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Continuous casting crystallizer covering slag for hot-working die steel slab and application of continuous casting crystallizer covering slag

The technology of continuous casting mold and hot work mold is applied in the field of steelmaking auxiliary materials, which can solve the problems of repair and scrap casting, and achieve the effects of improving thermal resistance, avoiding excessive heat transfer, and strengthening heat control effect.

Active Publication Date: 2021-04-27
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This type of steel is mainly produced by die casting. In recent years, with the rapid development of steelmaking and continuous casting technology and the continuous increase in the amount of this type of steel, continuous casting machines have only been used in the production of hot work die steel at home and abroad. It is produced by continuous casting, but there are a large number of problems of casting blanks being scrapped or repaired due to surface cracks, slag grooves, and scarring defects.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] This embodiment provides a continuous casting mold flux for hot-working die steel slabs. The raw materials include: 10.7 parts by weight of glass powder, 6 parts by weight of fluorite, 15 parts by weight of white alkali, The first carbon black of 2.8 parts by weight, the second carbon black of 5 parts by weight, the sodium fluosilicate of 7 parts by weight, the wollastonite of 35 parts by weight, the calcite of 6.5 parts by weight, the magnesia of 6 parts by weight, 3.5 parts by weight Parts of barium carbonate, 2 parts by weight of carboxymethyl cellulose and 0.5 parts by weight of calcium lignosulfonate.

[0081] Among them, the carbon content of the first carbon black is 98.2%, and the oil absorption value is 127g / cm 3 , the iodine absorption value is 142g / kg; the carbon content of the second carbon black is 99.2%, and the oil absorption value is 72g / cm 3 , The iodine absorption value is 82g / kg.

[0082] The chemical composition contained in the mold flux is as fol...

Embodiment 2

[0087] This embodiment provides a continuous casting mold flux for hot-working die steel slabs. The raw materials include: 4 parts by weight of glass powder, 8 parts by weight of fluorite, 18 parts by weight of white alkali, The first carbon black of 2.4 parts by weight, the second carbon black of 7.1 parts by weight, the sodium fluorosilicate of 8 parts by weight, the wollastonite of 39 parts by weight, the calcite of 3 parts by weight, the magnesia of 3 parts by weight, the magnesia of 5 parts by weight Parts of barium carbonate, 1.5 parts by weight of carboxymethyl cellulose and 1 part by weight of calcium lignosulfonate.

[0088] Among them, the carbon content of the first carbon black is 98.2%, and the oil absorption value is 127g / cm 3 , the iodine absorption value is 142g / kg; the carbon content of the second carbon black is 99.2%, and the oil absorption value is 72g / cm 3 , The iodine absorption value is 82g / kg.

[0089] The chemical composition contained in the mold fl...

Embodiment 3

[0094] This embodiment provides a continuous casting mold flux for hot-working die steel slabs. The raw materials include: 7 parts by weight of glass powder, 5 parts by weight of fluorite, 13 parts by weight of white alkali, The first carbon black of 4 parts by weight, the second carbon black of 4.5 parts by weight, the sodium fluorosilicate of 5 parts by weight, the wollastonite of 38.5 parts by weight, the calcite of 12.5 parts by weight, the magnesia of 4.5 parts by weight, the magnesia of 3.5 parts by weight Parts of barium carbonate, 1 part by weight of carboxymethyl cellulose and 1.5 parts by weight of calcium lignosulfonate.

[0095] Among them, the carbon content of the first carbon black is 98.2%, and the oil absorption value is 127g / cm 3 , the iodine absorption value is 142g / kg; the carbon content of the second carbon black is 99.2%, and the oil absorption value is 72g / cm 3 , The iodine absorption value is 82g / kg.

[0096] The chemical composition contained in the ...

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Abstract

The invention discloses continuous casting crystallizer casting powder for a hot-working die steel slab and application of the continuous casting crystallizer covering powder, and belongs to the technical field of steelmaking auxiliary materials. The covering slag comprises the following chemical components of, in percentage by weight, 22-27% of CaO, 25-30% of SiO2, 4-6% of MgO, 0.2-2% of Al2O3, 0.2-2% of Fe2O3, 12-15% of Na2O, 4-7% of F, 2.5-3.7% of BaO, 6.5-9.5% of C and the balance of inevitable impurities. The covering slag has the characteristics of small slag denaturation and stable and uniform slag consumption after absorbing heavy metal oxides in molten steel, so that the hot-working die steel has good lubrication and heat transfer effects in the throwing process, the surface quality of a casting slab is good, the accident risk of producing the hot-working die steel by continuous casting slabs can be remarkably reduced, and the production cost is reduced; and the covering slag is especially suitable for continuous casting production of hot-working die steel with the pulling rate of 0.7-2.0 m / min.

Description

technical field [0001] The invention relates to the technical field of steelmaking auxiliary materials, in particular to a mold slag for continuous casting molds for hot-working die steel slabs and its application. Background technique [0002] Hot work die steel includes hammer forging die, hot extrusion die and die-casting die. The basic performance requirements of hot die steel are high resistance to thermoplastic deformation, including high temperature hardness and high temperature strength, and high resistance to thermal plastic deformation. Therefore, it is usually It is to improve the high thermal plastic deformation resistance of steel by adding alloy elements such as Cr, Mn, Ni, Mo, V, W and so on. [0003] This type of steel is mainly produced by die casting. In recent years, with the rapid development of steelmaking and continuous casting technology and the continuous increase in the amount of this type of steel, continuous casting machines have only been used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111
Inventor 屈党军李晓阳徐金岩马晓娜王岩王希彬任义
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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