Aluminium calcium ferro-silicon alloy

Abstract

The invention discloses an aluminium-calcium ferrosilicon alloy to refine steel, which comprises the following parts: 28-35% Al, 17-25% Ca, 14-17% Si and Fe.

Description

technical field [0001] The invention relates to an aluminum-calcium-silicon-iron alloy mainly used for deoxidation and desulfurization of refined steel. Background technique [0002] Calcium in the form of limestone is a kind of alkaline furnace charge mixed in the iron and steel smelting process. Treating molten steel with calcium is an important means of deoxidizing molten steel, and more importantly, desulfurization with calcium can also achieve significant results. Now, calcium has become a common additive to control the shape, size and distribution of oxide and sulfide inclusions in molten steel. Calcium-treated molten steel not only has good fluidity, but also effectively reduces the problems that may occur in continuous casting, such as poor nozzle or even blockage, and improves the cleanliness, machinability, ductility and impact resistance of the final product. [0003] Calcium has strong deoxidation ability, but the calcium vapor pressure is very high at steelmak...

AI Technical Summary

Problems solved by technology

[0006] However, due to the relatively low content of aluminum and calcium in the above-mentioned known aluminum-calcium-silicon-iron alloys, and the relatively high content of silicon, there is a relatively poor deoxidation ability and a relatively slow deoxidation speed in the known technologies. Deep deoxidation is not enough, especially because of its high silicon content, which affects the removal rate of oxidized inclusions, and is not suitable for refining deoxidation treatment of low silicon steel molten steel