Low silicon aluminum-iron alloy

Abstract

A low silicon Fe-Al series alloy is characterized in that the alloy has the following chemical compositions by weight percentage: 30-40 percent of aluminum, 5-10 percent of magnesium, 5-10 percent of calcium, 1-3 percent of strontium, 0.05-0.85 percent of silicon, 0.1-2 percent of cerium, and the balance of Fe. The alloy conducts deep deoxidation by using the activity of alkaline earth metallic elements, not only has better deoxidizing capacity, but also has stronger penetrating power on molten steel due to low melting point and large proportion, effectively removes gas and changes sonims, has refining function on molten steel, nodularization function on devulcanized inclusion and grain refinement function, and contributes to further improvement of steel quality. Simultaneously, lanthanon is added to promote crystalline structure degeneration of steel, thus increasing plastic nature and toughness of the steel.

Description

Technical field [0001] The invention relates to an alloy product, in particular to a low-silicon aluminum-iron alloy used as a deoxidizer for steelmaking, and belongs to the technical field of steelmaking. Background technique [0002] The currently used steelmaking deoxidizers are basically ferromanganese, ferrosilicon, silicon manganese, aluminum and aluminum alloys. Ferroalloys containing silicon can be used for final deoxidation of molten steel in killed steel. Aluminum and magnesium are the most ideal deoxidizers and desulfurizers for steelmaking. , especially when aluminum and magnesium are used together, they have an obvious synergistic effect, thus having a good deoxidation and desulfurization effect. Al-Mg-Fe alloys are used for final deoxidation of molten steel. Although a relatively complete degree of deoxidation can be obtained, there are also disadvantages: the deoxidation product AL in steel 2 o 3 The inclusions are in the form of strips, which have a great i...

AI Technical Summary

Problems solved by technology

Al-Mg-Fe alloys are used for final deoxidation of molten steel. Although a relatively complete degree of deoxidation can be obtained, there are also disadvantages: the deoxidation product AL in steel 2 o 3 The inclusions are in the form of strips, which have a great influence on the mechanical properties of the steel because of their non-plasticity; the deoxidized product AL 2 o 3 The melting point is high, and it is easy to condense and block the nozzle when the molten steel is poured, and the silicon content in the existing Al-Mg-Fe alloy is still high, which cannot meet the requirements for the final deoxidation of the low-silicon steel molten steel