Al-Mg-Ca-Fe alloy contg. micro-carbon, low silicon, low phosphorous, low-sulphur used for steelmaking
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A low-carbon, low-silicon and alloy technology, which is applied in the ferroalloy field for steelmaking in the metallurgical field, can solve problems such as poor final deoxidation effect, and achieve considerable social benefits, high continuous casting rate, and smooth casting
Active Publication Date: 2006-09-13
本溪冶炼集团有限公司
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[0004] For above-mentioned deficiencies, the object of the present invention is to provide a kind of Al-Mg-Ca-Fe alloy of micro-low-carbon, low-silicon, low-phosphorus, low-sulphur for steelmaking, solve the problem that the final deoxidation effect existing in the prior art is not enough Good question, as a final deoxidizer for steelmaking, it does not need to refine the steel, improves the quality of the steel, and reduces the cost. It is suitable for smelting steel types that require Als and low C, low P, and low S.
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Embodiment 1
[0025] Embodiment 1 (percentage by weight)
[0026] Al 50, Mg 15, Ca 15, C 0.017, Si 0.9, P 0.017, S 0.018, Fe balance.
[0027] Use the above alloy as the final deoxidizer for 09CuP steel, add alloys: Mn-Fe, Si-Fe, Si-Mn when the molten steel reaches 1 / 4 of the large tank, and finally add the final deoxidizer in the order of weak, medium, Strong, the final deoxidizer Al-Mg-Ca-Fe alloy is added at the end, and it must be added when the molten steel reaches 3 / 4 of the large tank. The slag must be kept out of the steel, and the steel mouth must be repaired to prevent pools from entering the large tank and affecting the deoxidation effect. This deoxidizer has a large specificity, good deoxidation effect, high operation rate, low cost and good steel quality.
[0028] C (wt%)
Si(wt%)
Mn(wt%)
P (wt%)
S (wt%)
Ca(wt%)
Fe(wt%)
Oxygen content in steel
1.0
0.31
0.45
0.08
0.021
0.30
margin
34.6ppm
...
Embodiment 2
[0033] Difference with embodiment 1 is: (percentage by weight)
[0034] Al 55, Mg 10, Ca 10, C 0.016, Si 0.8, P 0.015, S 0.019, Fe balance.
Embodiment 3
[0036] Difference with embodiment 1 is: (percentage by weight)
[0037] Al 58, Mg 5, Ca 5, C 0.017, Si 0.7, P 0.016, S 0.012, Fe balance.
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Abstract
The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Mg-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 5-20wt% Mg, 1-15wt% Ca, C less than 0.02wt%, Si less than 1.0wt%, P less than 0.02wt%, S less than 0.02wt%, the rest is Fe. It is smelted from line frequency furnace. The invention has the advantage of easy to use, stable, and could improve the recovery factor of the metal element. The molten steel treated by the deoxidizer has good fluidity, high work rates, high benefits, etc. The deoxidizer could discharge the impurity, and it has good mechanical behavior, good quality, long useful life and good social benefit.
Description
technical field [0001] The invention relates to an iron alloy for steelmaking in the field of metallurgy, in particular to a slightly low-carbon, low-silicon, low-phosphorus and low-sulfur Al-Mg-Ca-Fe alloy for steelmaking. Background technique [0002] Calcium-silicon and silicon-aluminum-iron alloys are used as final deoxidizers for steelmaking, and their effects have been recognized. The composite deoxidizers for steelmaking that have appeared in recent years generally contain silicon. However, it is used for smelting steels that require good toughness. When the silicon content in the steel is high, the toughness of the steel will be reduced. There are many low-carbon, low-silicon, low-phosphorus, and low-sulfur steels that are urgently needed in the market. The smelting rate of such steels is very low due to the influence of deoxidizers, and the company's profitability suffers a great loss. To smelt low-carbon, low-phosphorus, low-sulfur steel, the composition of the st...
Claims
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Application Information
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