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

Abstract

The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Mn-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 4-20wt% Mg, 1-15wt% Ca, C less than 0.02wt%, Si less than 1.0wt%, P less than 0.02wt%, S less than 0.02, 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-Mn-Ca-Fe alloy for steelmaking. Background technique [0002] At present, Al-Mn-Fe alloy is used for final deoxidation of steelmaking, because it has good deoxidation effect, the alloy has a large proportion, and is easy to sink in molten steel. It can realize the alloying advantages of manganese while deoxidizing, so Al-Mn-Ferro has always been a popular choice for people for a long time. Common steelmaking deoxidizer. However, this alloy deoxidizer also has disadvantages, mainly its deoxidation product Al 2 o 3 The inclusions formed in the steel are in the form of strips, and their non-plasticity leads to a decrease in the impact toughness and elongation of the steel. At the same time, since Al 2 o 3 The melting point is high, and it is easy to condense in molten steel casting an...

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-Mn-Ca-Fe alloy of micro-low carbon, low silicon, low phosphorus, low sulfur that steelmaking is used, solve the final deoxidation effect that exists in the prior art. 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.