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Rare earth silicon magnesium nitrogen alloy for steelmaking alloying and preparation method thereof

A steel-making alloying and rare earth silicon-magnesium technology, which is applied in the field of metallurgical charge, can solve the problems of high production cost and unstable steel quality, and achieve stable steel performance, uniform and stable composition, and good controllability

Pending Publication Date: 2022-08-02
本溪市宏业实业有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a rare-earth silicon-magnesium-nitrogen alloy for steel-making alloying, which can perform deep deoxidation and desulfurization on molten steel, and can effectively increase nitrogen and alloy the molten steel, reduce the cost on the premise of ensuring the performance of the steel, and solve the problem of Solved the problem of unstable steel quality and high production cost in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0023] The original 100-ton converter of a steel plant has a tapping capacity of 95-102 tons. The rare earth silicon-magnesium-nitrogen alloy of the present invention is used, and the target steel grade is HRB400. The raw material ratio and the use process are as follows:

[0024] The raw material components of the rare earth silicon magnesium nitrogen alloy include the following by weight percentage: 22% rare earth lanthanum, 10% rare earth silicon magnesium, 33.8% silicon nitride, 15.2% zirconium nitride, Ti 6 Al 4 V alloy 15%, additive 3%, the rest is Fe and other unavoidable impurity elements;

[0025] The elements in the rare earth lanthanum are: 99.2% lanthanum, and the rest are rare earth cerium and other unavoidable impurity elements;

[0026] The elements in rare earth silicon magnesium are: RE is 4.5% (Ce / RE is 43.5%), magnesium is 4.2%, calcium is 2.2%, silicon is 56.2%, nitrogen is 7.5%, and the rest are manganese and titanium and unavoidable other impurity eleme...

Embodiment 2

[0037] The original 210-ton converter in a steel plant has a tapping capacity of 205-220 tons. The rare earth silicon-magnesium-nitrogen alloy of the present invention is used, and the target steel grade is HRB500E.

[0038] The raw material ratio and preparation process are as follows:

[0039] The raw material components of the rare earth lanthanum-silicon-zirconium-magnesium-nitrogen alloy include the following by weight percentage: rare earth lanthanum 26%, rare earth silicon magnesium 12%, silicon nitride 30%, zirconium nitride 12.2%, Ti 6 Al 4 V alloy 15%, additive 4%, the rest is Fe and other unavoidable impurity elements;

[0040] The elements in the rare earth lanthanum are: 98.8% lanthanum, and the rest are rare earth cerium and other unavoidable impurity elements;

[0041] The elements in rare earth silicon magnesium are: RE is 4.8% (Ce / RE is 47.7%), magnesium is 4.6%, calcium is 1.2%, silicon is 53.4%, nitrogen is 7.4%, and the rest are manganese and titanium an...

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Abstract

The invention relates to the technical field of metallurgical furnace charge, and provides a rare earth silicon magnesium nitrogen alloy for steelmaking alloying, which comprises the following raw material components in percentage by weight: 15-35% of rare earth lanthanum, 10-25% of rare earth silicon magnesium, 30-40% of silicon nitride, 12-28% of zirconium nitride, 5-15% of Ti6Al4V alloy, 3-10% of additive and the balance of iron and other inevitable impurity elements. When the alloy is applied to steelmaking alloying, deep deoxidation and desulfurization can be performed on molten steel, nitrogen increasing and alloying can be effectively performed on the molten steel, the cost is reduced on the premise that the performance of the steel is guaranteed, and the problems that in the prior art, the quality of the steel is unstable, and the production cost is high are solved.

Description

technical field [0001] The invention relates to the technical field of metallurgical charge, in particular to a rare earth silicon-magnesium-nitrogen alloy for steelmaking alloying and a preparation method. Background technique [0002] In the process of steelmaking, rare earth has a good effect on deoxidation, desulfurization and purification of molten steel, and improves the performance of steel. Therefore, rare earths have been widely used in deoxidation alloying or inclusion control in steelmaking. However, since a part of phosphorus will be brought into the slag and alloy under the converter, the problem of phosphorus return will occur in the process of deoxidation and alloying, which will have a certain impact on the subsequent production. In addition, with the issuance of the new national rebar standard, many companies add a large amount of ferrovanadium nitride, vanadium-nitrogen alloy, ferroniobium, silicon manganese nitride, chromium nitride, nitrided ferrovanadiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C35/00C22C1/04B22F9/04B22F3/10B22F1/12B22F1/105C21C7/06
CPCC22C35/00C22C1/04B22F9/04B22F3/10C21C7/06Y02P10/20
Inventor 陈东
Owner 本溪市宏业实业有限责任公司
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