between two water-cooled casting rolls 110 that rotate in opposite directions; and an edge dam 150 is connected by a s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/06
CPCB22D11/0622B22D11/0651B22D41/50B22D11/066
Inventor 河万琎郑成仁崔周台金完洙姜泰旭权五德
Owner POHANG IRON & STEEL CO LTD
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