A ductile iron casting process

Abstract

The invention provides a nodular iron casting process, which includes the following steps: (1) Nodularizing package preparation: the nodularizing package includes a package body and a package cover, first sprinkle nodulizers into the pits in the package body, inoculate (2) Melting and pouring: the production of pouring liquid, the percentage content of the chemical composition of the raw materials is as follows: C: 4.2~4.6%; Si: 0.95~1.15 %; Mn: 0.12~0.18%; P: 0.034%; S: 0.024%; the rest is Fe; the above raw materials are heated to the melting temperature in the electric furnace to fully melt the alloy to form molten iron; pour the molten iron into the ladle cover In the cavity of the slot mold, the molten iron is continuously poured into the spheroidizing bag at the other end of the pit from the inlet of the casting liquid, and the molten iron is spheroidized and inoculated in the spheroidizing bag to form a pouring liquid; the cavity is poured with the pouring liquid , to form a casting after solidification. Through the casting process of the invention, the absorption rate of the nodulizer can be improved, the usage amount of the nodulizer can be reduced, the casting cost can be reduced, and the environment can be improved.

Description

technical field [0001] The invention relates to a casting process, in particular to a ductile iron casting process, which belongs to the technical field of casting. Background technique [0002] Ductile iron is one of the most widely used cast iron materials at present. It has the characteristics of high strength, high elongation, strong fatigue resistance and excellent wear resistance. Shipbuilding, metallurgy, chemical industry and other departments. The existing ductile iron casting process has a low absorption rate of the nodulizer due to unstable nodularization reaction, and the molten iron splashes out the nodulizer, resulting in a large amount of nodulizer usage, and at the same time, the operating environment is polluted by flashes and dense smoke during nodularization . Contents of the invention [0003] In order to solve the deficiencies in the background technology, the purpose of the present invention is to overcome the defects of the background technology, p...

AI Technical Summary

Problems solved by technology

The existing ductile iron casting process has a low absorption rate of the nodulizer due to unstable nodularization reaction, and the molten iron splashes out the nodulizer, resulting in a large amount of nodulizer usage, and at the same time, the operating environment is polluted by flashes and dense smoke during nodularization

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