Al-Mg-Ca-Fe alloy as composite deoxidant and its prepn

A composite deoxidizer, Al-Mg-Ca-Fe technology, applied in the field of deoxidizers to achieve the effects of eliminating splashing, improving overall performance, and high specific gravity

Inactive Publication Date: 2007-06-06
陈恩泽
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  • Abstract
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  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to overcome the deficiency of the above-mentioned single metal deoxidation, and to provide a new combination of existing various alloys such as aluminum magnesium iron, silicon calcium magnesium, silicon barium calcium aluminum, etc. A new composite deoxidizer produced by adding scrap steel to raw materials—aluminum-magnesium-calcium-iron alloy and its preparation method

Method used

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Embodiment 1

[0024] The chemical composition (weight %) of the alloy is: Si<0.50%, Al 42-46%, Ca 2.0-4.0%, Mg 2.0-4.0%, and the rest is Fe.

[0025] Its preparation method is:

[0026] a) take by weighing the raw materials of following proportioning (weight %):

[0027] 43-47% of industrial aluminum ingots containing 95-98% of aluminum, 3-5% of metal-packed magnesium containing 90-98% of magnesium, 3-6% of metal-packed calcium powder containing 75-90% of calcium, and 40% of scrap steel ~50%,

[0028] b) Put it into a power frequency furnace for melting, first put the scrap steel of the above ratio and 2 / 3 ratio of industrial aluminum ingot into the bottom of the furnace, heat and melt, add the calcium powder of metal packaging and the remaining industrial aluminum ingot after fully melting After stirring and melting, add metal magnesium in metal packaging, cast out of the furnace, and further break down to 20-50mm after cooling, that is, the chemical composition (weight %) is: Si<0.50%, ...

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Abstract

The present invention relates to steel making deoxidant technology, and is especially Al-Mg-Ca-Fe alloy as one kind of composite deoxidant and its preparation process. The Al-Mg-Ca-Fe alloy consists of Si 0-1 wt%, Al 20- 50 wt%, Mg 1-6 wt%, Ca 1-6 wt% and Fe and inevitable impurity for the rest. The preparation process includes the following steps: 1. weighing material including industrial aluminum ingot containing 95-98 wt% Al in 26-56 wt%, metal magnesium containing 90-98 wt% Mg in 2-10 wt%, calcium powder containing 75-90 wt% Ca in 2-10 wt%, and waste steel in 40-50 wt%; and 2. smelting with the said materials. The composite deoxidant is fine in crystal structure, hard, low in smelting point and great in specific weight, and may be used in smelting low alloy steel and carbon steel with O content lower than 25ppm, S content lower than 0.02 %, tensile strength of 50-80MPa and elongation at break of 5-10 %.

Description

technical field [0001] The invention relates to the technical field of deoxidizers for steelmaking, in particular to a novel composite deoxidizer-aluminum-magnesium-calcium-iron alloy and a preparation method thereof. Background technique [0002] Metal aluminum, as the preferred deoxidizing material for steelmaking, is still used today because it has a strong affinity for oxygen and cannot be completely replaced by other metals. However, aluminum has light specific gravity, low melting point, and is easy to be burned. Deoxidation with pure aluminum has low yield and effective utilization rate, especially after contact with oxygen in the air and steel slag, nearly 70-90% of the aluminum It is oxidized, therefore, the residual aluminum in the steel is low and unstable. [0003] Magnesium is also a deoxidizer and the best raw material for desulfurization of molten steel. But magnesium has a high vapor pressure and is easy to gasify and burn, so it is very difficult to direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/06C22C30/00C22C38/06C22C1/02C22C33/04
CPCY02P10/20
Inventor 陈恩泽
Owner 陈恩泽
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