Aluminum -magnesium-ferrum multicomponent alloy steel melting deoxidizing agent

Abstract

An Al-Mg-Fe series complex alloy deoxidizing agent for steel making is characterized in that the deoxidizing agent also comprises lanthanon cerium and has the following chemical compositions by weight percentage: 30-35 percent of aluminum, 10-15 percent of magnesium, 1-5 percent of silicon, 5-10 percent of calcium, 5-10 percent of strontium, 0.1-2percent of cerium, and the balance of Fe. The deoxidizing agent 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, 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 an Al-Mg-Fe series multi-element alloy steelmaking deoxidizer, which belongs to the technical field of steelmaking. Background technique [0002] The currently used steel-making deoxidizers are basically aluminum and aluminum alloys. Aluminum has a great affinity for oxygen and can refine grains to adjust the growth of austenite crystals, thereby improving the plasticity and toughness of steel. However, due to the light specific gravity, low melting point, and easy burning of aluminum, the yield of aluminum deoxidation is low, and the effective utilization rate is also low. Under the action of oxygen in the air and steel slag, 70-90% of aluminum is oxidized, so Residual aluminum in steel is both low and unstable. Magnesium is also a deoxidizer, especially the best raw material for molten steel desulfurization. However, since magnesium has a high vapor pressure, it is very easy to vaporize an...

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 High melting point, easy to condense and block the nozzle when pouring molten steel