The origin of Ductile iron Casting and its different types of applications

- Oct 10, 2018 -

Ductile iron Casting, which is a material and widely used in some industries, requires a comprehensive understanding and understanding to know what it is and how to properly use and manufacture good quality products.


1. The Ductile iron Casting and chemical composition of ductile iron

Ductile iron Casting, which is based on cast iron, and which is one of cast iron.

Cast iron: It is an iron-carbon alloy with a carbon content of more than 2.11%. It is obtained by high-temperature melting and casting of steel such as industrial pig iron and scrap steel and its alloy materials. In addition to iron, it also has carbon. An element, and, if the precipitated graphite is in the form of a strip, the cast iron is called gray cast iron or gray cast iron; if the graphite is in the form of a worm, it is a vermicular cast iron, and the graphite is in the form of a white cast iron or Code iron. If the graphite is spherical, it is ductile iron.


Among the chemical components of Ductile iron Casting, iron is a major element, and its proportion is large. In addition to the iron element, there are other elements, such as carbon and silicon, and they account for a different proportion, carbon is 3% - 4%, silicon is 1.8% - 3.2%, The total amount of manganese, phosphorus and sulfur does not exceed 3%. In addition, there are appropriate amounts of spheroidizing elements such as rare earths and magnesium.


2. Common uses and specific types of Ductile iron Casting

Common uses of Ductile iron Casting are used to make parts with complex forces and strength, high toughness and good wear resistance, such as crankshafts, camshafts in automobiles, tractors and internal combustion engines, and medium-pressure valves in general machinery. In addition, some storage and transportation containers for storing highly radioactive objects can also be made of spheroidal graphite cast iron.


Ductile iron Casting, which can be reclassified, so the specific types are exemplified below.

High-strength low-alloy ductile iron: The outstanding advantage of this type of ductile iron is its high strength, so it is suitable for some applications where high strength is required.

Heat-resistant ductile iron: This type of ductile iron is characterized by its good heat resistance and can be used on heat-resistant furnaces. Its service life is longer than ordinary heat-resistant cast iron.

Acid-resistant ductile iron: Its outstanding feature is its good corrosion resistance. Compared with ordinary ductile iron, it can improve the corrosion resistance by 10%-90%, and its mechanical strength is also improved.

High-nickel austenitic ductile iron: This type of ductile iron can be used in petroleum mining machinery, chemical equipment and industrial furnace devices, so it has many applications.