Nodular cast iron material for draught fan and preparation method and application of nodular cast iron for draught fan
A technology of ductile iron and fans, which is applied in mechanical equipment, wind engines, machines/engines, etc. It can solve problems such as yield strength, tensile strength and impact energy that are difficult to meet the development requirements of the fan industry, bulky, and complex structures. , to achieve the effect of simple structure, simple process operation and low cost
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Embodiment 1
[0028] Pig iron is mainly used as the material, and the elemental composition of the ductile iron material: carbon 3.85%, manganese 0.19%, silicon 2.03%, phosphorus 0.003%, sulfur 0.022%, nickel 1.65%, antimony 0.002%, magnesium 0.03%, RE 0.03%, The rest is iron and impurities from the preparation process.
[0029] Prepare the ductile iron material according to the above recipe. First smelting, the temperature of the molten iron is controlled at 1420-1450°C. After the spheroidization treatment, the spheroidizer (FeSiMg 8 RE 3 ) in an amount of 1.0-1.2%, and the spheroidizing temperature is 1420-1450°C.
[0030] After pouring, slowly cool in the sand mold to 350-400°C and clear out from the mold.
Embodiment 2
[0032] Pig iron is mainly used as the material, and the elemental composition of the ductile iron material: carbon 3.85%, manganese 0.19%, silicon 2.03%, phosphorus 0.003%, sulfur 0.022%, nickel 1.20%, antimony 0.005%, magnesium 0.03%, RE 0.03%, The rest is iron and impurities from the preparation process.
[0033] Prepare the ductile iron material according to the above recipe. First smelting, the temperature of the molten iron is controlled at 1420-1450°C. After the spheroidizing treatment, the addition amount of the spheroidizing agent (FeSiMg8RE3) is 1.0-1.2%, and the spheroidizing temperature is 1420-1450°C.
[0034] After pouring, slowly cool in the sand mold to 350-400°C and clear out from the mold.
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