A kind of cast iron material and its production process
A technology of iron castings and materials, which is applied in the field of iron casting materials and its production process, can solve the problems of affecting casting products, complicated process, increasing costs, etc., and achieve the effects of easy processing, stable crystal structure, and increased strength and hardness
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Embodiment 1
[0026] Embodiment 1: an iron casting material, including 65 parts by mass of returned material, 23 parts of scrap steel, and 15 parts of pig iron; the mass components of the iron casting material include: C: 2.9%, Si: 3.5%, Mn≤0.15%, P≤0.025%, S≤0.015%, Ti≤0.025%, the total content of other impurities≤0.02%, and the balance is Fe.
[0027] Pearlite and ferrite in the material of the iron casting account for 5% and 95% respectively.
[0028] Its production process comprises the following steps:
[0029] (a) Furnace charge selection: High-purity pig iron, low-Mn, low-P, low-S scrap steel and recycled materials are used as furnace materials; pig iron, recycled materials and scrap steel are added to the melting furnace in sequence.
[0030] (b) Smelting: The raw molten iron is smelted in an intermediate frequency induction furnace, and the furnace temperature is 1540°C;
[0031] (c) ZFCR-6 is selected as the nodulizer, the addition amount is 0.9%, and 75Si-Fe and Si-Ba are used as...
Embodiment 2
[0037] Embodiment 2: A kind of iron casting material, including 67 parts by mass of returned material, 25 parts of scrap steel, and 23 parts of pig iron; the quality components of the iron casting material include: C: 3.0%, Si: 3.7%, Mn≤0.10%, P≤0.015%, S≤0.005%, Ti≤0.005%, the total content of other impurities≤0.015%, and the balance is Fe.
[0038] Pearlite and ferrite in the cast iron material account for 7% and 93% respectively.
[0039] Its production process comprises the following steps:
[0040] (a) Furnace charge selection: High-purity pig iron, low-Mn, low-P, low-S scrap steel and recycled materials are used as furnace materials; pig iron, recycled materials and scrap steel are added to the melting furnace in sequence.
[0041] (b) Smelting: The raw molten iron is smelted in an intermediate frequency induction furnace, and the furnace temperature is 1546°C;
[0042] (c) ZFCR-6 is selected as the nodulizer, the addition amount is 0.93%, and 75Si-Fe and Si-Ba are sel...
Embodiment 3
[0048] Embodiment 3: A kind of iron casting material, including 60 parts by mass of returned materials, 20 parts of scrap steel, and 10 parts of pig iron; the mass components of the iron casting material include: C: 3.03%, Si: 3.78%, Mn≤0.10%, P≤0.015%, S≤0.005%, Ti≤0.005%, the total content of other impurities≤0.015%, and the balance is Fe.
[0049] Pearlite and ferrite in the cast iron material account for 6.5% and 93.5% respectively.
[0050] Its production process comprises the following steps:
[0051] (a) Furnace charge selection: High-purity pig iron, low-Mn, low-P, low-S scrap steel and recycled materials are used as furnace materials; pig iron, recycled materials and scrap steel are added to the melting furnace in sequence.
[0052] (b) Smelting: The raw molten iron is smelted in an intermediate frequency induction furnace, and the furnace temperature is 1543°C;
[0053] (c) ZFCR-6 is selected as the nodulizer, the addition amount is 0.99%, and 75Si-Fe and Si-Ba are...
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