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Steel strip and method for casting steel strip

A technology for steel strips and casting rolls, which is used in the field of continuous casting of thin steel strips with a thickness of less than 5mm, and can solve problems such as not receiving attention.

Active Publication Date: 2009-12-30
NUCOR CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Controlling hydrogen and nitrogen levels has been investigated in the past in slab casting, but to the best of our knowledge has not received attention in the area of ​​strip casting

Method used

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  • Steel strip and method for casting steel strip
  • Steel strip and method for casting steel strip
  • Steel strip and method for casting steel strip

Examples

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Embodiment Construction

[0039] figure 1 and 2 A twin roll continuous belt caster operating in accordance with the invention is shown. The embodiments described below will be described in terms of continuous casting of steel strips using a twin roll caster. However, the invention is not limited to the use of twin roll casters, but extends to other types of continuous belt casters.

[0040] figure 1 Successive components of an exemplary production line on which steel strip may be produced according to the invention are shown. figure 1 and 2 There is shown a twin roll caster, generally indicated at 11 , producing cast steel strip 12 which travels along a conveyance path 10 , across a guide table 13 to a nip table 14 comprising nip rolls 14A. Immediately after leaving the nip table 14, the steel strip may enter a hot rolling mill 16 comprising a pair of thinning rolls 16A and backup rolls 16B, by which the steel strip is hot rolled to reduce its thickness. The rolled strip travels to run-out tab...

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Abstract

A method of casting steel strip by introducing molten plain carbon steel on casting surfaces at least one casting roll with the molten steel having a free nitrogen content below 120 ppm and a free hydrogen content below about 6.5 ppm measured at atmospheric pressure. The free nitrogen content maybe below about 100 ppm or below about 85 ppm. The free hydrogen content maybe between 1.0 and 6.5 ppm at atmospheric pressure. Novel cast strip of plain carbon steel is produced having a strip thickness less than 5 mm or less than 2 mm by use of the method.

Description

technical field [0001] This invention relates to cast steel strip. It is particularly suitable for continuous casting of thin steel strips with a thickness of less than 5mm in a roller casting machine. Background technique [0002] In a roll casting machine, molten metal is cooled on the casting surface of at least one casting roll and formed into a thin steel strip. In roll casting using a twin roll caster, molten metal is introduced between a pair of cooled, counter-rotating casting rolls. The steel shell solidifies on the moving casting surface and is rolled together in the nip between the casting rolls, resulting in a solidified sheet that is conveyed down the nip. The term "nip" is used herein to mean the total area where casting rolls are closest to each other. In any event, the molten metal is typically poured from a ladle into small containers from which it flows through a metal delivery system to distributed gates, typically located above the casting surfaces of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/06C22C38/00B22D11/00
CPCC22C38/04B22D11/001C22C38/02B22D11/0622B22D11/06
Inventor 拉马·B·马哈帕特拉尤金·B·普雷托里厄斯戴维·J·索辛斯基
Owner NUCOR CORP