Production method of spheroidal graphite cast iron for planet carrier
A nodular cast iron and production method technology, which is applied in the production field of nodular cast iron for planetary frames, can solve the problems of easy deformation of castings, poor mechanical properties of planetary frames, and high cost, and achieve the goals of improving purity, enhancing desulfurization effect, and increasing absorption rate Effect
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[0016] Example one
[0017] Using pig iron, recycle material, scrap steel, ferrosilicon, ferromanganese, electrolytic copper, antimony ingot as raw material ingredients, adopting cupola-electric furnace double smelting, adopting the spheroidizing method, the spheroidizing agent is rare earth magnesium ferrosilicon alloy, adding The amount is 0.85% of the total weight of the molten iron, and the flow rate of the molten iron into the spheroidizing bag is increased, so that the spheroidizing reaction is completed within 68s; the multiple inoculation technology is used, and the 75 ferrosilicon inoculant is used for inoculation during iron tapping. The particle size is 3-8mm, and the adding amount is 0.2-0.6% of the weight of the molten iron. Before pouring, the silicon-calcium-barium inoculant is used for inoculation. The particle size is 0.2-1mm, and the adding amount is 0.1% of the weight of the molten iron. The ferrosilicon inoculum was inoculated in the type, and the added amount...
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[0021] Example two
[0022] Using pig iron, recycle material, scrap steel, ferrosilicon, ferromanganese, electrolytic copper, antimony ingot as raw material ingredients, adopting cupola-electric furnace double smelting, adopting the spheroidizing method, the spheroidizing agent is rare earth magnesium ferrosilicon alloy, adding The amount is 0.90% of the total weight of the molten iron, and the flow rate of the molten iron into the spheroidizing bag is increased, so that the spheroidizing reaction is completed within 60s; using multiple inoculation technology, the number of inoculations is controlled at 4 times, including in-mold inoculation and Inoculated with the flow; finally produced iron liquid composed of the following weight percentages: C 3.58%, Si 2.09%, Mn 0.31%, P 0.028%, S 0.011%, Cu 0.73%, Sb 0.011%, Re 0.014%, Mg 0.041%, the balance is iron. The molten iron is allowed to stand at 1309°C, and the planet carrier casting body and standard test blocks and ultra-standar...
Example Embodiment
[0026] Example three
[0027] Using pig iron, recycle material, scrap steel, ferrosilicon, ferromanganese, electrolytic copper, antimony ingot as raw material ingredients, adopting cupola-electric furnace double smelting, adopting the spheroidizing method, the spheroidizing agent is rare earth magnesium ferrosilicon alloy, adding The amount is 0.90% of the total weight of the molten iron, and the flow rate of the molten iron into the spheroidizing bag is increased, so that the spheroidization reaction is completed within 64s; the multiple inoculation technology is adopted, and the number of inoculations is controlled at 3 times, including in-mold inoculation and Inoculated with the flow; finally produced molten iron consisting of the following weight percentages: C 3.60%, Si 2.12%, Mn 0.2%, P 0.02%, S 0.009%, Cu 0.8%, Sb 0.01%, Re 0.011%, Mg 0.035%, the balance is iron. The molten iron is allowed to stand at 1305°C, and the casting is poured.
[0028] When the casting is cooled, ...
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