Complex ferroalloy of aluminum, nickel, copper with lower carbon and silicon in use for final steelmaking deoxidizer

A low-carbon, low-silicon, final deoxidizer technology, applied in the field of steel-making final deoxidizer low-carbon, low-silicon, aluminum-nickel-copper composite iron alloy, and ferroalloy for steelmaking, can solve the problem of poor final deoxidation effect and shorten the smelting time , Simplify process operation, reduce trouble and time effect

Inactive Publication Date: 2007-10-10
李兴有
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a low-carbon, low-silicon, aluminum-nickel-copper composite iron alloy used as a final deoxidizer for steelmaking to solve the problem of poor final deoxidation effect in low-alloy steels and alloy steels containing Ni and Cu content. Als content is required in low-carbon and low-silicon steels, and low-alloy steels and alloy steels containing Ni and Cu are required in the steel

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] By weight percentage, the chemical composition is as follows:

[0027] C 0.11; Si 0.48; S 0.019; Al 5; Ni 25; Cu 25; Fe balance.

[0028] Use the above alloy as the final deoxidizer for 907A steel, tap the steel into the large tank, start adding it at 1 / 4, and finish adding when the molten steel is 3 / 4 of the large tank, use slag blocking to tap, the steel product is large , It needs to be replaced and repaired to reduce the flow of steel slag into the large tank, lay a good foundation for post-furnace refining, and the use effect is good.

[0029] C

Embodiment 2

[0031] By weight percentage, the chemical composition is as follows:

[0032] C 0.17; Si 0.61; S 0.016; Al 10; Ni 15; Cu 15; Fe balance.

Embodiment 3

[0034] By weight percentage, the chemical composition is as follows:

[0035] C 0.13; Si 0.71; S 0.012; Al 15; Ni 20; Cu 26; Fe balance.

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Abstract

This invention relates to a final deoxidizer for steelmaking, which is low-C and low-Si Al-Ni-Cu alloy. The alloy comprises: C less than or equal to 0.3 wt.%, Si less than or equal to 1 wt.%, S less than or equal to 0.03 wt.%, Al 5-40 wt.%, Ni 15-65 wt.%, Cu 15-65 wt.%, and Fe as balance. The alloy has such advantages as low melting point, high specific gravity, no pulverization, no impurities, easy operation, good deoxidation effect, high Ni and Cu yields (100%), and high steel qualification rate. The alloy is added into molten steel after discharge from furnace, thus can prevent steel quality deterioration. Besides, adding the alloy after discharge from furnace does not influence normal production time, and is good to furnace body.

Description

technical field [0001] The invention relates to an iron alloy for steelmaking in the field of metallurgy, in particular to a low-carbon, low-silicon, aluminum-nickel-copper composite iron alloy used as a final deoxidizer for steelmaking. Background technique [0002] With the rapid development of all walks of life in our country, there are many types of steel products in demand, and the quality is even better. The market competitiveness of the steel industry is very strong, which brings with it the final deoxidizer for steelmaking, which requires deep deoxidation and at the same time meets some The steel composition requirements for alloying elements are relatively difficult. [0003] Calcium-silicon and silicon-aluminum-iron alloys are used as final deoxidizers for steelmaking, and their effects have been recognized. The composite deoxidizers for steelmaking that have appeared in recent years generally contain silicon. However, when smelting steels with good toughness are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C22C38/16C22C19/00C22C9/00C22C30/00
Inventor 李兴有
Owner 李兴有
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