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Method for producing composite steel plate by strip continuous casting and tandem rolling

A technology of continuous casting, continuous rolling, and clad steel plates, which is applied in metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of immature technology, difficult to flexibly control stainless steel and carbon steel, etc., and achieve high production efficiency. , good deformation ability, strong controllable effect

Active Publication Date: 2010-03-31
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of electromagnetic control technology to prevent the mixing of two liquid metals, it is difficult to flexibly control the composition of stainless steel and carbon steel, and the technology is not very mature, which needs further research

Method used

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  • Method for producing composite steel plate by strip continuous casting and tandem rolling

Examples

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Effect test

Embodiment 1

[0043] Heat a 2mm thick carbon steel plate to 1400°C in an inert gas shielded furnace and keep it warm for 5 minutes. The 304 stainless steel particle jet is introduced, the particle jet velocity is 650m / s, the average particle size is 65 microns, the maximum particle size is 100 microns, and the temperature is 550°C. A 200 micron stainless steel layer was formed on both surfaces. The carrying protective gas temperature is nitrogen at 650°C. Cool down to 950°C with the furnace, and roll down 20% in a single pass. 200°C insulation. The actual thickness of the obtained composite steel plate is 1.9mm, and the surface composition is 304 stainless steel.

Embodiment 2

[0045] Heat the 5mm thick IF steel plate in an inert gas shielded furnace to 1100°C and keep it warm for 15min. The 410 stainless steel particle jet is introduced, the particle jet velocity is 710m / s, the average particle size is 55 microns, the maximum particle size is 75 microns, and the temperature is 650°C. A stainless steel layer with a thickness of about 500 microns on each of the double surfaces is formed. The carrying protective gas temperature is nitrogen at 800°C. Cool down to 1000°C with the furnace, and roll down 30% in a single pass. 450°C heat preservation. The actual thickness of the obtained composite steel plate is 4.5 mm, the surface composition is 410 stainless steel, and the nickel content is reduced to a certain extent.

Embodiment 3

[0047] Heat a 3mm thick carbon steel plate to 1250°C in an inert gas shielded furnace and keep it warm for 10 minutes. The 2507 duplex stainless steel particle jet is introduced, the particle jet velocity is 680m / s, the average particle size is 45 microns, the maximum particle size is 80 microns, and the temperature is 600°C. A stainless steel layer with a thickness of about 400 microns on each of the double surfaces is formed. The carrying protective gas temperature is nitrogen at 800°C. Cool down to 890°C with the furnace, and roll down 15% in a single pass. Direct water quenching. The actual thickness of the obtained composite steel plate is 3.5mm, and the surface composition is 2507 stainless steel, which contains a certain amount of martensite structure.

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Abstract

The invention discloses a method for producing composite steel plate by strip continuous casting and tandem rolling. Liquid carbon molten steel forms a thin steel band by twin-roll strip continuous casting; after the thin steel band leaves a casting roll contact point, high-temperature stainless steel particles are jetted on the surface of the thin steel band, the stainless steel particles are spliced to form a stainless steel surface layer, and particle temperature is 550-650 DEG C; hot rolling is performed to form a composite steel plate with the carbon steel being in the core and stainlesssteel being on the surface. The composite steel plate of the invention has the characteristics of favourable surface corrosion resistance, high core strength, favourable comprehensive performance andthe like.

Description

technical field [0001] The invention relates to a composite steel plate manufacturing technology, in particular to a thin-strip continuous casting and rolling method for producing a composite steel plate. Background technique [0002] With the continuous improvement of steel manufacturing technology, a large number of steel materials with different compositions and organizations have emerged. These steel materials include carbon steel, stainless steel, silicon steel and various alloy steels. The most widely used steel materials are carbon steel and stainless steel. Carbon steel has become one of the most important materials in the field of structural materials due to its excellent mechanical properties, but an obvious disadvantage of carbon steel materials is low corrosion resistance. It is not suitable for use in a corrosive environment. The annual consumption of carbon steel due to corrosion has gradually accounted for 10% of the total annual steel output, and it is stil...

Claims

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Application Information

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IPC IPC(8): B21B1/46B22D11/16B21B37/74B21B37/00B21B45/02
Inventor 方园徐乐江张俊宝梁永立
Owner BAOSHAN IRON & STEEL CO LTD
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