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

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 ...

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