Fire-resistant and weather-resistant steel plate/strip and production method thereof

A technology of fire resistance and weather resistance and production method, which is applied in heat treatment equipment, manufacturing tools, heat treatment process control, etc., and can solve problems that do not involve fire resistance.

Active Publication Date: 2021-03-19
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] The above-mentioned patents all involve the weather resistance of steel, but none of the contents involve the effect of fire resistance

Method used

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  • Fire-resistant and weather-resistant steel plate/strip and production method thereof
  • Fire-resistant and weather-resistant steel plate/strip and production method thereof
  • Fire-resistant and weather-resistant steel plate/strip and production method thereof

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Embodiment Construction

[0088] The present invention will be further illustrated below with examples, but these examples are by no means any limitation to the present invention. Any changes made by those skilled in the art in the implementation of the present invention under the inspiration of this specification will fall within the protection scope of the claims of the present invention.

[0089] Such as figure 1 As shown, the molten steel in the ladle 1 is poured directly on a crystallization roller 8a, 8b and In the molten pool 7 surrounded by the side sealing devices 6a and 6b, molten steel solidifies on the circumferential surface where the crystallization rollers 8a and 8b rotate, forming a solidification shell and gradually growing, and then forming a solidification shell and gradually growing at the position where the gap between the two crystallization rollers is the smallest (nip point) A steel strip 11 with a thickness of 1.5-3 mm is formed.

[0090] see figure 1, the production method ...

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Abstract

The invention discloses a fire-resistant and weather-resistant steel plate/strip and a production method thereof. The fire-resistant and weather-resistant steel plate/strip comprises, by weight, 0.02-0.06% of C, 0.1-0.55% of Si, 0.4-1.7% of Mn, less than or equal to 0.03% of P, less than or equal to 0.007% of S, 0.30-0.80% of Cr, 0.10-0.60% of Cu, 0.20-0.60% of Mo, 0.004-0.010% of N, less than 0.001% of Als, 0.007-0.020% of total oxygen [O]T and the balance Fe and other inevitable impurities; and besides, the Mn/S ratio is greater than 250, and the Pcm is less than or equal to 0.27%. The produced fire-resistant and weather-resistant steel plate/strip can ensure that the steel can keep a high strength level at a high temperature, and also can reduce the mass of a building, improve the safety of the building and reduce the construction cost; and meanwhile, by utilizing the technological characteristics of thin-strip continuous casting, a fine grain layer with a certain thickness can be naturally formed on the strip steel surface on the basis of the fire resistance of the produced fire-resistant and weather-resistant steel plate/strip, and therefore the product has weather resistance.

Description

technical field [0001] The invention belongs to twin-roll thin strip continuous casting technology, in particular to a fire-resistant and weather-resistant steel plate / strip and a production method thereof. Background technique [0002] Most of the traditional thin strip steel is produced by multi-pass continuous rolling of the slab with a thickness of 70-200mm. The traditional hot rolling process is: continuous casting + slab reheating and heat preservation + rough rolling + finishing rolling + cooling + Coiling, that is, firstly obtain a cast slab with a thickness of about 200mm through continuous casting, reheat the cast slab and keep it warm, then perform rough rolling and finish rolling to obtain a steel strip with a thickness generally greater than 2mm, and finally process the steel strip Laminar cooling and coiling complete the whole hot rolling production process. If it is necessary to produce a steel strip with a thickness of less than 1.5mm (inclusive), it is rela...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38C22C38/22C22C38/20C22C38/06C22C38/04C22C38/02C22C33/04B22D11/06C21D8/02C21D11/00C21D1/74
CPCC22C38/38C22C38/22C22C38/20C22C38/06C22C38/04C22C38/02C22C38/002C22C38/001C22C33/04B22D11/0622B22D11/0682C21D8/0205C21D8/0226C21D11/005C21D1/74C21D2211/002C21D2211/005C21D2211/009
Inventor 吴建春秦波方园
Owner BAOSHAN IRON & STEEL CO LTD
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