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Big square billet heavy rail steel functional protective material

A technology for protecting materials and heavy rail steel, which is applied in the field of metallurgical auxiliary materials and can solve problems such as internal cracks

Active Publication Date: 2012-06-06
HENAN XIBAO METALLURGICAL MATERIALS GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the cooling strength of crystal water is too high, internal cracks will easily appear

Method used

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  • Big square billet heavy rail steel functional protective material
  • Big square billet heavy rail steel functional protective material
  • Big square billet heavy rail steel functional protective material

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0015] A protective material for continuous casting of heavy rail steel, in which SiO 2 The mass percentage content is 32.0%, Al 2 o 3 The mass percentage of CaO is 4.0%, the mass percentage of CaO is 24%, F - The mass percentage content is 6%, R 2 The mass percentage content of O is 11%, and the mass percentage content of C is 4.5%.

[0016] The continuous casting protective material has a melting point of 950° C., a viscosity of 0.160 Pa·S, and an R value of 0.75.

[0017] Since Angang heavy rail steel bloom continuous casting adopts multi-point straightening full-arc continuous casting machine, the crystallizer equipment has liquid level control system and electromagnetic stirring system. After the molten steel is vacuum refined, the content of inclusions in the molten steel is low, so the continuous casting protective material must be melted evenly, so as to avoid uneven melting of the continuous casting protective material and slag entrainment under the unreasonable m...

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Abstract

The invention discloses a big square billet heavy rail steel continuous casting protective material which comprises the components by mass percent: 32.0% of SiO2, 4.0% of Al2O3, 24% of CaO, 6% of F<->, 11% of R2O and 4.5% of C. Ansteel heavy rail steel has poorer high temperature plasticity, higher frictional resistance is applied on a blank shell in a crystallizer when in the casting process, and the blank shell is easy to stick with the wall of the crystallizer, so that the continuous casting protective material is required to have good lubrication for casting blank. As a little chemical flux is added into the continuous casting protective material, the vitrifaction property of the continuous casting protective material can be improved, the lubrication capability thereof is enhanced, and the melt uniformity also can be improved.

Description

technical field [0001] The invention belongs to the technical field of metallurgical auxiliary materials, and in particular relates to a protective material for continuous casting of heavy rail steel with a bloom. Background technique [0002] Continuous casting and continuous casting protective materials have an important impact on the surface quality of continuous casting slabs, the service life of continuous casting molds and output. With the continuous deepening of people's understanding of continuous casting and continuous casting protection materials, they gradually realized that they have played an irreplaceable role. Due to the continuous improvement of steelmaking technology this year, the pace of steelmaking is fast, and the amount of steel tapping from the furnace has increased. Compared with steelmaking and subsequent steel rolling capabilities, continuous casting and continuous casting protective materials naturally occupy an important production link. From the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22D11/07
Inventor 李书成李伟锋
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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