Al-Mn-Ca-Fe alloy contg. trace carbon, low silicon, low phosphorus, low sulphur used for steelmaking
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A low-carbon, low-silicon, and alloy technology, applied in the field of ferroalloys for steelmaking in the metallurgical field, can solve problems such as poor final deoxidation effect, achieve the effects of changing the shape of inclusions, reducing costs, and increasing corporate benefits
Active Publication Date: 2006-09-13
本溪铸新冶炼有限公司
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[0004] For above-mentioned deficiencies, the object of the present invention is to provide a kind of Al-Mn-Ca-Fe alloy of micro-low carbon, low silicon, low phosphorus, low sulfur that steelmaking is used, solve the final deoxidation effect that exists in the prior art. 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
[0026] Embodiment 1 (percentage by weight)
[0027] Al 50, Mn 4, Ca 4, C 0.018, Si 0.8, P 0.017, S 0.016, Fe balance.
[0028] Use the above alloys as the final deoxidizer for 15F steel, and add the alloys: Mn-Fe, Si-Fe, Si-Mn when the molten steel reaches 1 / 4 of the large tank. The order of addition is weak, medium and strong, and finally add the final deoxidizer Al-Mg-Ca-Fe alloy, must be added when the molten steel reaches 3 / 4 of the large tank. This deoxidizer has a large specificity, a good deoxidation degree, a high yield of various elements, and a good steel refining rate.
[0029] C (wt%)
[0030] grain size
Embodiment 2
[0032] Difference with embodiment 1 is: (percentage by weight)
[0033] Al 55, Mn 6, Ca 5, C 0.017, Si 0.9, P 0.019, S 0.018, Fe balance.
Embodiment 3
[0035] Difference with embodiment 1 is: (percentage by weight)
[0036] Al 60, Mn 8, Ca 7, C 0.018, Si 0.7, P 0.012, S 0.016, Fe balance.
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Abstract
The invention relates to a micro low carbon, low silicon, low phosphor, and low sulfur Al-Mn-Ca-Fe alloy used in steel-making. It uses as deoxidizer and contains 20-85wt% Al, 4-20wt% Mg, 1-15wt% Ca, C less than 0.02wt%, Si less than 1.0wt%, P less than 0.02wt%, S less than 0.02, 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-Mn-Ca-Fe alloy for steelmaking. Background technique [0002] At present, Al-Mn-Fe alloy is used for final deoxidation of steelmaking, because it has good deoxidation effect, the alloy has a large proportion, and is easy to sink in molten steel. It can realize the alloying advantages of manganese while deoxidizing, so Al-Mn-Ferro has always been a popular choice for people for a long time. Common steelmaking deoxidizer. However, this alloy deoxidizer also has disadvantages, mainly its deoxidation product Al 2 o 3 The inclusions formed in the steel are in the form of strips, and their non-plasticity leads to a decrease in the impact toughness and elongation of the steel. At the same time, since Al 2 o 3 The melting point is high, and it is easy to condense in molten steel casting an...
Claims
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