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

Active Publication Date: 2014-01-01
RIYUE HEAVY IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a key component of a wind turbine, the planetary frame must be strong enough to withstand the environmental impact. However, as the wall thickness of the casting increases, the graphite morphology and matrix structure of the ductile iron casting will deteriorate. Therefore, the current There are technologies that require later heat treatment to ensur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[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...

Example Embodiment

[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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PUM

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Abstract

The invention provides a production method of spheroidal graphite cast iron for a planet carrier and particularly discloses a production method of heat-resistant spheroidal graphite cast iron for a fuel inlet housing. The production method comprises a material preparation process, a smelting process, a spheroidizing process, an inoculating process and a casting process. The heat-resistant spheroidal graphite cast iron for the gas inlet housing comprises the following components in percentage by weight: 3.00 to 3.40% of C, 3.60 to 4.00% of Si, 0.30 to 0.60% of Mn, not greater than 0.050% of P, not greater than 0.020% of S, 0.010 to 0.030% of Re, 0.020 to 0.060% of Mg, 0.40 to 0.70% of Mo, and the balance of iron. The heat-resistant spheroidal graphite cast iron for the gas inlet housing, produced by the method, is high in high-temperature strength and has oxidation resistance, anti-growth resistance and other heat-resistant performances.

Description

technical field [0001] The invention relates to a production method of nodular cast iron, in particular to a production method of nodular cast iron for a planet carrier. Background technique [0002] With the change of my country's energy structure, the gradual maturity of wind power technology, the reduction of costs and the promotion of strong support from national policies, the growth rate of domestic wind power installed capacity will be significant in the future. As a key component of the wind turbine, the planetary carrier must have sufficient strength to withstand the environmental impact. However, as the wall thickness of the casting increases, the graphite form and matrix structure of the ductile iron casting will deteriorate. Therefore, the current There are technologies that require later heat treatment to ensure that the ductile iron planet carrier castings meet the requirements of mechanical properties, but heat treatment brings problems such as complex operatio...

Claims

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Application Information

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IPC IPC(8): C22C37/10C22C33/08C22C33/10
Inventor 应亮郑燕华宋贤发傅明康
Owner RIYUE HEAVY IND
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