Silicon-magnesium-calcium-strontium-barium-ferrum alloy

Abstract

A Si-Mg-Ca-Sr-Ba-Fe series alloy is characterized in that the alloy also comprises lanthanon cerium and has the following chemical compositions by weight percentage: 48-52% of silicon, 4-10 percent of magnesium, 10-12 percent of calcium, 1-3 percent of strontium, 8-12 percent of barium, 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, contributes to further improvement of steel quality. Meanwhile, 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 silicon-magnesium-calcium-strontium-barium-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, silicomanganese, aluminum and aluminum alloys. Ferroalloys containing silicon can only be used for final deoxidation of molten steel in calm steel, while deoxidation of molten steel in boiling steel is still made of aluminum. Aluminum cakes, aluminum strips and aluminum rings are used as deoxidizers. Aluminum is a strong deoxidizer, but the specific gravity of aluminum is relatively light and the yield is low, resulting in aluminum oxide with a high melting point, which is easy to cause nodulation at the nozzle, and the high price of aluminum increases the cost of steelmaking. Moreover, with aluminum and aluminum alloy deoxidation, the...

AI Technical Summary

Problems solved by technology

Aluminum is a strong deoxidizer, but the specific gravity of aluminum is relatively light and the yield is low, resulting in aluminum oxide with a high melting point, which is easy to cause nodulation at the nozzle, and the high price of aluminum increases the cost of steelmaking. Moreover, with aluminum and aluminum alloy deoxidation, the deoxidation products are not easy to be removed from the molten steel, which affects the quality of steel, especially for some steel types that require very low AL content, such as high-strength heavy rail steel