Method of Treating Cast Iron with Rare Earth
A technology of rare earth ferrosilicon magnesium and cast iron, which is applied in the field of metallurgy, can solve the problems such as the effect of rare earth treatment on cast iron, achieve good effect, round graphite balls, and reduce black slag
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Embodiment 1
[0040] Example 1 uses rare earth to treat rare earth gray cast iron. The chemical composition of molten iron is shown in Table 1. Melting 500kg of molten iron in an iron mold, the temperature of the molten iron is 1450°C.
[0041] The chemical composition (wt%) of the molten iron of table 1 embodiment 1
[0042]
[0043] The rare earth ferrosilicon alloy with a particle size of 10 μm was preheated at 550°C, and the amount added was 1.3% of the total mass of molten iron. Rare earth ferrosilicon alloy composition mass percentage is: RE20%, Si46%, Mn8%, the rest is Fe. When tapping, the preheated rare earth ferrosilicon alloy is evenly sprinkled on the molten iron flow in the tapping chute. The molten iron flow flushes the rare earth ferrosilicon alloy into the ladle. After the molten iron is discharged, stir the rare earth ferrosilicon alloy and molten iron in the molten iron ladle to accelerate the melting of the rare earth ferrosilicon alloy so as to be absorbed by the ...
Embodiment 2
[0045] Example 2 uses rare earth to treat rare earth gray cast iron. The chemical composition of molten iron is shown in Table 2. Melting 500kg of molten iron in an iron mold, the temperature of the molten iron is 1420°C.
[0046] The chemical composition (wt%) of the molten iron of table 2 embodiment 2
[0047]
[0048] The rare earth ferrosilicon alloy with a particle size of 25 μm was preheated at 600°C, and the amount added was 0.06% of the total mass of molten iron. Rare earth ferrosilicon alloy composition mass percentage is: RE20%, Si46%, Mn8%, the rest is Fe. When tapping, the preheated rare earth ferrosilicon alloy is evenly sprinkled on the molten iron flow in the tapping chute. The molten iron flow flushes the rare earth ferrosilicon alloy into the ladle. After the molten iron is discharged, stir the rare earth ferrosilicon alloy and molten iron in the molten iron ladle to accelerate the melting of the rare earth ferrosilicon alloy so as to be absorbed by the...
Embodiment 3
[0050] Example 3 uses rare earth to treat rare earth gray cast iron. The chemical composition of molten iron is shown in Table 3. Melting 500kg of molten iron in an iron mold, the temperature of the molten iron is 1500°C.
[0051] The chemical composition (wt%) of the molten iron of table 3 embodiment 3
[0052]
[0053] The rare earth ferrosilicon alloy with a particle size of 17 μm was preheated at 400°C, and the amount added was 2.0% of the total mass of molten iron. Rare earth ferrosilicon alloy composition mass percentage is: RE20%, Si46%, Mn8%, the rest is Fe. When tapping, the preheated rare earth ferrosilicon alloy is evenly sprinkled on the molten iron flow in the tapping chute. The molten iron flow flushes the rare earth ferrosilicon alloy into the ladle. After the molten iron is discharged, stir the rare earth ferrosilicon alloy and molten iron in the molten iron ladle to accelerate the melting of the rare earth ferrosilicon alloy so as to be absorbed by the ...
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Abstract
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