Austenitic gas valve steel remelting mold flux and preparation method thereof

A technology of mold slag and valve steel, applied in the field of mold slag and its preparation, can solve the problems of adverse influence on the overall quality of mold slag, lack of raw material purification and pretreatment process, etc., and achieve stable arc start, good lubrication, and no arc start. The effect of cut-off

Active Publication Date: 2018-04-06
HENAN XIBAO METALLURGICAL MATERIALS GROUP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a lack of purification and pretreatment processes for raw materials in the prior art, which has an adverse effect on the overall quality of mold flux

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A remelting mold flux for austenitic valve steel, the mold flux includes the following mineral components and their weight percentages are: alumina powder 22%, calcium powder 18%, fused magnesium powder 1.0%, fluorite 57%, Barium carbonate 1%, bastnaesite 1%; among them, fluorite is de-SiO 2 Treated high-quality fluorite, de-SiO 2 The treatment is 1550°C, and the iron-aluminum electrode melts the fluorite for 3 hours, and the SiO in the fluorite 2 Reduction to generate SiAlFe to remove SiO 2 .

[0025] The mold flux includes the following chemical components and their weight percentages: CaF 2 59.0% 、 CaO 18.0%, Al 2 o 3 18.3%, SiO 2 0.4%, MgO 2.0%, BaO 1.0%, CeO 2 1.0%, the rest are impurities, of which, FeO 0.07%, C 0.030%, P 0.0008%, S 0.009%.

[0026] A method for preparing austenitic valve steel remelting mold slag, comprising the following steps: material preparation—weighing—stirring—electric furnace melting—stirring—out of the furnace—heat processin...

Embodiment 2

[0029] A remelting mold flux for austenitic valve steel, the mold flux includes the following mineral components and their weight percentages are: alumina powder 21%, calcium powder 22%, fused magnesium powder 0.8%, fluorite 56%, Barium carbonate 0.1%, bastnaesite 0.1%; among them, fluorite is de-SiO 2 Treated high-quality fluorite, de-SiO 2 The treatment is 1600°C iron-aluminum electrode to melt the fluorite for 2 hours, and the SiO in the fluorite 2 Reduction to generate SiAlFe to remove SiO 2 .

[0030] The mold flux includes the following chemical components and their weight percentages: CaF 2 55.5% 、 CaO 21.5%, Al 2 o 3 21.3%, SiO 2 0.6%, MgO 0.7%, BaO 0.1%, CeO 2 0.1%, the rest are impurities, of which, FeO 0.07%, C 0.016%, P 0.004%, S 0.01%.

[0031] The preparation method of the mold powder comprises the following steps: material preparation—weighing—stirring—electric furnace melting—stirring—out of the furnace—heat processing at 50° C.—crushing—aluminum f...

Embodiment 3

[0034] A remelting mold flux for austenitic valve steel, the mold flux includes the following mineral components and their weight percentages are: 20% alumina powder, 20% calcium powder, 1.82% fused magnesium powder, 57.5% fluorite, Titanium dioxide 0.18%, barium carbonate 0.25%, bastnaesite 0.25%; among them, fluorite is de-SiO 2 Treated high-quality fluorite, de-SiO 2 The treatment is 1600°C iron-aluminum electrode to melt the fluorite for 2.5 hours, and the SiO in the fluorite 2 Reduction to generate SiAlFe to remove SiO 2 .

[0035] The mold flux includes the following chemical components and their weight percentages: CaF 2 59.0% 、 CaO 19.0%, Al 2 o 3 20%, SiO 2 0.3%, MgO 1.0%, BaO 0.2%, CeO 2 0.2%, TiO 2 0.18%, the rest are impurities, of which FeO 0.02%, C 0.022%, P 0.0048%, S 0.019%.

[0036] A method for preparing austenitic gas valve steel remelting mold powder, comprising the following steps: material preparation—weighing—stirring—electric furnace melt...

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Abstract

The invention discloses remelted mold powder of austenite valve steel and a preparation method of the remelted mold powder. The mold powder comprises the following mineral components in percentage by weight: 18%-22% of alumina powder, 18%-22% of calcium powder, 0-2.0% of fused magnesite powder, 56%-60% of fluorite, 0.1%-2% of barium carbonate and 0.1%-2% of bastnaesite, wherein the fluorite is high-quality fluorite treated by removing SiO<2>. The mold powder disclosed by the invention is good in desulfurization effect and low in moisture content; the product is granular; dust pollution is avoided in field use; and the remelted mold powder has an environmental protection function.

Description

technical field [0001] The invention relates to a mold slag and a preparation method thereof, in particular to an austenitic valve steel remelting mold slag and a preparation method thereof. Background technique [0002] With the rapid development of cutting-edge technology in society, higher requirements are put forward for new functional materials and new structural materials, and electroslag remelting technology has also been developed and applied by leaps and bounds. Electroslag metallurgy technology is a compound technology of metal or alloy refining purification and solidification control. Its products have the characteristics of high purity, uniform composition, good mechanical properties and performance, near-final development, and controllable process. Therefore, it is used in many important The field is used to produce high-end products or key parts. Because electroslag remelting has the advantages of simple equipment, easy operation and low cost, except that the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B9/18
CPCC22B9/18
Inventor 李伟锋李书成张震
Owner HENAN XIBAO METALLURGICAL MATERIALS GROUP
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