Ductile iron castings of cast iron knowledge to answer

Carbon in cast iron graphite to form precipitation, precipitation of graphite in cast iron if strip when called grey cast iron or gray iron, vermicular cast iron is the name of vermicular graphite cast iron is the name, the flocculent white cast iron, cast iron or code was called nodular cast iron ball at.

Ductile iron chemical composition of iron removal and abroad usually: carbon content of 3 ~ 4%, the silicon content of 1.8 ~ 3.2%, manganese, phosphorus, sulfur amount does not exceed 3% and small amount of rare earth, magnesium nodularizing elements such as. Cast iron is the iron carbon alloys containing more than 2.14% C, pig iron, scrap steel industry by materials such as iron and steel and its alloy after high temperature melting and casting molding, in addition to Fe, Si, Mn, also containing C, S, P five elements and other alloy elements.

Separated effect of spheroidal graphite to metal substrate than other shape graphite is small, can make the cast iron matrix structure strength strength reached 70 ~ 90%, the tensile strength can reach 120kgf/mm2, and has a good toughness. decide.