Aluminum-magnesium-iron alloy deoxidant

Abstract

An AlMgFe alloy deoxidant contains Al (40-95 wt.%), Mg (5-20) and Fe (rest). Its advantages are direct application in molten steel, high desulfurizing power and low cost.

Description

technical field [0001] The invention relates to a deoxidizer for steelmaking deoxidation, in particular to an aluminum-magnesium-iron alloy deoxidizer for steelmaking deoxidation, which is a supplement to existing ferroalloy varieties and belongs to the technical field of steelmaking. Background technique [0002] As a deoxidizer for steelmaking, 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, nearly 70-90% of aluminum is oxidized. Therefore, the residual aluminum in the steel is both low and unstable. [0003] Magnesium is also a deoxidizer, especially the best raw material for molten steel desulfurization. However, since ma...

AI Technical Summary

Problems solved by technology

However, since magnesium has a high vapor pressure, it is very easy to vaporize and burn, so it is difficult to directly use it for deoxidation and desulfurization in steelmaking.

[0004] Aluminum and magnesium are the most ideal deoxidation and desulfurization agents for steelmaking. Especially when aluminum and magnesium are used together, they have obvious synergistic effects, so that they have good deoxidation and desulfurization effects. In order to be fully utilized in steelmaking production, Aluminum and magnesium plus iron are made into alloys. The currently published Chinese invention patent application No. 01109847.3 provides an aluminum-magnesium-iron alloy for steelmaking deoxidation and desulfurization, but its chemical composition includes Al, Mg, and Fe , also contains one or several elements in Si, Ba, Sr, Ca, Mn, which not only increases the cost of the alloy, but also increases the difficulty of the normal production of this alloy

In addition, the Mg content in the alloy is too high, which also increases the difficulty in the production of the alloy.