Spheroidal graphite is obtained by spheroidizing and inoculation of nodular cast iron. It can effectively improve the mechanical properties of cast iron, especially improve the plasticity and toughness, so as to obtain higher strength than carbon steel.
It should be ductile iron.Ductile iron is a kind of high strength cast iron material developed in 50s twentieth Century, its comprehensive performance is close to the steel, it is based on its excellent performance, has been successfully used in casting complex stress, strength, toughness and wear resistance requirements of the higher parts. Nodular cast iron has developed rapidly to be second only to grey cast iron and widely used as cast iron material. The so-called "iron instead of steel", mainly refers to ductile iron.
Iron is an alloy of iron and carbon carbon content greater than 2.11%, the material industry of pig iron, scrap steel and alloy by high temperature melting and casting and, except for Fe, and also with other cast iron carbon graphite to form precipitation, if precipitation of graphite is the iron strip called gray iron or gray cast iron, cast iron is called the vermicular vermicular cast iron, flocculent is called white cast iron or iron, and is called the code of cast iron ductile iron ball at.
