Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking

Abstract

The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Mg-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 5-20wt% Mg, 1-15wt% 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-Mg-Ca-Fe alloy for steelmaking. Background technique [0002] 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, it is used for smelting steels that require good toughness. When the silicon content in the steel is high, the toughness of the steel will be reduced. There are many low-carbon, low-silicon, low-phosphorus, and low-sulfur steels that are urgently needed in the market. The smelting rate of such steels is very low due to the influence of deoxidizers, and the company's profitability suffers a great loss. To smelt low-carbon, low-phosphorus, low-sulfur steel, the composition of the st...

AI Technical Summary

Problems solved by technology

[0004] For above-mentioned deficiencies, the object of the present invention is to provide a kind of Al-Mg-Ca-Fe alloy of micro-low-carbon, low-silicon, low-phosphorus, low-sulphur for steelmaking, solve the problem that the final deoxidation effect existing in the prior art is not enough Good question, 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.