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What is Ductile Iron, Ductile Iron Properties


Ductile iron is through get spheroidal graphite spheroidization and inoculation, effectively improve the mechanical properties of cast iron, especially improve the plasticity and toughness, and high intensity than carbon steel.

Ductile cast iron is in the 50 s of the 20th century developed a kind of high strength cast iron material, its comprehensive performance is close to steel, it is based on its superior performance, has been successfully used in casting some stress complex, requiring higher strength, toughness, wear resistance parts.

Ductile cast iron has been developed rapidly for behind of gray cast iron, cast iron material. They are widely used. The so-called "iron and steel", mainly refers to nodular cast iron.

Ingredients: pig iron is the carbon content is more than 2% of the iron carbon alloy, industrial iron carbon content is in commonly 2.5%, 4%, and including C, SI, Mn, S, P and other elements. Depending on the state of carbon in cast iron, and can be divided into pig iron for steel making and foundry pig iron and nodular cast iron etc.

Precipitation of spherical graphite cast iron. Spheroidal graphite split function to metal substrate is greatly smaller than flake graphite, make the strength of the cast iron matrix organization intensity of 70 ~ 90%, the tensile strength of up to 120 KGF/was, and it has good toughness. The chemical composition of ductile cast iron in addition to the iron is usually: carbon content of 3.6 ~ 3.8% and 2.0 ~ 3.0%, and silicon content, phosphorus, sulfur, manganese content in the total amount is less than 1.5% and the right amount of rare earth, magnesium nodulizing agent, etc.

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