Al-Mg-Fe alloy contg. trace carbo, 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-Mg-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 1-20wt% Mg, 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-Mg-Fe alloy for steelmaking. Background technique [0002] Some steel mills produce many types of low-carbon, low-silicon, low-phosphorus, and low-sulfur steel, but due to poor quality of raw materials, especially the fluctuations in the composition of molten steel for steelmaking are too large, especially the high P and S of molten steel. The composition control of steelmaking brings great difficulties and problems, and the refining rate of steel grades is low. Sometimes the steel is smelted, but adding a deoxidizer for deoxidation alloying often results in unqualified steel types C, Si, P, and S, which are caused by unqualified components of the deoxidizer, especially C, Si, P, and S. Not in small quantities. [0003] Aluminum has a great affinity for oxygen. As a deoxidizer for ste...

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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-Mg-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.