Micro-carbon casting powder for high-carbon steel in square and rectangular billets and preparation method thereof

A medium-high carbon and mold flux technology, which is applied in the field of steelmaking and metallurgical auxiliary materials, can solve the problems of low content of premelt, carburization, and high content of carbonaceous materials, achieve good dispersion and isolation effects, and avoid uneven dispersion.

Active Publication Date: 2020-04-10
HENAN TONGYU METALLURGY MATERIALS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the content of premelt in the mold flux is low and the content of carbonaceous materials is high. For medium and high carbon steels, it is easy to cause local carburization.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0038] A kind of micro-carbon mold powder for high-carbon steel in square and rectangular billets, prepared from the following raw materials in parts by weight: 65 parts of 300-mesh special premelt, 8 parts of 300-mesh quartz, 2 parts of 300-mesh bentonite, and 300-mesh albite powder 6 parts, 2 parts of fluorite, 2 parts of soda ash, 3 parts of 300 mesh lithium carbonate, 2 parts of sodium nitrate, 3 parts of sodium fluoride, 1 part of 300 mesh medium carbon graphite, 1.5 parts of 300 mesh high carbon earthy graphite, 23nm grain 2 parts of superfine pigment carbon black, 1.5 parts of sodium carboxymethyl cellulose, 1.0 part of yellow dextrin, and 0.3 parts of calcium lignosulfonate.

[0039] The preparation method of the micro-carbon mold flux for the high-carbon steel in the square and rectangular billet includes the following steps:

[0040] (1) Preparation of special pre-melt material: extrude soda ash and limestone powder into 3-5mm balls according to the ratio of 1:1 to m...

Embodiment example 2

[0050] A micro-carbon mold powder for high-carbon steel in square and rectangular billets, prepared from the following raw materials in parts by weight: 52 parts of 300-mesh special premelt, 15 parts of 300-mesh wollastonite, 5 parts of 300-mesh quartz, and 300-mesh bentonite 4 parts, 2 parts of 300 mesh magnesia powder, 4 parts of 300 mesh albite powder, 4 parts of fluorite, 2 parts of soda ash, 2 parts of 300 mesh lithium carbonate, 4 parts of sodium nitrate, 1 part of sodium fluoride, 300 mesh of carbon 0.5 parts of graphite, 1 part of 300-mesh high-carbon earthy graphite, 1.5 parts of superfine pigment carbon black with a particle size of 25nm, 1.0 part of sodium carboxymethyl cellulose, 1.5 parts of yellow dextrin, and 0.3 part of calcium lignosulfonate.

[0051] The preparation method of the micro-carbon mold flux for the high-carbon steel in the square and rectangular billet includes the following steps:

[0052] (1) Preparation of special premelt: extrude soda ash and ...

Embodiment example 3

[0060] A kind of micro-carbon mold powder for high-carbon steel in square and rectangular billets, prepared from the following raw materials in parts by weight: 40 parts of 300-mesh special premelt, 30 parts of 300-mesh wollastonite, 5 parts of 300-mesh fluorite, 300-mesh 2 parts of bentonite, 3 parts of 300 mesh albite powder, 3 parts of 300 mesh quartz, 1 part of soda ash, 3 parts of magnesia powder, 1 part of 300 mesh lithium carbonate, 6 parts of sodium nitrate, 2 parts of sodium fluoride, 23nm particle size super 2 parts of fine pigment carbon black, 0.5 part of sodium carboxymethyl cellulose, 2.0 parts of yellow dextrin, 0.3 part of calcium lignosulfonate.

[0061] The preparation method of the micro-carbon mold flux for the high-carbon steel in the square and rectangular billet includes the following steps:

[0062] (1) Preparation of special premelt: extrude soda ash and limestone powder into 3-5mm balls according to the ratio of 1:1 to make a two-in-one ball; mix 10 p...

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Abstract

The invention discloses micro-carbon casting powder for high-carbon steel in square and rectangular billets and a preparation method of the micro-carbon casting powder, and belongs to the technical field of steelmaking metallurgical auxiliary materials. The invention discloses micro-carbon casting powder for the high-carbon steel in the square and rectangular billets is prepared from following rawmaterials in cluding, 40-65 parts of a special pre-melting material, 0-30 parts of wollastonite, 3-8 parts of quartz, 1-5 parts of bentonite, 0-3 parts of magnesia, 2-7 parts of albite, 2-6 parts offluorite, 1-4 parts of sodium carbonate, 1-4 parts of sodium fluoride, 1-3 parts of lithium carbonate, 2-6 parts of sodium nitrate, 0-1.5 parts of medium-carbon graphite, 0-1.5 parts of high-carbon amorphous graphite, 1-2.5 parts of superfine color black and 1.8-3.8 parts of a binding agent. The casting powder is low in carbon content, high in pre-melting ratio, not prone to generating a slag ring, capable of generating heat automatically and capable of being applied to the high carbon steel in special steel in the square and rectangular billets, capable of avoiding local recarburization of the high carbon steel in the special steel, meanwhile, low in fluorine content and capable of avoiding erosion to nozzle slag lines.

Description

technical field [0001] The invention belongs to the technical field of steelmaking and metallurgical auxiliary materials, and in particular relates to a micro-carbon mold slag for high-carbon steel in square and rectangular billets and a preparation method thereof. Background technique [0002] Most of the medium and high carbon steels produced by square and rectangular billets belong to the category of special steels, which have special uses and high quality requirements. Therefore, there are also very high requirements for the mold slag of square and rectangular billets for medium and high carbon steels. [0003] Medium and high carbon steel (carbon content ≥ 0.30%) is not easy to have the problem of carburization due to its high carbon content, or the carburization is not obvious, but for special steel medium and high carbon steel, a little local carburization will affect the processed The quality of parts has a great influence. The source of carburization in the mold is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/111
CPCB22D11/111Y02P10/20
Inventor 陈守杰朱先狮杨利
Owner HENAN TONGYU METALLURGY MATERIALS GRP
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