Al-Ca-Fe alloy contg. trace carbon, low slilicon, low phosphorus, low sulphur used for steelmaking

Abstract

The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 1-20wt% Ca, C less than 0.02wt%, Si less than 1.0wt%, P less than 0.02wt%, S less than 0.02wt%, the rest is Fe. It is smelted from line frequency furnace. The invention has the advantage of easy to use, stable, and could improve the recovery factor of the metal element. The molten steel treated by the deoxidizer has good fluidity, high work rates, high benefits, etc. The deoxidizer could discharge the impurity, and it has good mechanical behavior, good quality, long useful life and good social benefit.

Description

technical field [0001] The invention relates to an iron alloy for steelmaking in the field of metallurgy, in particular to a slightly low-carbon, low-silicon, low-phosphorus and low-sulfur Al-Ca-Fe alloy for steelmaking. Background technique [0002] The rapid development of all walks of life requires the quality of steel to be better and better, and the service life to be longer. Relatively speaking, it is required that the final deoxidizer used in steelmaking must meet the needs of steelmaking, and develop in the direction of micro-low carbon, low silicon, low phosphorus, and low sulfur. [0003] In the past, ferromanganese was used for smelting boiling steel, and finally Al ingot was used for final deoxidation. Ferrosilicon, ferromanganese, and silicomanganese were used for smelting killed steel, and Al ingot was used for final deoxidation. Due to the light specific gravity of aluminum, low melting point, and easy burning loss, the yield of aluminum deoxidation is low, w...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned deficiencies, the purpose of the present invention is to provide a kind of Al-Ca-Fe alloy with low carbon, low silicon, low phosphorus and low sulfur for steelmaking, so as to solve the problem of poor final deoxidation effect existing in the prior art. Problem, as a final deoxidizer for steelmaking, it does not need to refine the steel, improves the quality of the steel, and reduces the cost. It is suitable for smelting steel types that require Als and low C, low P, and low S.