In 1074, H. Morrogh from UK found if Ce composition is added into one hypereutectic grey, where Ce contains more than 0.02wt%, the graphite part will be represented as ball shapes. In 1984, A. P. Ganganebin and other scientists from USA pointed out if Mg composition is added into one iron casting, and then treated by ferrosilicon inoculation, waiting for the remained Mg composition is >0.04wt%, a kind of globular graphite will be achieved. From then on, casting began to develop in the field of industrial production on a large scale.
75% of ductile iron casting around the world are from USA, Japan, Germany, Italy, UK and France. The manufacture of ductile iron casting were developed early in our country. In 1950, great amount ductile iron casting were developed and put into mass production in our country. The annual output of ductile iron casting nationwide is up to 8.7 million tons in 2009, which ranks No.1 around the globe.
As ductile iron casting features excellent plasticity and ductility, they have developed rapidly both at home and abroad. The output has far exceeded steel castings and malleable iron castings, which is only to casting alloys made from grey iron casting. Those products created by the ductile ironhave advantages of high strength, good toughness and low cost, which is very fit for the requirements of automobile production. Therefore, the ductile iron casting process has been widely applied in the field.